PoplarV1, Main, Exploration, bibRecord, 003027

Selectivity and delignification kinetics for oxidative and nonoxidative lime pretreatment of poplar wood, part III: long-term.

Identifieur interne : 003027 ( Main/Exploration ); précédent : 003026; suivant : 003028

Selectivity and delignification kinetics for oxidative and nonoxidative lime pretreatment of poplar wood, part III: long-term.

Auteurs : Rocio Sierra [Colombie] ; Laura A. Garcia ; Mark Thomas Holtzapple

Source :

Biotechnology progress [ 1520-6033 ]

RBID : pubmed:20878719

Descripteurs français

KwdFr :
- Bois (composition chimique), Cinétique (MeSH), Composés du calcium (composition chimique), Composés du calcium (métabolisme), Glucides (composition chimique), Oxydes (composition chimique), Oxydes (métabolisme), Oxydoréduction (MeSH), Populus (composition chimique).
MESH :
- composition chimique : Bois, Composés du calcium, Glucides, Oxydes, Populus.
- métabolisme : Composés du calcium, Oxydes.
- Cinétique, Oxydoréduction.

English descriptors

KwdEn :
- Calcium Compounds (chemistry), Calcium Compounds (metabolism), Carbohydrates (chemistry), Kinetics (MeSH), Oxidation-Reduction (MeSH), Oxides (chemistry), Oxides (metabolism), Populus (chemistry), Wood (chemistry).
MESH :
- chemical , chemistry : Calcium Compounds, Carbohydrates, Oxides.
- chemical , metabolism : Calcium Compounds, Oxides.
- chemistry : Populus, Wood.
- Kinetics, Oxidation-Reduction.

Abstract

Lime pretreatment is an effective method for improving lignocellulose digestibility by removing lignin. For several weeks, mixtures of poplar wood, water, and calcium hydroxide (lime) were submitted to temperatures from 25 to 65°C, with and without aeration. Kinetic models for lignin and carbohydrate degradation were obtained as functions of temperature, time, and aeration using first-order kinetics in lignin and carbohydrates. Model 1 considered two reacting moieties (slow and fast), and Model 2 considered three (slow, medium, and fast). Model 1 was statistically better and was employed to determine differential and integral selectivities, which measure the ability of pretreatment to retain carbohydrates while removing lignin. During the first 2 weeks, when lignin content ≥ 0.80 g/g lignin in raw biomass, both glucan and xylan differential and integral selectivities decreased rapidly. Afterwards, selectivities were nearly constant ranging between 0 and 3 g lignin removed/g carbohydrate degraded.

DOI: 10.1002/btpr.493
PubMed: 20878719

Affiliations:

