Open AccessComparison on the Catalytic Cracking and Alkylation Activities between MSU-S<sub>MFI</sub> and MCM-41 Aluminosilicates
Author(s) -
Zheng Junlin,
Zhai Shang-Ru,
YANG Dong-Jiang,
Zhang Ye,
Dong Wu,
Yahui Sun
Publication year - 2005
Publication title -
wuli huaxue xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.396
H-Index - 37
ISSN - 1000-6818
DOI - 10.3866/pku.whxb20050320
Subject(s) - aluminosilicate , alkylation , fluid catalytic cracking , cracking , catalysis , chemistry , chemical engineering , nuclear chemistry , organic chemistry , engineering
Mesoporous aluminosilicates MSU-SMFI 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-SMFI 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-SMFI 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-SMFI are much higher than that of MCM-41.The catalytic cracking conversion of cumene on MSU-SMFI is 31% higher than that on MCM-41 with the same Si/Al ratio, and the butylation conversion of naphthalene over MSU-SMFI is 15% higher than that on the MCM-41 sample. Incorporation of MFI zeolitic nanoclusters into the mesostructured framework of MSU-SMFI led to enhanced acidity.No Full Tex