Synthesis and Toluene Adsorption/Desorption Property of Beta Zeolite Coated on Cordierite Honeycomb by an In Situ Crystallization Method |
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| Authors: | Y. Zhang Q. Su Z. Wang Y. Yang Y. Xin D. Han X. Yang H. Wang X. Gao Z. Zhang |
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| Affiliation: | 1. Liaoning key laboratory of Internal Combustion Engines, Institute of Internal Combustion Engine, Dalian University of Technology, 2 Linggong Rd., Dalian, 116024, P. R. China;2. College of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Rd., Jinan 250022, P. R. China |
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| Abstract: | The beta zeolite on cordierite ceramic monolith was synthesized by an in situ crystallization method and characterized by XRD, N2 adsorption/desorption, SEM and NH3‐TPD techniques. Toluene adsorption/desorption was used as probe test for the control of cold‐start emissions and treatment of volatile organic compounds. The presence of beta on the supports was confirmed by XRD, SEM, and N2 adsorption/desorption measurements. The zeolite crystals grow both into the cordierite macropores and on the surface of the monolith channels, which form an integrated network ensuring a strong adherence. The highly dispersed beta on supports, demonstrated by larger surface area and adsorption capacity of N2, resulted in a significant increase of the total acidity, and thus a greater adsorption capacity for toluene. Furthermore, it could trap larger amounts of toluene to higher temperature and show considerable activity for toluene cracking and oxidation. These are attributed to the greater acidity and stronger acid sites of in situ synthesized beta. |
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| Keywords: | Cordierite ceramic honeycomb Crystallization Synthesis Toluene Zeolites |
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