Consequence of flow nonuniformity on the measurement of effective diffusivity
Identifieur interne : 000A18 ( Istex/Corpus ); précédent : 000A17; suivant : 000A19Consequence of flow nonuniformity on the measurement of effective diffusivity
Auteurs : L. C. Cui ; D. Schweich ; J. VillermauxSource :
- AIChE Journal [ 0001-1541 ] ; 1990-01.
English descriptors
- KwdEn :
- Additive contributions, Adjustable parameter, Aiche journal, Alche journal, Alumina, Axial, Axial dispersion, Axial dispersion coefficient, Capacity factor, Chem, Chromatographic, Chromatographic column, Chromatographic experiments, Chromatographic method, Chromatographic peaks, Classical correlations, Coefficient, Column diameter, Column diameter ratios, Column length, Correction factor, Data points, Deemter method, Diffusion coefficient, Diffusion coefficients, Diffusivity, Dispersion, Dispersion contribution, Dispersion parameter, Dispersion process, Effective diffusion coefficient, Effective diffusivity, Effective mass transfer time, Empirical correlations, Experimental conditions, Experimental curves, Experimental results, External mass transfer, External mass transfer coefficient, External mass transfer time, External porosity, External porosity distribution, Flow heterogeneity, Flow rate, Fluid heat, Fluid velocity, General case, Impregnated alumina, Inert tracer, Internal diffusivity, Internal mass transfer, Internal mass transfer time, Internal porosity, Large pore catalyst, Latter authors, Latter case, Mass transfer, Mass transfer coefficients, Mass transfer parameters, Mass transfer time, Mechanical dispersion regime, Nonporous, Nonporous particles, Nonuniform, Nonuniform porosity, Overall mass transfer time, Parallel lines, Parameter, Particle diameter, Particle peclet number, Partition coefficient, Peak variance, Porosity, Porosity distribution, Porous alumina, Porous particle, Porous particles, Radial dispersion, Residence time, Results show, Retention time, Reynolds number, Reynolds numbers, Rodrigues, Straight lines, Tracer, Transfer function, Uniform model, Uniform porosity, Variance, Various tracers, Villermaux, Void fraction, Volume fraction, Volumetric flow rate.
- Teeft :
- Additive contributions, Adjustable parameter, Aiche journal, Alche journal, Alumina, Axial, Axial dispersion, Axial dispersion coefficient, Capacity factor, Chem, Chromatographic, Chromatographic column, Chromatographic experiments, Chromatographic method, Chromatographic peaks, Classical correlations, Coefficient, Column diameter, Column diameter ratios, Column length, Correction factor, Data points, Deemter method, Diffusion coefficient, Diffusion coefficients, Diffusivity, Dispersion, Dispersion contribution, Dispersion parameter, Dispersion process, Effective diffusion coefficient, Effective diffusivity, Effective mass transfer time, Empirical correlations, Experimental conditions, Experimental curves, Experimental results, External mass transfer, External mass transfer coefficient, External mass transfer time, External porosity, External porosity distribution, Flow heterogeneity, Flow rate, Fluid heat, Fluid velocity, General case, Impregnated alumina, Inert tracer, Internal diffusivity, Internal mass transfer, Internal mass transfer time, Internal porosity, Large pore catalyst, Latter authors, Latter case, Mass transfer, Mass transfer coefficients, Mass transfer parameters, Mass transfer time, Mechanical dispersion regime, Nonporous, Nonporous particles, Nonuniform, Nonuniform porosity, Overall mass transfer time, Parallel lines, Parameter, Particle diameter, Particle peclet number, Partition coefficient, Peak variance, Porosity, Porosity distribution, Porous alumina, Porous particle, Porous particles, Radial dispersion, Residence time, Results show, Retention time, Reynolds number, Reynolds numbers, Rodrigues, Straight lines, Tracer, Transfer function, Uniform model, Uniform porosity, Variance, Various tracers, Villermaux, Void fraction, Volume fraction, Volumetric flow rate.
