Mechanocatalytic Synergy for Expedited Cellulosic Ethanol Production Compatible with Integrated Biorefinery

被引:10
作者
Liu, Xiumei [1 ]
Liu, Huifang [1 ]
Yan, Peifang [1 ]
Mao, Liaoyuan [1 ]
Xu, Zhanwei [1 ]
Zhang, Zongchao Conrad [1 ]
机构
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China
基金
中国国家自然科学基金;
关键词
Biomass; Cellulose; P2O5; Hydrolysis; Fermentable glucose; Cellulosic ethanol; Integrated conversion; NONENZYMATIC SUGAR PRODUCTION; ONE-POT SYNTHESIS; LIGNOCELLULOSIC BIOMASS; LEVULINIC ACID; CONVERSION; GLUCOSE; DEPOLYMERIZATION; LIGNIN; YIELD;
D O I
10.1021/acssuschemeng.9b06018
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Developing economically viable cellulosic ethanol process requires concentrated fermentable sugars and minimum water consumption. Biorefinery economics requires highly integrated efficiencies in the full utilization of all biomass components. Toward this objective, we have developed an enzyme-free mechanocatalytic saccharification process that combines mix-milling of P2O5 with lignocelluloses and successive hydrolysis into fermentable sugars. Demonstrated with corn stover (CS) and CS-xylose residues, after recovery of valuable hemicellulose, fermentable glucose in 75% yield at a high biomass loading (92 mg/mL) was obtained with concomitant precipitation of pristine lignin. The undetoxified concentrated hydrolysate allows for fermentative upgrading, achieving 42 g/L ethanol (a benchmark (40g/L) for an economically feasible bioethanol process) in 52 h after hemicellulose is converted into xylose. P2O5 is essential in fragmentation of cellulose in the milling stage and subsequent accelerated hydrolysis to glucose by in situ produced H3PO4. The mechanocatalytic saccharification of biomass involving P2O5 is compatible with xylose and lignin recovery and facilitates the integrated conversion of all three biomass fractions.
引用
收藏
页码:2399 / 2408
页数:19
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