Effect of Alkali Treatment on the Structure and Catalytic Properties of ZSM-5 Zeolite

引用本文: Zi Yun LI, Xin SUN, Qiang XIAO, Shou He XIANG. Effect of Alkali Treatment on the Structure and Catalytic Properties of ZSM-5 Zeolite[J]. Chinese Chemical Letters, 2005, 16(1): 115-118. shu

Citation: Zi Yun LI, Xin SUN, Qiang XIAO, Shou He XIANG. Effect of Alkali Treatment on the Structure and Catalytic Properties of ZSM-5 Zeolite[J]. Chinese Chemical Letters, 2005, 16(1): 115-118. shu

Effect of Alkali Treatment on the Structure and Catalytic Properties of ZSM-5 Zeolite

College of Chemistry, Nankai University, Tianjin 300071
基金项目:
Supported by the NSF of China (Grant No. 20233030) and Catalytic Key Laboratory of China Petroleum and Natural Gas Group Corporation (University of Petroleum)

摘要: Catalytic properties of ZSM-5 zeolite samples pretreated with NaOH solution have been investigated. The samples are characterized by XRD, SEM, chemical analysis, and N₂ adsorption.The results indicate that mesopores are created in ZSM-5 crystals under alkali treatment without change the microporous structure and acidic strength of the zeolite, but the crystallinity is greatly decreased under severe treatment. IR indicates that the concentration of silanol is greatly enriched by alkali treatment. The etherification activities of ZSM-5 zeolites are greatly increased by alkali-treatment. The noticeably improved catalytic activity of treated samples is ascribed to the formation of mesopores and greatly enriched silanol group.

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English

Effect of Alkali Treatment on the Structure and Catalytic Properties of ZSM-5 Zeolite

College of Chemistry, Nankai University, Tianjin 300071
Received Date: 12 December 2003
Fund Project:
Supported by the NSF of China (Grant No. 20233030) and Catalytic Key Laboratory of China Petroleum and Natural Gas Group Corporation (University of Petroleum)

Abstract: Catalytic properties of ZSM-5 zeolite samples pretreated with NaOH solution have been investigated. The samples are characterized by XRD, SEM, chemical analysis, and N₂ adsorption.The results indicate that mesopores are created in ZSM-5 crystals under alkali treatment without change the microporous structure and acidic strength of the zeolite, but the crystallinity is greatly decreased under severe treatment. IR indicates that the concentration of silanol is greatly enriched by alkali treatment. The etherification activities of ZSM-5 zeolites are greatly increased by alkali-treatment. The noticeably improved catalytic activity of treated samples is ascribed to the formation of mesopores and greatly enriched silanol group.

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Effect of Alkali Treatment on the Structure and Catalytic Properties of ZSM-5 Zeolite

English

Effect of Alkali Treatment on the Structure and Catalytic Properties of ZSM-5 Zeolite

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Effect of Alkali Treatment on the Structure and Catalytic Properties of ZSM-5 Zeolite

English

Effect of Alkali Treatment on the Structure and Catalytic Properties of ZSM-5 Zeolite

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