摘要
考察了SiO2、γ-Al2O3和SiO2-Al2O3载体负载氧化钨作为催化剂用于乙酸乙酯合成反应研究,并通过XRD、氮气物理吸附、Raman和NH3-TPD对催化剂进行表征。结果表明,氧化钨负载在SiO2-Al2O3载体上,具有更强的酸性和更高的酸量,有利于促进乙酸乙酯合成反应进行。当W在SiO2-Al2O3载体表面的负载量为8%(质量分数,下同)时,乙酸转化率最高可以达到69.7%,载体表面WO3晶体颗粒不利于提高酯化反应活性。
A series of catalysts made of tungsten oxide loaded on SiO2, T-AlE 03 , and SiO2-Al2O3 were tested for esterification of acetic acid with ethanol. The catalysts were studied in detail by characterization of XRD, nitrogen adsorption measurement, Raman and NHz-TPD. The results indicate that tungsten oxide supported on SiO2-Al2O3 lead to the stronger and more acid sites,which appeared to be more effective for esterification of acetic acid with ethanol. Among these catalysts, the catalyst of SiO2-Al2O3 supporting 8.0% tungsten exhibited the highest activity for esterification of acetic acid with ethanol reaction,with the conversion of acetic acid being up to 69.7%. Bulky crystalline WO3 loaded on SiO2-Al2O3 was to the disadvantage of improving the activity of esterification.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2014年第5期581-585,共5页
Fine Chemicals
基金
国家自然科学基金(51174279
21306148)
国家级大学生创新创业训练计划项目(S12031)
陕西省教育厅专项科研计划项目(11JK0595)~~
