期刊
BIOMASS CONVERSION AND BIOREFINERY
卷 -, 期 -, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s13399-022-02381-9
关键词
Zirconium-lignin hybrid catalyst; Acid-base site; Cooperative effect; 5-Hydroxymethylfurfural; 2,5-Bis(hydroxymethyl)furan
资金
- Natural Science Foundation of Jiangsu Province [BK20190105, BK20191056, BK20201072]
- National Natural Science Foundation of China [22078123, 21908075, 22108091]
- Natural Science Foundation of the Higher Education Institutions of Jiangsu Province [18KJB416003, 19KJB220006]
- Natural Science Foundation of Huaian City [HAB202057]
- College Students' Innovative Entrepreneurial Training Plan Program of Jiangsu Province [202118009XJ]
- Qinglan Project of Jiangsu Province
In this study, a new zirconium-lignin hybrid catalyst (Zr-EL) was prepared using enzymatic hydrolysis lignin (EL) as a cheap organic ligand. The Zr-EL catalyst showed superior catalytic activity and stability for the MPV reduction of HMF to BHMF. Moreover, it also exhibited excellent applicability in converting various ketone and aldehyde compounds to alcohols.
The Meerwein-Ponndorf-Verley (MPV) reduction is an extremely attractive strategy for the selective hydrogenation of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-bis(hydroxymethyl)furan (BHMF) in which constructing a low-cost and high-efficiency catalyst is very essential and crucial. In this work, the enzymatic hydrolysis lignin (EL), which is a waste residue in the production process of lignocellulosic ethanol, was firstly and directly adopted as the cheap organic ligand to prepare a new zirconium-lignin hybrid catalyst (Zr-EL) by a simple solvothermal self-assembly method. Amazingly, Zr-EL displayed superior catalytic activity for the MPV reduction of HMF to BHMF, providing 98.9% yield with a high turnover frequency (TOF) of 10.86 h(-1) in 2-propanol (iPrOH) at 140 degrees C for 4 h. Intensive characterization and analysis results indicated that this superior catalytic activity of Zr-EL was principally attributed to the cooperative effects of Lewis acid-base sites (Zr4+-O2-) under the assistance of good hydrophilicity. Additionally, Zr-EL showed excellent catalytic stability, and when it was recovered and reused for five successive reaction cycles, an apparent loss in the yield of BHMF was not observed. More meaningfully, Zr-EL also exhibited outstanding applicability, allowing it to convert various ketone and aldehyde compounds to the corresponding alcohol products with satisfactory yields in iPrOH via MPV reduction. Conclusively, this work presents a newfangled idea to utilize the low-rank biorefinery residues and construct more practical zirconium-based catalysts for the selective synthesis of high-value chemicals.
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