Effects of large pore zeolite additions in the catalytic pyrolysis catalyst on the light olefins production
Effects of large pore zeolite additions in the catalytic pyrolysis catalyst on the light olefins production
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DOI：
10.1016/j.cattod.2007.03.021
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发表时间：
2007-07-30
期刊：
影响因子：
5.3
通讯作者：
Gao, Jinsen
中科院分区：
文献类型：
--
作者：
Li, Xianfeng;Shen, Baojian;Gao, Jinsen
为提高重油催化裂解催化剂的低碳烯烃选择性，以大庆重油和正癸烯/正癸烷为原料，在625 ℃微活性试验装置上考察了大孔分子筛对催化裂解催化剂低碳烯烃（乙烯和丙烯）选择性的影响。以稀土超稳Y、HP和四种不同孔径分布的碱处理HP作为大孔沸石组分。随着大孔沸石添加量的增加，C2-C3低碳烯烃的产率呈火山式增长趋势。当使用ZSM-5和RE-USY或ZSM-5和碱处理HP的最佳组合时，它们分别达到24.5和26.7wt%。此外，增大大孔沸石的孔径也能提高低碳烯烃的产率，当H β沸石的总孔容为0.452 cm（3）g（-1）时，乙烯和丙烯的总产率最高可达26.7wt%。(C)2007 Elsevier B. V.保留所有权利。
To increase the light olefins selectivity of catalytic pyrolysis catalyst for heavy oil processing, the effects of large pore zeolite additions on the selectivity to light olefins (ethylene and propylene) were studied in a micro-activity test (MAT) unit at 625 degrees C by using Daqing heavy oil and n-decene/n-decane as feedstocks. Rare earth containing ultra-stable Y, HP and four types of alkali-treated HP with different pore size distributions were employed as the large pore zeolite components. The yields Of C-2-C-3 light olefins showed a volcano trend with the increasing amount of large pore zeolite additions. They reached up to 24.5 and 26.7 wt%, respectively, when an optimum combination of zeolites ZSM-5 and RE-USY or ZSM-5 and alkali-treated HP was used. Moreover, increasing the pore size of large pore zeolites also led to the increases in the yields of light olefins, the maximum total yields of ethylene and propylene reached up to 26.7 wt% when the total pore volume of the zeolite H beta added was 0.452 cm(3) g(-1). (C) 2007 Elsevier B.V. All rights reserved.