Abstract
Measurements of effective diffusivity by the chromatographic method are shown to be biased by nonuniformity of the external porosity in a cross‐section of the column. A very simple model is proposed to interpret experimental results. A modified Van Deemter method is given to extract the axial dispersion and effective diffusion coefficients from chromatographic peaks. This method allows one to ignore the external porosity distribution. Experiments show that even though axial dispersion obeys classical correlations, the internal mass transfer parameters may be strongly affected by the external porosity distribution.
Url:
DOI: 10.1002/aic.690360111
Links to Exploration step
ISTEX:F79818418BDB05B068D626123A9CF9F1096CB27FLe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Consequence of flow nonuniformity on the measurement of effective diffusivity</title><author><name sortKey="Cui, L C" sort="Cui, L C" uniqKey="Cui L" first="L. C." last="Cui">L. C. Cui</name><affiliation><mods:affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Schweich, D" sort="Schweich, D" uniqKey="Schweich D" first="D." last="Schweich">D. Schweich</name><affiliation><mods:affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Villermaux, J" sort="Villermaux, J" uniqKey="Villermaux J" first="J." last="Villermaux">J. Villermaux</name><affiliation><mods:affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:F79818418BDB05B068D626123A9CF9F1096CB27F</idno><date when="1990" year="1990">1990</date><idno type="doi">10.1002/aic.690360111</idno><idno type="url">https://api.istex.fr/document/F79818418BDB05B068D626123A9CF9F1096CB27F/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000A18</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000A18</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Consequence of flow nonuniformity on the measurement of effective diffusivity</title><author><name sortKey="Cui, L C" sort="Cui, L C" uniqKey="Cui L" first="L. C." last="Cui">L. C. Cui</name><affiliation><mods:affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Schweich, D" sort="Schweich, D" uniqKey="Schweich D" first="D." last="Schweich">D. Schweich</name><affiliation><mods:affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Villermaux, J" sort="Villermaux, J" uniqKey="Villermaux J" first="J." last="Villermaux">J. Villermaux</name><affiliation><mods:affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">AIChE Journal</title><title level="j" type="alt">AICHE JOURNAL</title><idno type="ISSN">0001-1541</idno><idno type="eISSN">1547-5905</idno><imprint><biblScope unit="vol">36</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="86">86</biblScope><biblScope unit="page" to="92">92</biblScope><biblScope unit="page-count">7</biblScope><publisher>American Institute of Chemical Engineers</publisher><pubPlace>New York</pubPlace><date type="published" when="1990-01">1990-01</date></imprint><idno type="ISSN">0001-1541</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0001-1541</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Additive contributions</term><term>Adjustable parameter</term><term>Aiche journal</term><term>Alche journal</term><term>Alumina</term><term>Axial</term><term>Axial dispersion</term><term>Axial dispersion coefficient</term><term>Capacity factor</term><term>Chem</term><term>Chromatographic</term><term>Chromatographic column</term><term>Chromatographic experiments</term><term>Chromatographic method</term><term>Chromatographic peaks</term><term>Classical correlations</term><term>Coefficient</term><term>Column diameter</term><term>Column diameter ratios</term><term>Column length</term><term>Correction factor</term><term>Data points</term><term>Deemter method</term><term>Diffusion coefficient</term><term>Diffusion coefficients</term><term>Diffusivity</term><term>Dispersion</term><term>Dispersion contribution</term><term>Dispersion parameter</term><term>Dispersion process</term><term>Effective diffusion coefficient</term><term>Effective diffusivity</term><term>Effective mass transfer time</term><term>Empirical correlations</term><term>Experimental conditions</term><term>Experimental curves</term><term>Experimental results</term><term>External mass transfer</term><term>External mass transfer coefficient</term><term>External mass transfer time</term><term>External porosity</term><term>External porosity distribution</term><term>Flow heterogeneity</term><term>Flow rate</term><term>Fluid heat</term><term>Fluid velocity</term><term>General case</term><term>Impregnated alumina</term><term>Inert tracer</term><term>Internal diffusivity</term><term>Internal mass transfer</term><term>Internal mass transfer time</term><term>Internal porosity</term><term>Large pore