摘要
采用吡啶吸附红外表征分析了不同N2预处理条件对Re2O7/Al2O3催化剂酸性的影响,进而考察了催化剂的丁烯歧化制丙烯性能。结果表明:随着N2预处理时间的延长,催化剂的L酸量明显增加,同时引起了初始阶段异构化活性的增加和催化剂寿命的延长。歧化反应需要催化剂酸性和歧化活性适宜的匹配。
Effects of N2 pretreatment on acidity and catalytic performance of Re2O7/Al2O3 for the conversion of butene to propylene were investigated by infrared absorption spectrum of pyridine adsorption. The experimental results showed that the amount of Lewis acid site of the catalyst increased with the nitrogen-pretreating time and therefore so did the isomerization activity of the catalyst. The catalyst life was prolonged with the nitrogen-pretreating time because of more Lewis acid sites of the catalyst. A good cata-lyst should have its metathesis activity mach with the isomerization activity.
出处
《石油与天然气化工》
CAS
CSCD
2010年第4期277-280,共4页
Chemical engineering of oil & gas
基金
中国石油天然气集团公司科技创新基金项目(2009D-5006-05-02)
中国石油化工股份有限公司九江分公司项目
