Synthesis, Physicochemical Properties and Catalytic Performance of a Modified ZSM-5 Molecular Sieve

Abstract:

A modified ZSM-5 molecular sieve was prepared by the combination of recrystallization and carbon template methods. The samples were characterized by X-ray diffraction, N2 adsorption-desorption, NH3-TPD, TEM and SEM. The results show that the modified ZSM-5 molecular sieve has double pore distribution. The diameters of the two kinds of channels are 0.51~0.56 nm and 1.4~1.6 nm, respectively. In addition, the modified HZSM-5 (H-type ZSM-5) sample mainly has moderate strength of acid sites. Finally, the alkylation of benzene with 1-dodecene olefin was used to evaluate the catalytic performance of the as-synthesized modified ZSM-5 on macromolecules. The conversions of 1-dodecene on the modified ZSM-5, ZSM-5 prepared by conventional process and aluminum-containing SBA-15 mesoporous molecular sieve are 96%, 39% and 83%, respectively. And the selectivities of long chain alkyl benzene on those are 97%, 68% and 91%, respectively. The catalytic properties of the modified ZSM-5 on macromolecules are superior to those of ZSM-5 prepared by conventional process and aluminum-containing SBA-15 mesoporous molecular sieve.

• Periodical: Advanced Materials Research (Volumes 197-198)
• Pages: 1042-1046
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.197-198.1042
• Online since: February 2011
• Authors: Wei Qiao Liu, Gong Li, Hui Juan Tong, Wei Ning Lei, Tong Ming Shang, Zheng Song Lou, Xiang Hong He
• Keywords: Carbon Template Method, Catalytic Performance, Nano-Carbon, Recrystallization Method, ZSM-5 Molecular Sieve

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