An electrogenerated base for the alkaline oxidative pretreatment of lignocellulosic biomass to produce bioethanol

Liu, Tongjun; Li, Zhenglong

doi:10.1039/C7RA08101D

Title: An electrogenerated base for the alkaline oxidative pretreatment of lignocellulosic biomass to produce bioethanol

Journal Article · Mon Oct 09 00:00:00 EDT 2017 · RSC Advances

DOI:https://doi.org/10.1039/C7RA08101D· OSTI ID:1471884

^[1]; Li, Zhenglong ^[2]

Qilu Univ. of Technology, Jinan (China). Dept. of Bioengineering
Michigan State Univ., East Lansing, MI (United States). Dept. of Chemical Engineering and Materials Science. Dept. of Biosystems and Agricultural Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In this study, we aimed to develop an alternative base to substitute for NaOH for use in alkaline oxidative biomass pretreatment. An electrogenerated base (EGB) from water electrolysis was employed in the alkaline oxidative pretreatment of corn stover (CS). Similar to NaOH, when the EGB was used in pretreatment, 56.6% of the original lignin was removed after 6 h pretreatment, leading to significantly enhanced enzymatic digestibility. The glucan digestibility of the pretreated CS was 3.8 times higher than that of raw CS after 24 h. The ethanol metabolic yields were 64.6% and 72.4% when using activated carbon detoxified hydrolysate or hydrolysate at pH 5.5, respectively. These results demonstrate that an EGB, a byproduct from various electrocatalytic processes, could be used as a potential replacement for NaOH. Moreover, we propose a new biorefinery concept, which combines water electrolysis, biological conversion and thermochemical/catalytic conversion to produce bioethanol, hydrogen, hydrocarbon fuels and valuable chemicals.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Qilu Univ. of Technology, Jinan (China)

Sponsoring Organization:: USDOE; Natural Science Foundation of Shandong Province (China); Major Research & Development Program of Shandong Province (China)

Grant/Contract Number:: AC05-00OR22725; ZR2014BM031; 2015GSF121022

OSTI ID:: 1471884

Journal Information:: RSC Advances, Vol. 7, Issue 75; ISSN 2046-2069

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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