Colombie

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Le document en format XML

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<author><name sortKey="Sierra, Rocio" sort="Sierra, Rocio" uniqKey="Sierra R" first="Rocio" last="Sierra">Rocio Sierra</name>
<affiliation wicri:level="1"><nlm:affiliation>Grupo de Diseño de Productos y Procesos, Dept. de Ingeniería Química, Universidad de los Andes, Bogatá, Columbia. rsierra@uniandes.edu.co</nlm:affiliation>
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<author><name sortKey="Garcia, Laura A" sort="Garcia, Laura A" uniqKey="Garcia L" first="Laura A" last="Garcia">Laura A. Garcia</name>
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<term>Carbohydrates (chemistry)</term>
<term>Kinetics (MeSH)</term>
<term>Oxidation-Reduction (MeSH)</term>
<term>Oxides (chemistry)</term>
<term>Oxides (metabolism)</term>
<term>Populus (chemistry)</term>
<term>Wood (chemistry)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Bois (composition chimique)</term>
<term>Cinétique (MeSH)</term>
<term>Composés du calcium (composition chimique)</term>
<term>Composés du calcium (métabolisme)</term>
<term>Glucides (composition chimique)</term>
<term>Oxydes (composition chimique)</term>
<term>Oxydes (métabolisme)</term>
<term>Oxydoréduction (MeSH)</term>
<term>Populus (composition chimique)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Calcium Compounds</term>
<term>Carbohydrates</term>
<term>Oxides</term>
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<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Calcium Compounds</term>
<term>Oxides</term>
</keywords>
<keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Populus</term>
<term>Wood</term>
</keywords>
<keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Bois</term>
<term>Composés du calcium</term>
<term>Glucides</term>
<term>Oxydes</term>
<term>Populus</term>
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<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Composés du calcium</term>
<term>Oxydes</term>
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<term>Oxidation-Reduction</term>
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<keywords scheme="MESH" xml:lang="fr"><term>Cinétique</term>
<term>Oxydoréduction</term>
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<front><div type="abstract" xml:lang="en">Lime pretreatment is an effective method for improving lignocellulose digestibility by removing lignin. For several weeks, mixtures of poplar wood, water, and calcium hydroxide (lime) were submitted to temperatures from 25 to 65°C, with and without aeration. Kinetic models for lignin and carbohydrate degradation were obtained as functions of temperature, time, and aeration using first-order kinetics in lignin and carbohydrates. Model 1 considered two reacting moieties (slow and fast), and Model 2 considered three (slow, medium, and fast). Model 1 was statistically better and was employed to determine differential and integral selectivities, which measure the ability of pretreatment to retain carbohydrates while removing lignin. During the first 2 weeks, when lignin content ≥ 0.80 g/g lignin in raw biomass, both glucan and xylan differential and integral selectivities decreased rapidly. Afterwards, selectivities were nearly constant ranging between 0 and 3 g lignin removed/g carbohydrate degraded.</div>
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<DateRevised><Year>2012</Year>
<Month>11</Month>
<Day>15</Day>
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<JournalIssue CitedMedium="Internet"><Volume>26</Volume>
<Issue>6</Issue>
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<Title>Biotechnology progress</Title>
<ISOAbbreviation>Biotechnol Prog</ISOAbbreviation>
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<ArticleTitle>Selectivity and delignification kinetics for oxidative and nonoxidative lime pretreatment of poplar wood, part III: long-term.</ArticleTitle>
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<Abstract><AbstractText>Lime pretreatment is an effective method for improving lignocellulose digestibility by removing lignin. For several weeks, mixtures of poplar wood, water, and calcium hydroxide (lime) were submitted to temperatures from 25 to 65°C, with and without aeration. Kinetic models for lignin and carbohydrate degradation were obtained as functions of temperature, time, and aeration using first-order kinetics in lignin and carbohydrates. Model 1 considered two reacting moieties (slow and fast), and Model 2 considered three (slow, medium, and fast). Model 1 was statistically better and was employed to determine differential and integral selectivities, which measure the ability of pretreatment to retain carbohydrates while removing lignin. During the first 2 weeks, when lignin content ≥ 0.80 g/g lignin in raw biomass, both glucan and xylan differential and integral selectivities decreased rapidly. Afterwards, selectivities were nearly constant ranging between 0 and 3 g lignin removed/g carbohydrate degraded.</AbstractText>
<CopyrightInformation>Copyright © 2010 American Institute of Chemical Engineers (AIChE).</CopyrightInformation>
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<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Sierra</LastName>
<ForeName>Rocio</ForeName>
<Initials>R</Initials>
<AffiliationInfo><Affiliation>Grupo de Diseño de Productos y Procesos, Dept. de Ingeniería Química, Universidad de los Andes, Bogatá, Columbia. rsierra@uniandes.edu.co</Affiliation>
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Selectivity and delignification kinetics for oxidative and nonoxidative lime pretreatment of poplar wood, part III: long-term.

Selectivity and delignification kinetics for oxidative and nonoxidative lime pretreatment of poplar wood, part III: long-term.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki