High-temperature catalysts through sol–gel synthesis
Identifieur interne : 000409 ( Istex/Corpus ); précédent : 000408; suivant : 000410High-temperature catalysts through sol–gel synthesis
Auteurs : A. J Lecloux ; J. P PirardSource :
- Journal of Non-Crystalline Solids [ 0022-3093 ] ; 1998.
Abstract
Sol–gel chemistry is an efficient tool for controlling morphology and reactivity of solids and its potential in the development of tailor-made and thermally stable industrial catalysts is discussed. The key targets in catalyst preparation are mechanically and thermally stable morphology, highly dispersed active phase on homogeneous carrier and porosity minimising diffusional limitation. Sol–gel chemistry approach to the development of such catalysts is illustrated through examples. By controlling gelation and drying steps, `aerogel-like' morphologies with good mechanical properties in which the reactants molecules have an open access to the active sites, practically without mass transfer limitation are obtained under non-hypercritical conditions. Highly dispersed supported metallic catalysts as well as homogeneous mixed oxides carriers have been prepared which remain very stable at high temperature. This opens the way to prepare high-performance industrial catalysts which could not be prepared without the sol–gel approach.
Url:
DOI: 10.1016/S0022-3093(98)00034-9
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P Pirard</name><affiliation><mods:affiliation>Université de Liège, Laboratoire de Génie Chimique, Institut de Chimie B6, B-4000 Liège, Belgium</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:5A1678B9749435CD860C6B10843FEF806FCA7390</idno><date when="1998" year="1998">1998</date><idno type="doi">10.1016/S0022-3093(98)00034-9</idno><idno type="url">https://api.istex.fr/document/5A1678B9749435CD860C6B10843FEF806FCA7390/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000409</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">High-temperature catalysts through sol–gel synthesis</title><author><name sortKey="Lecloux, A J" sort="Lecloux, A J" uniqKey="Lecloux A" first="A. J" last="Lecloux">A. J Lecloux</name><affiliation><mods:affiliation>Université de Liège, Laboratoire de Génie Chimique, Institut de Chimie B6, B-4000 Liège, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Pirard, J P" sort="Pirard, J P" uniqKey="Pirard J" first="J. P" last="Pirard">J. P Pirard</name><affiliation><mods:affiliation>Université de Liège, Laboratoire de Génie Chimique, Institut de Chimie B6, B-4000 Liège, Belgium</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Non-Crystalline Solids</title><title level="j" type="abbrev">NOC</title><idno type="ISSN">0022-3093</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1998">1998</date><biblScope unit="volume">225</biblScope><biblScope unit="supplement">C</biblScope><biblScope unit="page" from="146">146</biblScope><biblScope unit="page" to="152">152</biblScope></imprint><idno type="ISSN">0022-3093</idno></series><idno type="istex">5A1678B9749435CD860C6B10843FEF806FCA7390</idno><idno type="DOI">10.1016/S0022-3093(98)00034-9</idno><idno type="PII">S0022-3093(98)00034-9</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-3093</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Sol–gel chemistry is an efficient tool for controlling morphology and reactivity of solids and its potential in the development of tailor-made and thermally stable industrial catalysts is discussed. The key targets in catalyst preparation are mechanically and thermally stable morphology, highly dispersed active phase on homogeneous carrier and porosity minimising diffusional limitation. Sol–gel chemistry approach to the development of such catalysts is illustrated through examples. By controlling gelation and drying steps, `aerogel-like' morphologies with good mechanical properties in which the reactants molecules have an open access to the active sites, practically without mass transfer limitation are obtained under non-hypercritical conditions. Highly dispersed supported metallic catalysts as well as homogeneous mixed oxides carriers have been prepared which remain very stable at high temperature. 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Catalysts. Surface function</note><note type="content">Fig. 1: Aggregation patterns of `elementary particles': (a) relatively linear aggregate; (b) branched aggregate.</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a">High-temperature catalysts through sol–gel synthesis</title><author xml:id="author-1"><persName><forename type="first">A.J</forename><surname>Lecloux</surname></persName><note type="correspondence"><p>Corresponding author. Tel.: +32-2 676 7306; fax: +32-2 676 7241; e-mail: ale@cefic.be.</p></note><affiliation>Université de Liège, Laboratoire de Génie Chimique, Institut de Chimie B6, B-4000 Liège, Belgium</affiliation></author><author xml:id="author-2"><persName><forename type="first">J.P</forename><surname>Pirard</surname></persName><affiliation>Université de Liège, Laboratoire de Génie Chimique, Institut de Chimie B6, B-4000 Liège, Belgium</affiliation></author></analytic><monogr><title level="j">Journal of Non-Crystalline Solids</title><title level="j" type="abbrev">NOC</title><idno type="pISSN">0022-3093</idno><idno type="PII">S0022-3093(00)X0095-6</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1998"></date><biblScope unit="volume">225</biblScope><biblScope unit="supplement">C</biblScope><biblScope unit="page" from="146">146</biblScope><biblScope unit="page" to="152">152</biblScope></imprint></monogr><idno type="istex">5A1678B9749435CD860C6B10843FEF806FCA7390</idno><idno type="DOI">10.1016/S0022-3093(98)00034-9</idno><idno type="PII">S0022-3093(98)00034-9</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1998</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Sol–gel chemistry is an efficient tool for controlling morphology and reactivity of solids and its potential in the development of tailor-made and thermally stable industrial catalysts is discussed. The key targets in catalyst preparation are mechanically and thermally stable morphology, highly dispersed active phase on homogeneous carrier and porosity minimising diffusional limitation. Sol–gel chemistry approach to the development of such catalysts is illustrated through examples. By controlling gelation and drying steps, `aerogel-like' morphologies with good mechanical properties in which the reactants molecules have an open access to the active sites, practically without mass transfer limitation are obtained under non-hypercritical conditions. Highly dispersed supported metallic catalysts as well as homogeneous mixed oxides carriers have been prepared which remain very stable at high temperature. This opens the way to prepare high-performance industrial catalysts which could not be prepared without the sol–gel approach.</p></abstract><textClass><keywords scheme="keyword"><list><head>Keywords</head><item><term>Catalyst synthesis</term></item><item><term>Sol–gel chemistry</term></item><item><term>Morphology</term></item></list></keywords></textClass><textClass><keywords scheme="keyword"><list><head>Keywords</head><item><term>A120</term></item><item><term>C130</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1998">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/5A1678B9749435CD860C6B10843FEF806FCA7390/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: ce:floats; body; tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"><istex:entity SYSTEM="gr1" NDATA="IMAGE" name="gr1"></istex:entity></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla"><item-info><jid>NOC</jid><aid>3829</aid><ce:pii>S0022-3093(98)00034-9</ce:pii><ce:doi>10.1016/S0022-3093(98)00034-9</ce:doi><ce:copyright year="1998" type="full-transfer">Elsevier Science B.V.</ce:copyright></item-info><head><ce:dochead><ce:textfn>Section 4. 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The key targets in catalyst preparation are mechanically and thermally stable morphology, highly dispersed active phase on homogeneous carrier and porosity minimising diffusional limitation. Sol–gel chemistry approach to the development of such catalysts is illustrated through examples. By controlling gelation and drying steps, `aerogel-like' morphologies with good mechanical properties in which the reactants molecules have an open access to the active sites, practically without mass transfer limitation are obtained under non-hypercritical conditions. Highly dispersed supported metallic catalysts as well as homogeneous mixed oxides carriers have been prepared which remain very stable at high temperature. 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