低碳化学与化工2026，Vol.51Issue(5)：61-67,7.DOI:10.12434/j.issn.2097-2547.20250224
共沉淀法制备Ag-ZrO2-SiO2催化剂及其乙醇制丁二烯性能研究
Study on preparation of Ag-ZrO2-SiO2 catalysts by co-precipitation and their performances in ethanol-to-butadiene
摘要
Abstract
Developing novel ethanol-to-butadiene catalysts is essential for enabling alternatives to the traditional butadiene production route.A series of Ag-ZrO2-SiO2 catalysts were prepared using co-precipitation method,in which the Zr precursor concentration was controlled.The catalysts were characterized by XRD,SEM,N2 adsorption/desorption,ICP-OES and Py-IR.Their catalytic performances in ethanol-to-butadiene were evaluated in a fixed-bed reactor to investigate the influence of acidity regulation on catalytic performance.The results show that controlling the Zr precursor concentration optimizes both the amount and strength distribution of Lewis acid sites,which promotes the main C-C coupling reaction of acetaldehyde while suppressing the side reaction of ethanol dehydration to ethylene.Under reaction conditions of 420℃ and weight hourly space velocity of 0.3 h-1,the AZS-2 catalyst(prepared by ZrO(NO3)2 solution with mass fraction of 10％)exhibits the best catalytic performance,achieving an ethanol conversion rate of 80.0％and a butadiene selectivity of 47.3％.Its ethylene selectivity is notably lower than that of other catalysts.关键词
Ag-ZrO2-SiO2催化剂/共沉淀法/乙醇制丁二烯/Lewis酸调控Key words
Ag-ZrO2-SiO2 catalysts/co-precipitation method/ethanol-to-butadiene/Lewis acid regulation分类
化学化工引用本文复制引用
柳蒙蒙,余淦,贾伯阳,黄明真,崔燕冉,陈亚松..共沉淀法制备Ag-ZrO2-SiO2催化剂及其乙醇制丁二烯性能研究[J].低碳化学与化工,2026,51(5):61-67,7.基金项目
中国长江三峡集团有限公司科研项目(NBWL202200489). （NBWL202200489）
