Preparation and characterization of Beta/MCM-41composite zeolite with a stepwise-distributed pore structure |
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| Authors: | Haijuan Zhang Yongdan Li |
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| Affiliation: | a Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, China
b Fushun Research Institute of petroleum and petrochemicals, SINOPEC, Fushun 113001, China |
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| Abstract: | A Beta/MCM-41 composite zeolite with a stepwise-distributed pore structure was prepared with a silica-alumina source originated from alkaline treatment of zeolite Beta. The material was characterized by various techniques. The results indicated that this composite possesses a mesopore system of MCM-41 and the microporous structure of Beta zeolite. Hydrothermal stability and acidity was improved over MCM-41 due to the introduction of Beta building units into the mesopore walls. The composite was used as the support of a Pd-Pt catalyst for the hydrogenation of naphthalene in the presence and absence of 4, 6-dimethyldibenzothiophene. It was demonstrated that the catalyst has an enhanced activity and sulfur tolerance during naphthalene hydrogenation. |
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| Keywords: | Composite zeolite Stepwise-distributed pore structure Hydrothermal stability Acidity Zeolite Beta and MCM-41 Sulfur tolerance |
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