catalyst</term><term>Latter authors</term><term>Latter case</term><term>Mass transfer</term><term>Mass transfer coefficients</term><term>Mass transfer parameters</term><term>Mass transfer time</term><term>Mechanical dispersion regime</term><term>Nonporous</term><term>Nonporous particles</term><term>Nonuniform</term><term>Nonuniform porosity</term><term>Overall mass transfer time</term><term>Parallel lines</term><term>Parameter</term><term>Particle diameter</term><term>Particle peclet number</term><term>Partition coefficient</term><term>Peak variance</term><term>Porosity</term><term>Porosity distribution</term><term>Porous alumina</term><term>Porous particle</term><term>Porous particles</term><term>Radial dispersion</term><term>Residence time</term><term>Results show</term><term>Retention time</term><term>Reynolds number</term><term>Reynolds numbers</term><term>Rodrigues</term><term>Straight lines</term><term>Tracer</term><term>Transfer function</term><term>Uniform model</term><term>Uniform porosity</term><term>Variance</term><term>Various tracers</term><term>Villermaux</term><term>Void fraction</term><term>Volume fraction</term><term>Volumetric flow rate</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Additive contributions</term><term>Adjustable parameter</term><term>Aiche journal</term><term>Alche journal</term><term>Alumina</term><term>Axial</term><term>Axial dispersion</term><term>Axial dispersion coefficient</term><term>Capacity factor</term><term>Chem</term><term>Chromatographic</term><term>Chromatographic column</term><term>Chromatographic experiments</term><term>Chromatographic method</term><term>Chromatographic peaks</term><term>Classical correlations</term><term>Coefficient</term><term>Column diameter</term><term>Column diameter ratios</term><term>Column length</term><term>Correction factor</term><term>Data points</term><term>Deemter method</term><term>Diffusion coefficient</term><term>Diffusion coefficients</term><term>Diffusivity</term><term>Dispersion</term><term>Dispersion contribution</term><term>Dispersion parameter</term><term>Dispersion process</term><term>Effective diffusion coefficient</term><term>Effective diffusivity</term><term>Effective mass transfer time</term><term>Empirical correlations</term><term>Experimental conditions</term><term>Experimental curves</term><term>Experimental results</term><term>External mass transfer</term><term>External mass transfer coefficient</term><term>External mass transfer time</term><term>External porosity</term><term>External porosity distribution</term><term>Flow heterogeneity</term><term>Flow rate</term><term>Fluid heat</term><term>Fluid velocity</term><term>General case</term><term>Impregnated alumina</term><term>Inert tracer</term><term>Internal diffusivity</term><term>Internal mass transfer</term><term>Internal mass transfer time</term><term>Internal porosity</term><term>Large pore catalyst</term><term>Latter authors</term><term>Latter case</term><term>Mass transfer</term><term>Mass transfer coefficients</term><term>Mass transfer parameters</term><term>Mass transfer time</term><term>Mechanical dispersion regime</term><term>Nonporous</term><term>Nonporous particles</term><term>Nonuniform</term><term>Nonuniform porosity</term><term>Overall mass transfer time</term><term>Parallel lines</term><term>Parameter</term><term>Particle diameter</term><term>Particle peclet number</term><term>Partition coefficient</term><term>Peak variance</term><term>Porosity</term><term>Porosity distribution</term><term>Porous alumina</term><term>Porous particle</term><term>Porous particles</term><term>Radial dispersion</term><term>Residence time</term><term>Results show</term><term>Retention time</term><term>Reynolds number</term><term>Reynolds numbers</term><term>Rodrigues</term><term>Straight lines</term><term>Tracer</term><term>Transfer function</term><term>Uniform model</term><term>Uniform porosity</term><term>Variance</term><term>Various tracers</term><term>Villermaux</term><term>Void fraction</term><term>Volume fraction</term><term>Volumetric flow rate</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Measurements of effective diffusivity by the chromatographic method are shown to be biased by nonuniformity of the external porosity in a cross‐section of the column. A very simple model is proposed to interpret experimental results. A modified Van Deemter method is given to extract the axial dispersion and effective diffusion coefficients from chromatographic peaks. This method allows one to ignore the external porosity distribution. Experiments show that even though axial dispersion obeys classical correlations, the internal mass transfer parameters may be strongly affected by the external porosity distribution.