低碳化学与化工2025，Vol.50Issue(7)：38-44,57,8.DOI:10.12434/j.issn.2097-2547.20240338
SiO2助剂对铜基催化剂上辛烯醛加氢制辛醇反应副产物选择性的影响
Effects of SiO2 promoters on by-products selectivity in 2-ethyl-2-hexenal hydrogenation to 2-ethylhexanol over Cu-based catalysts
刘洁 1孙远龙 2李婷婷 2于杨 2李忠于 2郭学锋3
作者信息
- 1. 南京大学 化学化工学院 介观化学教育部重点实验室,江苏 南京 210023||中石化南京化工研究院有限公司,江苏 南京 210048
- 2. 中石化南京化工研究院有限公司,江苏 南京 210048
- 3. 南京大学 化学化工学院 介观化学教育部重点实验室,江苏 南京 210023
- 折叠
摘要
Abstract
Gas phase hydrogenation of 2-ethyl-2-hexenal is the main method for industrial production of 2-ethylhexanol(hereinafter referred to as"octanol").The type and selectivity of by-products in the process have direct impacts on the quality and yield of octanol.To achieve a highly active catalyst and control the selectivity of by-products,copper(Cu)-based catalysts were prepared and modified with SiO2 as the promoter.The catalytic performances of obtained catalysts(N-1,N-2 and N-3)for gas phase hydrogenation of 2-ethyl-2-hexenal were measured and the structures of the catalysts were analyzed by XRD,N2 adsorption/desorption,XPS,TEM,NH3-TPD,Py-IR,etc.The results show that the hydrogenation activities of the catalysts are related to the dispersions of CuO and the amounts of Lewis acid in the catalysts.Under the reaction conditions of inlet temperature of 150℃,pressure of 0.4 MPa and 2-ethyl-2-hexenal liquid space velocity of 0.3 h-1,2-ethyl-2-hexenal conversion rate of 99.76%and octanol selectivity of 99.50%are achieved for N-1 with SiO2 content(mass fraction,the same below)of 0.The contents of partially hydrogenated by-products 2-ethylhexanal and 2-ethylhexenol in reaction products are 0.22%and 0.04%,respectively,and the content of heavy components is 1.06%.Modification of catalyst surface properties with SiO2 can regulate the selectivity of heavy components.N-2 with SiO2 content of 2%exhibits 2-ethyl-2-hexenal conversion rate of 99.49%and octanol selectivity of 99.40%,with the content of 2-ethylhexanal,2-ethylhexenol and heavy components of 0.28%,0.06%and 0.72%,respectively.During a total of ten months of industrial application verification,N-2 demonstrates superior catalytic performance with average contents of 2-ethylhexanal,octanol and heavy components of less than 0.01%,97.88%and 0.42%,respectively.关键词
辛烯醛加氢/铜基催化剂/2-乙基己醇/SiO2/副产物选择性Key words
2-ethyl-2-hexenal hydrogenation/Cu-based catalyst/2-ethylhexanol/SiO2/by-products selectivity分类
化学化工引用本文复制引用
刘洁,孙远龙,李婷婷,于杨,李忠于,郭学锋..SiO2助剂对铜基催化剂上辛烯醛加氢制辛醇反应副产物选择性的影响[J].低碳化学与化工,2025,50(7):38-44,57,8.
