Effect of Water Vapour on the Acidity of ZSM-5 Zeolite Used for Catalytic Cracking of Naphtha to Manufacture Ethylene and Propylene

Effect of Water Vapour on the Acidity of ZSM-5 Zeolite Used for Catalytic Cracking of Naphtha to Manufacture Ethylene and Propylene

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摘要 The change in acidity of the ZSM-5 zeolite was investigated after it was treated with water vapour, and its capability on ammonia adsorption was also studied after having adsorbed water vapour. The effect of water vapour on products distribution was studied during catalytic cracking of naphtha, the changes in the adsorption ability and catalytic performance of the ZSM-5 zeolite was investigated after the catalyst was loaded with phosphorus species. These results all indicated that water vapour could reduce the acid strength and acid density of ZSM-5 zeolite and affect the capability of ZSM-5 on adsorption of gases, therefore the activated energy contributed by the ZSM-5 zeolite to the catalytic cracking reaction would be low to prevent the feedstock from deepened catalytic cracking and coke formation.

作者 Ma Guangwei Xiao Jingxian ZhangHuining Xie Zaiku

机构地区 Shanghai Research Institute of Petrochemical Technology

出处《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2008年第4期33-39,共7页 中国炼油与石油化工（英文版）

基金 the Natural 973 Project(No.2003CB615804) the joint funding of National Natural Science Foundation of China and SINOPEC(No.20736011)

关键词 water vapor ACIDITY catalytic cracking ETHYLENE PROPYLENE 催化裂化催化剂炼油工艺乙烯丙烯

分类号 TE624 [石油与天然气工程—油气加工工程] TE624.9 [石油与天然气工程—油气加工工程]

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Effect of Water Vapour on the Acidity of ZSM-5 Zeolite Used for Catalytic Cracking of Naphtha to Manufacture Ethylene and Propylene

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