</div></front></TEI><istex><corpusName>wiley</corpusName><keywords><teeft><json:string>alumina</json:string><json:string>axial dispersion</json:string><json:string>chem</json:string><json:string>tracer</json:string><json:string>nonuniform</json:string><json:string>retention time</json:string><json:string>experimental curves</json:string><json:string>porosity</json:string><json:string>diffusivity</json:string><json:string>flow rate</json:string><json:string>dispersion</json:string><json:string>rodrigues</json:string><json:string>nonporous</json:string><json:string>villermaux</json:string><json:string>external porosity</json:string><json:string>transfer function</json:string><json:string>mass transfer</json:string><json:string>axial</json:string><json:string>uniform porosity</json:string><json:string>capacity factor</json:string><json:string>chromatographic peaks</json:string><json:string>mass transfer time</json:string><json:string>void fraction</json:string><json:string>residence time</json:string><json:string>coefficient</json:string><json:string>variance</json:string><json:string>volume fraction</json:string><json:string>partition coefficient</json:string><json:string>internal porosity</json:string><json:string>uniform model</json:string><json:string>peak variance</json:string><json:string>classical correlations</json:string><json:string>particle diameter</json:string><json:string>experimental conditions</json:string><json:string>correction factor</json:string><json:string>porous particles</json:string><json:string>porosity distribution</json:string><json:string>data points</json:string><json:string>impregnated alumina</json:string><json:string>external porosity distribution</json:string><json:string>mass transfer coefficients</json:string><json:string>overall mass transfer time</json:string><json:string>empirical correlations</json:string><json:string>deemter method</json:string><json:string>nonporous particles</json:string><json:string>external mass transfer</json:string><json:string>porous particle</json:string><json:string>volumetric flow rate</json:string><json:string>effective diffusivity</json:string><json:string>experimental results</json:string><json:string>various tracers</json:string><json:string>dispersion parameter</json:string><json:string>parallel lines</json:string><json:string>straight lines</json:string><json:string>aiche journal</json:string><json:string>internal mass transfer time</json:string><json:string>nonuniform porosity</json:string><json:string>internal mass transfer</json:string><json:string>chromatographic</json:string><json:string>radial dispersion</json:string><json:string>latter authors</json:string><json:string>axial dispersion coefficient</json:string><json:string>effective diffusion coefficient</json:string><json:string>effective mass transfer time</json:string><json:string>column length</json:string><json:string>internal diffusivity</json:string><json:string>chromatographic method</json:string><json:string>mass transfer parameters</json:string><json:string>adjustable parameter</json:string><json:string>large pore catalyst</json:string><json:string>mechanical dispersion regime</json:string><json:string>chromatographic column</json:string><json:string>general case</json:string><json:string>alche journal</json:string><json:string>additive contributions</json:string><json:string>dispersion process</json:string><json:string>fluid velocity</json:string><json:string>external mass transfer time</json:string><json:string>porous alumina</json:string><json:string>particle peclet number</json:string><json:string>inert tracer</json:string><json:string>diffusion coefficient</json:string><json:string>diffusion coefficients</json:string><json:string>column diameter</json:string><json:string>results show</json:string><json:string>dispersion contribution</json:string><json:string>chromatographic experiments</json:string><json:string>latter case</json:string><json:string>reynolds numbers</json:string><json:string>external mass transfer coefficient</json:string><json:string>reynolds number</json:string><json:string>column diameter ratios</json:string><json:string>flow heterogeneity</json:string><json:string>fluid heat</json:string><json:string>parameter</json:string></teeft></keywords><author><json:item><name>L. C. Cui</name><affiliations><json:string>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</json:string></affiliations></json:item><json:item><name>D. Schweich</name><affiliations><json:string>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</json:string></affiliations></json:item><json:item><name>J. Villermaux</name><affiliations><json:string>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</json:string></affiliations></json:item></author><articleId><json:string>AIC690360111</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Measurements of effective diffusivity by the chromatographic method are shown to be biased by nonuniformity of the external porosity in a cross‐section of the column. A very simple model is proposed to interpret experimental results. A modified Van Deemter method is given to extract the axial dispersion and effective diffusion coefficients from chromatographic peaks. This method allows one to ignore the external porosity distribution. Experiments show that even though axial dispersion obeys classical correlations, the internal mass transfer parameters may be strongly affected by the external porosity distribution.