1,4-丁二醇脱氢和糠醛加氢耦合一体化Cu-Zn-Al催化剂的研究

Cu-Zn-Al catalysts for coupling reaction of 1,4-butanediol dehydrogenation and furfural hydrogenation

常压气相条件下,在不同铝源制备的Cu-Zn-Al沉淀催化剂上考察了1,4-丁二醇脱氢和糠醛加氢耦合一体化反应的性能,同时还考察了焙烧温度对催化剂性能的影响。以氧化铝溶胶为铝源的催化剂具有最优的催化性能;适中的焙烧温度(350℃)处理的催化剂呈现高的γ-丁内酯和2-甲基呋喃的选择性,低的温度不利于催化剂前驱体的完全分解,而过高的温度会大大减小催化剂的比表面,导致选择性降低。

A probe of the coupling process of the dehydrogenation of 1,4-butanediol (EDO) and the hydrogenation of furfural on precipitated Cu-Zn-Al catalysts which was prepared with different aluminum sources was carried out at atmospheric pressure in gas phase, and the effect of calcination temperature on the performance of catalysts was also studied. The results show that a catalyst prepared from alumina sol source presents the optimal catalytic performance and the calcination temperature has significant effect on catalytic performance, and a catalyst with medium calcination temperature of 350°C presents the highest selectivity of both γ-butyrolactone (86.0%) and 2-methylfuran (93.0%). Lower temperature cannot facilitate the precursor to complete decomposition and higher calcination temperature will decline the surface area of the catalyst, which will finally decline the yield of desired products.