Combinatorial modification and catalytic performance of ZSM-5 zeolite by phosphorus and aluminum

被引：0

作者：

Li X. ^{[1
]}

Zheng Q. ^{[1
]}

Mi S. ^{[1
]}

Shen B. ^{[1
]}

机构：

[1] State Key Laboratory of Heavy Oil Processing, The Key Laboratory of Catalysis of CNPC, China University of Petroleum, Beijing

来源：

Huagong Xuebao/CIESC Journal | 2016年 / 67卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Acidity; Catalysis; Composites; Hydrothermal; Phosphorus and aluminum combined modification; ZSM-5; zeolite;

D O I：

10.11949/j.issn.0438-1157.20160368

中图分类号：

学科分类号：

摘要：

ZSM-5 zeolite, one of the important shape selective catalysts with high molar ratio of silica to alumina, possesses strong acidity and excellent thermal and hydrothermal stability. The acidity and pore structure of ZSM-5 zeolite were adjusted by combinatorially modifying ZSM-5 molecular sieves with phosphorus and aluminum. Results showed lamellar-structured phosphorus and aluminum deposits on the surface of ZSM-5 zeolite at greater than 10% (mass) load of phosphorus and aluminum, which increased its acidity and formed new mesopores about 10 nm in diameter. Such highly acidic porous structures significantly increased the conversion of n-octane and the propylene yield by more than 20%. When used in catalytic cracking of heavy oil, the yield of oil residual and coke was decreased but the yield of propylene was increased by 1%. © All Right Reserved.

引用

页码：3357 / 3362

页数：5

共 26 条

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