</abstract><qualityIndicators><score>5.501</score><pdfVersion>1.3</pdfVersion><pdfPageSize>558 x 774 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>621</abstractCharCount><pdfWordCount>4445</pdfWordCount><pdfCharCount>25770</pdfCharCount><pdfPageCount>7</pdfPageCount><abstractWordCount>88</abstractWordCount></qualityIndicators><title>Consequence of flow nonuniformity on the measurement of effective diffusivity</title><genre><json:string>article</json:string></genre><host><title>AIChE Journal</title><language><json:string>unknown</json:string></language><doi><json:string>10.1002/(ISSN)1547-5905</json:string></doi><issn><json:string>0001-1541</json:string></issn><eissn><json:string>1547-5905</json:string></eissn><publisherId><json:string>AIC</json:string></publisherId><volume>36</volume><issue>1</issue><pages><first>86</first><last>92</last><total>7</total></pages><genre><json:string>journal</json:string></genre><subject><json:item><value>Article</value></json:item></subject></host><categories><wos><json:string>science</json:string><json:string>engineering, chemical</json:string></wos><scienceMetrix><json:string>applied sciences</json:string><json:string>engineering</json:string><json:string>chemical engineering</json:string></scienceMetrix><inist><json:string>sciences appliquees, technologies et medecines</json:string><json:string>sciences exactes et technologie</json:string><json:string>chimie</json:string><json:string>chimie analytique</json:string></inist></categories><publicationDate>1990</publicationDate><copyrightDate>1990</copyrightDate><doi><json:string>10.1002/aic.690360111</json:string></doi><id>F79818418BDB05B068D626123A9CF9F1096CB27F</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/F79818418BDB05B068D626123A9CF9F1096CB27F/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/F79818418BDB05B068D626123A9CF9F1096CB27F/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/F79818418BDB05B068D626123A9CF9F1096CB27F/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Consequence of flow nonuniformity on the measurement of effective diffusivity</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>American Institute of Chemical Engineers</publisher><pubPlace>New York</pubPlace><availability><licence>Copyright © 1990 American Institute of Chemical Engineers</licence></availability><date type="published" when="1990-01"></date></publicationStmt><notesStmt><note type="content-type" subtype="article" source="article" scheme="https://content-type.data.istex.fr/ark:/67375/XTP-6N5SZHKN-D">article</note><note type="publication-type" subtype="journal" scheme="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</note></notesStmt><sourceDesc><biblStruct type="article"><analytic><title level="a" type="main" xml:lang="en">Consequence of flow nonuniformity on the measurement of effective diffusivity</title><title level="a" type="short" xml:lang="en">Consequence of Flow Nonuniformity on the Measurement of Effective Diffusivity</title><author xml:id="author-0000"><persName><forename type="first">L. C.</forename><surname>Cui</surname></persName><affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France<address><country key="FR"></country></address></affiliation></author><author xml:id="author-0001"><persName><forename type="first">D.</forename><surname>Schweich</surname></persName><affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France<address><country key="FR"></country></address></affiliation></author><author xml:id="author-0002"><persName><forename type="first">J.