摘要
为了提高环己烯的选择性,以铝溶胶为前躯体,采用共沉淀法制备了Al2O3-ZrO2复合载体。以氯化钌为前躯体,硼氢化钠化学还原法分别制备了Ru-Zn-B/Al2O3和Ru-Zn-B/Al2O3-ZrO2催化剂,并对这两种催化剂进行了苯选择性加氢评价研究。结果表明:ZrO2的引入显著提高了环己烯选择性,当Zr与Al物质的量比为0.1时。环己烯选择性最高。载体的焙烧温度对苯选择加氢的选择性和活性有重要影响,最佳焙烧温度为600℃。
For increasing selectivity of cyclohexene in the selective hydrogenation of benzene Al2O3-ZrO2 composite carrier was first prepared by a coprecipitation method using aluminum sol as a precursor and then Ru-Zn-B/Al2O3 and Ru-Zn-B/Al2O3-ZrO2 catalysts were prapared by sodium borohydride chemical reduction method using RuCl3 as a precursor. The performance of two catalysts was evaluated by selective hydrogenation of benzene in autoclave reactor. The results showed that ZrO2 was favorable to increase the selectivity of cyclohexene on Ru-Zn-B/Al2O3 catalyst obviously, the highest selectivity of cyclohexene occured when the Zr/Al atomic ratio was 0.1. Calcining temperature of carrier had important effect on cyclohexene selectivity. The optimal calcination temperature was 600 ℃.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2014年第2期128-132,共5页
Chemical Reaction Engineering and Technology
基金
国家自然科学基金(20806093)
关键词
苯
环己烯
加氢
钌
氧化铝/氧化锆复合载体
benzene
cyclohexene
hydrogenation
ruthenium
alumina/zirconia complex support