The effect of alkaline pretreatment methods on cellulose structure and accessibility.
Identifieur interne : 001B08 ( Main/Exploration ); précédent : 001B07; suivant : 001B09The effect of alkaline pretreatment methods on cellulose structure and accessibility.
Auteurs : Garima Bali ; Xianzhi Meng ; Jacob I. Deneff ; Qining Sun ; Arthur J. RagauskasSource :
- ChemSusChem [ 1864-564X ] ; 2015.
Descripteurs français
- KwdFr :
- Adsorption (MeSH), Agents colorants (composition chimique), Ammoniac (composition chimique), Cellulose (composition chimique), Composés du calcium (composition chimique), Concentration en ions d'hydrogène (MeSH), Glucose (composition chimique), Hydrolyse (MeSH), Oxydes (composition chimique), Populus (composition chimique).
- MESH :
- composition chimique : Agents colorants, Ammoniac, Cellulose, Composés du calcium, Glucose, Oxydes, Populus.
- Adsorption, Concentration en ions d'hydrogène, Hydrolyse.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Ammonia, Calcium Compounds, Cellulose, Coloring Agents, Glucose, Oxides.
- chemistry : Populus.
- Adsorption, Hydrogen-Ion Concentration, Hydrolysis.
Abstract
The effects of different alkaline pretreatments on cellulose structural features and accessibility are compared and correlated with the enzymatic hydrolysis of Populus. The pretreatments are shown to modify polysaccharides and lignin content to enhance the accessibility for cellulase enzymes. The highest increase in the cellulose accessibility was observed in dilute sodium hydroxide, followed by methods using ammonia soaking and lime (Ca(OH)2 ). The biggest increase of cellulose accessibility occurs during the first 10 min of pretreatment, with further increases at a slower rate as severity increases. Low temperature ammonia soaking at longer residence times dissolved a major portion of hemicellulose and exhibited higher cellulose accessibility than high temperature soaking. Moreover, the most significant reduction of degree of polymerization (DP) occurred for dilute sodium hydroxide (NaOH) and ammonia pretreated Populus samples. The study thus identifies important cellulose structural features and relevant parameters related to biomass recalcitrance.
DOI: 10.1002/cssc.201402752
PubMed: 25421020
Affiliations:
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Deneff</name></author><author><name sortKey="Sun, Qining" sort="Sun, Qining" uniqKey="Sun Q" first="Qining" last="Sun">Qining Sun</name></author><author><name sortKey="Ragauskas, Arthur J" sort="Ragauskas, Arthur J" uniqKey="Ragauskas A" first="Arthur J" last="Ragauskas">Arthur J. 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The pretreatments are shown to modify polysaccharides and lignin content to enhance the accessibility for cellulase enzymes. The highest increase in the cellulose accessibility was observed in dilute sodium hydroxide, followed by methods using ammonia soaking and lime (Ca(OH)2 ). The biggest increase of cellulose accessibility occurs during the first 10 min of pretreatment, with further increases at a slower rate as severity increases. Low temperature ammonia soaking at longer residence times dissolved a major portion of hemicellulose and exhibited higher cellulose accessibility than high temperature soaking. Moreover, the most significant reduction of degree of polymerization (DP) occurred for dilute sodium hydroxide (NaOH) and ammonia pretreated Populus samples. The study thus identifies important cellulose structural features and relevant parameters related to biomass recalcitrance.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">25421020</PMID><DateCompleted><Year>2015</Year><Month>09</Month><Day>29</Day></DateCompleted><DateRevised><Year>2015</Year><Month>02</Month><Day>02</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1864-564X</ISSN><JournalIssue CitedMedium="Internet"><Volume>8</Volume><Issue>2</Issue><PubDate><Year>2015</Year><Month>Jan</Month></PubDate></JournalIssue><Title>ChemSusChem</Title><ISOAbbreviation>ChemSusChem</ISOAbbreviation></Journal><ArticleTitle>The effect of alkaline pretreatment methods on cellulose structure and accessibility.</ArticleTitle><Pagination><MedlinePgn>275-9</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1002/cssc.201402752</ELocationID><Abstract><AbstractText>The effects of different alkaline pretreatments on cellulose structural features and accessibility are compared and correlated with the enzymatic hydrolysis of Populus. The pretreatments are shown to modify polysaccharides and lignin content to enhance the accessibility for cellulase enzymes. The highest increase in the cellulose accessibility was observed in dilute sodium hydroxide, followed by methods using ammonia soaking and lime (Ca(OH)2 ). The biggest increase of cellulose accessibility occurs during the first 10 min of pretreatment, with further increases at a slower rate as severity increases. Low temperature ammonia soaking at longer residence times dissolved a major portion of hemicellulose and exhibited higher cellulose accessibility than high temperature soaking. Moreover, the most significant reduction of degree of polymerization (DP) occurred for dilute sodium hydroxide (NaOH) and ammonia pretreated Populus samples. The study thus identifies important cellulose structural features and relevant parameters related to biomass recalcitrance.</AbstractText><CopyrightInformation>© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Bali</LastName><ForeName>Garima</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>Institute of Paper Science and Technology, School of Chemistry and Biochemistry, Georgia Institute of Technology, 500, 10th St. NW, Atlanta, GA-30332-0620 (USA).</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Meng</LastName><ForeName>Xianzhi</ForeName><Initials>X</Initials></Author><Author ValidYN="Y"><LastName>Deneff</LastName><ForeName>Jacob I</ForeName><Initials>JI</Initials></Author><Author ValidYN="Y"><LastName>Sun</LastName><ForeName>Qining</ForeName><Initials>Q</Initials></Author><Author ValidYN="Y"><LastName>Ragauskas</LastName><ForeName>Arthur J</ForeName><Initials>AJ</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, 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MajorTopicYN="N">cellulose</Keyword><Keyword MajorTopicYN="N">crystallinity</Keyword><Keyword MajorTopicYN="N">enzyme catalysis</Keyword><Keyword MajorTopicYN="N">hydrolysis</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2014</Year><Month>07</Month><Day>25</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2014</Year><Month>09</Month><Day>30</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>11</Month><Day>26</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>11</Month><Day>26</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2015</Year><Month>9</Month><Day>30</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">25421020</ArticleId><ArticleId IdType="doi">10.1002/cssc.201402752</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list></list><tree><noCountry><name sortKey="Bali, Garima" sort="Bali, Garima" uniqKey="Bali G" first="Garima" last="Bali">Garima Bali</name><name sortKey="Deneff, Jacob I" sort="Deneff, Jacob I" uniqKey="Deneff J" first="Jacob I" last="Deneff">Jacob I. Deneff</name><name sortKey="Meng, Xianzhi" sort="Meng, Xianzhi" uniqKey="Meng X" first="Xianzhi" last="Meng">Xianzhi Meng</name><name sortKey="Ragauskas, Arthur J" sort="Ragauskas, Arthur J" uniqKey="Ragauskas A" first="Arthur J" last="Ragauskas">Arthur J. Ragauskas</name><name sortKey="Sun, Qining" sort="Sun, Qining" uniqKey="Sun Q" first="Qining" last="Sun">Qining Sun</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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