</forename><surname>Villermaux</surname></persName><affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France<address><country key="FR"></country></address></affiliation></author><idno type="istex">F79818418BDB05B068D626123A9CF9F1096CB27F</idno><idno type="ark">ark:/67375/WNG-SV01MZ0V-F</idno><idno type="DOI">10.1002/aic.690360111</idno><idno type="unit">AIC690360111</idno><idno type="toTypesetVersion">file:AIC.AIC690360111.pdf</idno></analytic><monogr><title level="j" type="main">AIChE Journal</title><title level="j" type="alt">AICHE JOURNAL</title><idno type="pISSN">0001-1541</idno><idno type="eISSN">1547-5905</idno><idno type="book-DOI">10.1002/(ISSN)1547-5905</idno><idno type="book-part-DOI">10.1002/aic.v36:1</idno><idno type="product">AIC</idno><imprint><biblScope unit="vol">36</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="86">86</biblScope><biblScope unit="page" to="92">92</biblScope><biblScope unit="page-count">7</biblScope><publisher>American Institute of Chemical Engineers</publisher><pubPlace>New York</pubPlace><date type="published" when="1990-01"></date></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><abstract xml:lang="en" style="main"><head>Abstract</head><p>Measurements of effective diffusivity by the chromatographic method are shown to be biased by nonuniformity of the external porosity in a cross‐section of the column. A very simple model is proposed to interpret experimental results. A modified Van Deemter method is given to extract the axial dispersion and effective diffusion coefficients from chromatographic peaks. This method allows one to ignore the external porosity distribution. Experiments show that even though axial dispersion obeys classical correlations, the internal mass transfer parameters may be strongly affected by the external porosity distribution.</p></abstract><textClass><keywords rend="articleCategory"><term>Article</term></keywords><keywords rend="tocHeading1"><term>Articles</term></keywords></textClass><langUsage><language ident="en"></language></langUsage></profileDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/F79818418BDB05B068D626123A9CF9F1096CB27F/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>American Institute of Chemical Engineers</publisherName><publisherLoc>New York</publisherLoc></publisherInfo><doi registered="yes">10.1002/(ISSN)1547-5905</doi><issn type="print">0001-1541</issn><issn type="electronic">1547-5905</issn><idGroup><id type="product" value="AIC"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="AICHE JOURNAL">AIChE Journal</title><title type="short">AIChE J.</title></titleGroup></publicationMeta><publicationMeta level="part" position="10"><doi origin="wiley" registered="yes">10.1002/aic.v36:1</doi><numberingGroup><numbering type="journalVolume" number="36">36</numbering><numbering type="journalIssue">1</numbering></numberingGroup><coverDate startDate="1990-01">January 1990</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="11" status="forIssue"><doi origin="wiley" registered="yes">10.1002/aic.690360111</doi><idGroup><id type="unit" value="AIC690360111"></id></idGroup><countGroup><count type="pageTotal" number="7"></count></countGroup><titleGroup><title type="articleCategory">Article</title><title type="tocHeading1">Articles</title></titleGroup><copyright ownership="publisher">Copyright © 1990 American Institute of Chemical Engineers</copyright><eventGroup><event type="manuscriptReceived" date="1989-05-24"></event><event type="manuscriptRevised" date="1989-11-07"></event><event type="firstOnline" date="2004-06-17"></event><event type="publishedOnlineFinalForm" date="2004-06-17"></event><event type="xmlConverted" agent="Converter:JWSART34_TO_WML3G version:2.3.2 mode:FullText source:HeaderRef result:HeaderRef" date="2010-03-09"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-01"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-14"></event></eventGroup><numberingGroup><numbering type="pageFirst">86</numbering><numbering type="pageLast">92</numbering></numberingGroup><linkGroup><link type="toTypesetVersion" href="file:AIC.AIC690360111.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="6"></count><count type="tableTotal" number="3"></count><count type="referenceTotal" number="25"></count></countGroup><titleGroup><title type="main" xml:lang="en">Consequence of flow nonuniformity on the measurement of effective diffusivity</title><title type="short" xml:lang="en">Consequence of Flow Nonuniformity on the Measurement of Effective Diffusivity</title></titleGroup><creators><creator xml:id="au1" creatorRole="author" affiliationRef="#af1"><personName><givenNames>L. C.</givenNames><familyName>Cui</familyName></personName></creator><creator xml:id="au2" creatorRole="author" affiliationRef="#af1"><personName><givenNames>D.</givenNames><familyName>Schweich</familyName></personName></creator><creator xml:id="au3" creatorRole="author" affiliationRef="#af1"><personName><givenNames>J.