Sulfated zirconia catalyst supported on MCM-41 mesoporous molecular sieve

Citation
Cl. Chen et al., Sulfated zirconia catalyst supported on MCM-41 mesoporous molecular sieve, APP CATAL A, 215(1-2), 2001, pp. 21-30
Citations number
33
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
APPLIED CATALYSIS A-GENERAL
ISSN journal
0926860X → ACNP
Volume
215
Issue
1-2
Year of publication
2001
Pages
21 - 30
Database
ISI
SICI code
0926-860X(20010713)215:1-2<21:SZCSOM>2.0.ZU;2-3
Abstract
Sulfated zirconia (SZ) was supported on siliceous hollow tubular MCM-41 mes oporous molecular sieve by using a one-step incipient wetness impregnation method with zirconium sulfate as the precursor. The SZ/MCM-41 catalyst was obtained by thermal decomposition of the precursor in air. The resultant ca talyst was characterized with various techniques, such as nitrogen physisor ption, X-ray diffraction, SEM, and TEM. It was shown that the well-ordered channels of MCM-41 support arranged in hexagonal arrays while the hollow tu bular morphology was retained. Both tetragonal and monoclinic phases of zir conia were developed in the catalysts. With the addition of a proper amount of aluminum as a promoter, resulting in catalyst SZA/MCM-41, the transform ation of zirconia from metastable tetragonal phase to monoclinic phase was retarded. The catalytic activity of SZA/MCM-41 catalyst in the isomerizatio n of n-butane was dramatically improved in comparison to the activities of SZ/MCM-41 or SZA/silica. (C) 2001 Elsevier Science B.V. All rights reserved .