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One-pot chemocatalytic transformation of cellulose to ethanol over Ru-WOx/HZSM-5

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Abstract

Chemocatalytic production of bioethanol from cellulosic biomass is significant for both low-carbon energy development and greenhouse gas control. In this work, a multifunctional Ru-WOx/HZSM-5 catalyst was designed and prepared for the one-pot efficient transformation of cellulose and raw biomass (bagasse and corn stalk) to bioethanol via a series of cascade reactions. Addition of Ru/WOx, which could promote the retro-aldol condensation reaction but not oligomerization, led to a 87.5% yield of ethanol from 1 wt% cellulose under mild conditions (235 °C, 3 MPa H2, in water). Further combining a two-stage heating strategy for high concentration feedstock conversion achieved a 53.7% yield of ethanol from 5 wt% cellulose. Characterization studies revealed a highly dispersed Ru3W17 alloy along with moderate acid sites that displayed a synergistic catalytic effect. The catalytic system can be regulated to promote hydrolysis, retro-aldol condensation, dehydration and hydrogenation to achieve ethanol and suppress side reactions such as oligomerization to form humins.

Graphical abstract: One-pot chemocatalytic transformation of cellulose to ethanol over Ru-WOx/HZSM-5

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Publication details

The article was received on 27 Feb 2019, accepted on 23 Mar 2019 and first published on 25 Mar 2019


Article type: Communication
DOI: 10.1039/C9GC00719A
Citation: Green Chem., 2019, Advance Article

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    One-pot chemocatalytic transformation of cellulose to ethanol over Ru-WOx/HZSM-5

    C. Li, G. Xu, C. Wang, L. Ma, Y. Qiao, Y. Zhang and Y. Fu, Green Chem., 2019, Advance Article , DOI: 10.1039/C9GC00719A

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