期刊
CHEMSUSCHEM
卷 11, 期 13, 页码 2114-2123出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201800455
关键词
biorefinery; biomass; molybdenum; supported catalysts; zinc
资金
- Fundamental Research Funds for the Central Universities [2017ZY25, 2018ZY01]
- National Natural Science Foundation of China [21776020, 21506013]
- National Program for Thousand Young Talents of China
- National Training Program of Innovation and Entrepreneurship for Undergraduates [201610022053]
Lignin is the largest renewable resource of bioaromatics, and the catalytic fragmentation of lignin into phenolic monomers is increasingly recognized as an important starting point for lignin valorization. Herein, we report that ZnMoO4 supported on MCM-41 can catalyze the fragmentation of biorefinery technical lignin, enzymatic mild acidolysis lignin, and native lignin derived from corncob to yield lignin oily products that contain 15-37.8wt% phenolic monomers, in which the high selectivities towards methyl coumarate (1) and methyl ferulate (2) were obtained (up to 78%). The effects of some key parameters such as the influence of the solvent, reaction temperature, time, H-2 pressure, and catalyst dosage were examined in view of activity and selectivity. The loss of Zn from the catalyst is discussed as the primary cause of deactivation, and the catalytic activity and selectivity can be well preserved in at least six runs by thermal calcination. The high selectivity to 1 and 2 leads to their easy separation and purification from lignin oily product to provide sustainable monomers for the preparation of functional polyether esters and polyesters.
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