FCC催化剂酸性与孔结构对焦炭选择性的影响  

Influence of the acidity and pore structure of FCC catalysts on coke selectivity

作　　者：李荻[1] 谭争国[1] 张海涛[1] 郑云锋[1] 

机构地区：[1]中国石油天然气股份有限公司兰州化工研究中心,甘肃兰州730060

出　　处：《工业催化》2013年第4期49-52,共4页Industrial Catalysis

基　　金：中国石油天然气股份有限公司科技管理部资助项目(2011B-2404-0102)

摘　　要：分别制备酸性和孔体积不同的催化剂,并通过红外光谱、N2吸附和ACE评价等方法,考察B酸与L酸的调变以及催化剂孔体积的变化对焦炭选择性的影响。结果表明,催化剂B酸量增加,L酸量在一定范围适度减少,均有利于焦炭选择性的提高;催化剂孔体积低于0.39 mL.g-1时,随着孔体积增加,生焦因子呈降低趋势;孔体积高于0.39 mL.g-1时,由孔体积增加带来焦炭选择性的优势便无法体现。The catalysts with different acidity and pore volume were prepared, and the effects of the adjustment of BriSnsted acid and Lewis acid, and pore volume change of the catalysts on coke selectivity were investigated by means of infrared spectroscopy, N2 absorption and ACE response evaluation method. The experimental results showed that the increase of Bronsted acid content and the appropriate decrease of Lewis acid content were advantageous to the enhancement of coke selectivity;when the pore volume was less than 0.39 mL·g^-1,the coke factor reduced with the increase of pore volume ;when the pore volume was more than 0.39 mL·g^-1, the advantage of coke selectivity brought by the increase of pore volume was not observed.

关 键 词：催化剂工程 FCC催化剂 酸性 B酸 L酸 孔体积 

分 类 号：TQ426.6[化学工程] TE624.9[石油与天然气工程—油气加工工程]