天然气化工2012，Vol.37Issue(3)：5-9,13,6.
一氧化碳和乙醇酸甲酯对草酸二甲酯加氢制备乙二醇Cu/SiO2催化剂的影响
Effects of CO and methyl glycolate on hydrogenation of dimethyl oxalate to ethyl glycol over Cu/SiO2 catalysts
张素华 1张博 1惠胜国 1李伟1
作者信息
- 1. 华东理工大学 化学工程国家重点实验室,上海200237
- 折叠
摘要
Abstract
Effects of CO and methyl glycolate (MC) on hydrogenation of dimethyl oxalate to ethyl glycol over Cu/SiO2 catalysis were studied. CO in the gas phase had great influence on the catalytic activity, and the yield of ethylene glycol (EG) decreased from 95.6 % to 2S.4 % after CO was introduced to the reaction system. The effect of CO was reversible, and the activity of the catalyst could be recovered to the same extent as before CO being introduced after feeding was stopped and the system was purged by Hi for 20 hours. The catalytic activity was also affected by MG concentration, feeding way and reaction temperature. Comparing with higher temperature (200%), at lower temperature (195%) catalytic activity decreased more sharply after MG pre-adsorption. The yield of EG decreased to 23.7% at 35 hours time on stream when the catalyst was pre-adsorbed with MG methanol solution (ichc=20%) for 7 hours before reaction. MG desorption from the catalyst surface was very difficult, and the polymer might be formed which could block the pores of catalyst and result in the deactivation of catalyst when the catalyst worked at high concentration of MG for a long time.关键词
一氧化碳/乙醇酸甲酯/Cu/SiO2催化剂/失活/草酸二甲酯/加氢/乙二醇Key words
carbon monoxide/methyl glycolate/Cu/SiO/catalyst/deactivation/dimethyl oxalate/hydrogenation/ethylene glycol分类
化学化工引用本文复制引用
张素华,张博,惠胜国,李伟..一氧化碳和乙醇酸甲酯对草酸二甲酯加氢制备乙二醇Cu/SiO2催化剂的影响[J].天然气化工,2012,37(3):5-9,13,6.
