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Sökning: WFRF:(Luo L.) > (2015-2019) > Luleå tekniska universitet > Integrated Two-Stag...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004696naa a2200397 4500
001oai:DiVA.org:ltu-76145
003SwePub
008190927s2019 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-761452 URI
0247 a https://doi.org/10.1021/acs.iecr.9b011242 DOI
040 a (SwePub)ltu
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Singh, Sandip K.u Chemical & Biological Engineering Department, Montana State University, Bozeman, Montana, United States4 aut
2451 0a Integrated Two-Stage Alkaline-Oxidative Pretreatment of Hybrid Poplar. Part 1 :b Impact of Alkaline Pre-Extraction Conditions on Process Performance and Lignin Properties
264 c 2019-06-05
264 1b American Chemical Society (ACS),c 2019
338 a print2 rdacarrier
500 a Validerad;2019;Nivå 2;2019-09-27 (johcin)
520 a We previously demonstrated that a two-stage pretreatment comprising of an alkaline pre-extraction followed by a Cu-catalyzed alkaline–oxidative treatment is effective at pretreating hardwoods under relatively mild reaction conditions. In this work, we focus on characterizing how biomass source and reaction conditions used during the alkaline pre-extraction impact the subsequent processing stages as well as lignin yields and properties. Specifically, three hybrid poplars were subjected to the first stage alkaline pre-extraction under various conditions including differences in time (15–300 min), temperature (95–155 °C), and alkali loadings (50–200 mg NaOH/g biomass), and the impact on total mass solubilization, lignin recovery, and lignin purity was determined. Empirical correlations were developed between reaction conditions and mass solubilization and lignin recovery during the pre-extraction stage. For select conditions, lignin properties were assessed and include β-O-4 content determined by 13C NMR, molecular mass distributions as determined by gel permeation chromatography, and susceptibility to depolymerization to aromatic monomers using thioacidolysis and formic acid catalyzed depolymerization. We found alkaline pre-extraction performed at higher temperatures generated lignins exhibiting lower contamination by polysaccharides, lower aromatic monomer yields from depolymerization, lower molar masses, and lower β-O-4 contents relative to the lower temperature pre-extractions. Finally, the pre-extracted biomass from select conditions was assessed for its response to the subsequent Cu-catalyzed alkaline–oxidative treatment and enzymatic hydrolysis. It was demonstrated that minor differences in delignification during pre-extraction have quantifiable impacts on the subsequent efficacy of the second stage of pretreatment and enzymatic hydrolysis with improved lignin removal during the first pre-extraction stage resulting in improved hydrolysis yields.
650 7a TEKNIK OCH TEKNOLOGIERx Industriell bioteknikx Bioprocessteknik0 (SwePub)209012 hsv//swe
650 7a ENGINEERING AND TECHNOLOGYx Industrial Biotechnologyx Bioprocess Technology0 (SwePub)209012 hsv//eng
653 a Biokemisk processteknik
653 a Biochemical Process Engineering
7001 a Savoy, Anthony W.u Chemical & Biological Engineering Department, Montana State University, Bozeman, Montana, United States4 aut
7001 a Yuan, Zhaoyangu Department of Biochemistry & Molecular Biology, Michigan State University, East Lansing, Michigan, United States4 aut
7001 a Luo, Haou Department of Chemistry, University of Wisconsin, Madison, Wisconsin, United States4 aut
7001 a Stahl, Shannon S.u Department of Chemistry, University of Wisconsin, Madison, Wisconsin, United States4 aut
7001 a Hegg, Eric L.u Department of Biochemistry & Molecular Biology, Michigan State University, East Lansing, Michigan, United States4 aut
7001 a Hodge, Davidu Luleå tekniska universitet,Industriell miljö- och processteknik,Chemical & Biological Engineering Department, Montana State University, Bozeman, Montana, United States4 aut0 (Swepub:ltu)davhod
7102 a Chemical & Biological Engineering Department, Montana State University, Bozeman, Montana, United Statesb Department of Biochemistry & Molecular Biology, Michigan State University, East Lansing, Michigan, United States4 org
7730 t Industrial & Engineering Chemistry Researchd : American Chemical Society (ACS)g 58:35, s. 15989-15999q 58:35<15989-15999x 0888-5885x 1520-5045
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76145
8564 8u https://doi.org/10.1021/acs.iecr.9b01124

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