糠醛转化为燃料化合物的双功能催化剂研究进展

Research progress on bifunctional catalysts for conversion of furfural into fuel compounds

以生物质为原料制备燃料化合物对减少化石能源的依赖和构建绿色能源结构具有重要意义。生物质平台化合物糠醛经多步串联反应可得到乙酰丙酸、乙酰丙酸酯、γ-戊内酯、2-甲基呋喃等高附加值燃料化合物,一锅法合成避免了中间产物的分离、缩短了工艺流程。近年来,高效催化糠醛一锅转化为燃料化合物的双、多功能催化剂得到快速发展。该文介绍了高效催化糠醛一锅转化为乙酰丙酸、乙酰丙酸酯、γ-戊内酯、2-甲基呋喃的反应机理和路线;归纳了不同产物所需高效双功能催化剂体系,并探讨了催化剂的活性位点、空间结构、溶剂、氢供体等因素对反应的影响;最后,提出双功能催化剂未来的发展方向。

Preparation of fuel compounds from biomass is of great significance in reducing the dependence on fossil energy and constructing green energy structure.High value-added fuel compounds such as levulinic acid,levulinate,γ-valerolactone and 2-methylfuran can be obtained by multi-step tandem reaction of biomass platform compound fural,with the one-pot synthesis bypassing the separation of intermediate products and shortening the process flow.In recent years,dual-and multi-functional catalysts for the conversion of furfural into high value-added fuel compounds have been developed rapidly.Here,the mechanism and route of highly efficient catalytic conversion of furfural into levulinic acid,levulinate,γ-valerolactone and 2-methylfuran were reviewed.The efficient bifunctional catalyst systems required for different products was then summarized.The affecting factors on the reaction such as active site,spatial structure,solvent and hydrogen donor of catalyst were further discussed.Finally,the future development direction of bifunctional catalysts was proposed.