</givenNames><familyName>Villermaux</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="af1" countryCode="FR" type="organization"><unparsedAffiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>Measurements of effective diffusivity by the chromatographic method are shown to be biased by nonuniformity of the external porosity in a cross‐section of the column. A very simple model is proposed to interpret experimental results. A modified Van Deemter method is given to extract the axial dispersion and effective diffusion coefficients from chromatographic peaks. This method allows one to ignore the external porosity distribution. Experiments show that even though axial dispersion obeys classical correlations, the internal mass transfer parameters may be strongly affected by the external porosity distribution.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Consequence of flow nonuniformity on the measurement of effective diffusivity</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Consequence of Flow Nonuniformity on the Measurement of Effective Diffusivity</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Consequence of flow nonuniformity on the measurement of effective diffusivity</title></titleInfo><name type="personal"><namePart type="given">L. C.</namePart><namePart type="family">Cui</namePart><affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Schweich</namePart><affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Villermaux</namePart><affiliation>Laboratoire des Sciences, du Génie Chimique, CNRS‐ENSIC, BP 451, 1 rue Grandville, 54001, Nancy cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article" authority="ISTEX" authorityURI="https://content-type.data.istex.fr" valueURI="https://content-type.data.istex.fr/ark:/67375/XTP-6N5SZHKN-D">article</genre><originInfo><publisher>American Institute of Chemical Engineers</publisher><place><placeTerm type="text">New York</placeTerm></place><dateIssued encoding="w3cdtf">1990-01</dateIssued><dateCaptured encoding="w3cdtf">1989-05-24</dateCaptured><copyrightDate encoding="w3cdtf">1990</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><extent unit="figures">6</extent><extent unit="tables">3</extent><extent unit="references">25</extent></physicalDescription><abstract lang="en">Measurements of effective diffusivity by the chromatographic method are shown to be biased by nonuniformity of the external porosity in a cross‐section of the column. A very simple model is proposed to interpret experimental results. A modified Van Deemter method is given to extract the axial dispersion and effective diffusion coefficients from chromatographic peaks. This method allows one to ignore the external porosity distribution. Experiments show that even though axial dispersion obeys classical correlations, the internal mass transfer parameters may be strongly affected by the external porosity distribution.</abstract><relatedItem type="host"><titleInfo><title>AIChE Journal</title></titleInfo><titleInfo type="abbreviated"><title>AIChE J.</title></titleInfo><genre type="journal" authority="ISTEX" authorityURI="https://publication-type.data.istex.fr" valueURI="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</genre><subject><genre>article-category</genre><topic>Article</topic></subject><identifier type="ISSN">0001-1541</identifier><identifier type="eISSN">1547-5905</identifier><identifier type="DOI">10.1002/(ISSN)1547-5905</identifier><identifier type="PublisherID">AIC</identifier><part><date>1990</date><detail type="volume"><caption>vol.</caption><number>36</number></detail><detail type="issue"><caption>no.</caption><number>1</number></detail><extent unit="pages"><start>86</start><end>92</end><total>7</total></extent></part></relatedItem><identifier type="istex">F79818418BDB05B068D626123A9CF9F1096CB27F</identifier><identifier type="ark">ark:/67375/WNG-SV01MZ0V-F</identifier><identifier type="DOI">10.1002/aic.690360111</identifier><identifier type="ArticleID">AIC690360111</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 1990 American Institute of Chemical Engineers</accessCondition><recordInfo><recordContentSource authority="ISTEX" authorityURI="https://loaded-corpus.data.istex.fr" valueURI="https://loaded-corpus.data.istex.fr/ark:/67375/XBH-L0C46X92-X">wiley</recordContentSource><recordOrigin>American Institute of Chemical Engineers</recordOrigin></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/F79818418BDB05B068D626123A9CF9F1096CB27F/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Lorraine/explor/LrgpV1/Data/Istex/Corpus
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000A18 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Corpus/biblio.hfd -nk 000A18 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Lorraine
|area= LrgpV1
|flux= Istex
|étape= Corpus
|type= RBID
|clé= ISTEX:F79818418BDB05B068D626123A9CF9F1096CB27F
|texte= Consequence of flow nonuniformity on the measurement of effective diffusivity
}}
| This area was generated with Dilib version V0.6.32. |  |