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Catalytic valorization of hardwood for enhanced xylose-hydrolysate recovery and cellulose enzymatic efficiency via synergistic effect of Fe3+ and acetic acid

Biotechnology for biofuels, 2019-10, Vol.12 (1), p.248-248, Article 248

COPYRIGHT 2019 BioMed Central Ltd. ;COPYRIGHT 2019 BioMed Central Ltd. ;2019. This work is licensed under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;The Author(s) 2019 ;ISSN: 1754-6834 ;EISSN: 1754-6834 ;DOI: 10.1186/s13068-019-1587-4 ;PMID: 31636707

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Title:
Catalytic valorization of hardwood for enhanced xylose-hydrolysate recovery and cellulose enzymatic efficiency via synergistic effect of Fe3+ and acetic acid
Author: Huang, Kaixuan ; Das, Lalitendu ; Guo, Jianming ; Xu, Yong
Subjects: 09 BIOMASS FUELS ; Acetic acid ; Acetic acid catalysis ; Acids ; Biodegradation ; Biomass ; Biomass chemicals ; Biomass energy ; Biotechnology & Applied Microbiology ; By-products ; Catalysis ; Catalysts ; Cellulose ; Chemicals ; Composition ; Degradation ; Digital media ; Economic conditions ; Energy & Fuels ; Energy crops ; ENVIRONMENTAL SCIENCES ; Enzymatic saccharifcation of cellulose ; Enzymatic saccharification of cellulose ; Enzymes ; Fe3+-assisted hydrolysis ; Forestry ; Fractionation ; Fuel production ; Furfural ; Glucose ; Hemicellulose ; Hydrolysis ; Iron ; Laboratories ; Lewis acid ; Lignin ; Lignocellulose ; Monosaccharides ; Organic acids ; Organic chemistry ; Paper industry ; Polysaccharides ; Poplar ; Populus ; Pretreatment ; Production processes ; Pulp ; Saccharification ; Sawdust ; Structural stability ; Synergistic effect ; Vacuum distillation ; Wood ; Wood pulp industry ; Xylan ; Xylitol ; Xylose ; Xylose-hydrolysate recovery
Is Part Of: Biotechnology for biofuels, 2019-10, Vol.12 (1), p.248-248, Article 248
Description: Poplars are considered suitable dedicated energy crops, with abundant cellulose and hemicellulose, and huge surplus biomass potential in China. Xylan, the major hemicellulosic component, contributes to the structural stability of wood and represents a tremendous quantity of biobased chemicals for fuel production. Monomeric xylose conversion to value-added chemicals such as furfural, xylitol, and xylonic acid could greatly improve the economics of pulp-paper industry and biorefinery. Acetic acid (HAc) is used as a friendly and recyclable selective catalyst amenable to xylan degradation and xylooligosaccharides production from lignocellulosic materials. However, HAc catalyst usually works much feebly at inert woods than agricultural straws. In this study, effects of different iron species in HAc media on poplar xylan degradation were systematically compared, and a preferable Fe.sup.3+-assisted HAc hydrolysis process was proposed for comparable xylose-hydrolysate recovery (XHR) and enzymatic saccharification of cellulose. In presence of 6.5% HAc with 0.17-0.25 wt% Fe.sup.3+, xylose yield ranged between 72.5 and 73.9%. Additionally, pretreatment was effective in poplar delignification, with a lignin yield falling between 38.6 and 42.5%. Under similar conditions, saccharification efficiency varied between 60.3 and 65.9%. Starting with 100 g poplar biomass, a total amount of 12.7-12.8 g of xylose and 18.8-22.8 g of glucose were harvested from liquid streams during the whole process of Fe.sup.3+-HAc hydrolysis coupled with enzymatic saccharification. Furthermore, the enhancement mechanism of Fe.sup.3+ coupled with HAc was investigated after proof-of-concept experiments. Beechwood xylan and xylose were treated under the same condition as poplar sawdust fractionation, giving understanding of the effect of catalysts on the hydrolysis pathway from wood xylan to xylose and furfural by Fe.sup.3+-HAc. The Fe.sup.3+-assisted HAc hydrolysis process was demonstrated as an effective approach to the wood xylose and other monosaccharides production. Synergistic effect of Lewis acid site and aqueous acetic acid provided a promising strategy for catalytic valorization of poplar biomass.
Publisher: London: BioMed Central Ltd
Language: English
Identifier: ISSN: 1754-6834
EISSN: 1754-6834
DOI: 10.1186/s13068-019-1587-4
PMID: 31636707
Source: DOAJ Directory of Open Access Journals
GFMER Free Medical Journals
PubMed Central
ROAD: Directory of Open Access Scholarly Resources
ProQuest Central

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Catalytic valorization of hardwood for enhanced xylose-hydrolysate recovery and cellulose enzymatic efficiency via synergistic effect of Fe3+ and acetic acid

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