Comparison on the Catalytic Cracking and Alkylation Activities between MSU-S<sub>MFI</sub> and MCM-41 Aluminosilicates _Acta Phys Chim Sin

ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU

Acta Phys Chim Sin >> 2005,Vol.21>> Issue(03)>> 324-327 doi: 10.3866/PKU.WHXB20050320 中文摘要

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Comparison on the Catalytic Cracking and Alkylation Activities between MSU-S_MFI and MCM-41 Aluminosilicates

ZHENG Jun-Lin; ZHAI Shang-Ru; YANG Dong-Jiang; ZHANG Ye; WU Dong; SUN Yu-Han
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan　030001; Graduate School of the Chinese Academy of Sciences, Beijing　100039

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Mesoporous aluminosilicates MSU-S_MFI with well-ordered hexagonal symmetry were assembled from MFI zeolitic precursors containing abundant protozeolitic nanoclusters. Normal MCM-41 was synthesized by using tetraethyl orthosilicate (TEOS) and sodium aluminate as silica source and aluminum source,respectively. The pore diameter of MSU-S_MFI sample and normal MCM-41 both are 2.70 nm, and their BET specific surface areas and pore volumes are comparable as seen from XRD and N₂ sorption results. Although both MSU-S_MFI and MCM-41 possess weak acidic sites and medium strong acidic sites in NH₃-TPD profiles, the density of weak acidic sites and medium strong acidic sites in MSU-S_MFI are much higher than that of MCM-41.The catalytic cracking conversion of cumene on MSU-S_MFI is 31％ higher than that on MCM-41 with the same Si/Al ratio, and the butylation conversion of naphthalene over MSU-S_MFI is 15％ higher than that on the MCM-41 sample. Incorporation of MFI zeolitic nanoclusters into the mesostructured framework of MSU-S_MFI led to enhanced acidity.

Keywords: Mesoporous aluminosilicates Catalytic cracking Alkylation Acidity
Received: 2004-07-06 Accepted: 2004-09-25 Publication Date (Web): 2005-03-15
Corresponding Authors: SUN Yu-Han Email: yhsun@sxicc.ac.cn

Cite this article: ZHENG Jun-Lin; ZHAI Shang-Ru; YANG Dong-Jiang; ZHANG Ye; WU Dong; SUN Yu-Han. Comparison on the Catalytic Cracking and Alkylation Activities between MSU-S_MFI and MCM-41 Aluminosilicates[J]. Acta Phys. -Chim. Sin., 2005,21 (03): 324-327. doi: 10.3866/PKU.WHXB20050320

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