Highly active three-dimensional cage type mesoporous ferrosilicate catalysts for the Friedel-Crafts alkylation

Anand, C., Srinivasu, P., Alam, S., Balasubramanian, V. V., Sawant, D. P., Palanichamy, M., Murugesan, V. and Vinu, A. (2008) Highly active three-dimensional cage type mesoporous ferrosilicate catalysts for the Friedel-Crafts alkylation. Microporous and Mesoporous Materials, 111 1-3: 72-79. doi:10.1016/j.micromeso.2007.07.011


Author Anand, C.
Srinivasu, P.
Alam, S.
Balasubramanian, V. V.
Sawant, D. P.
Palanichamy, M.
Murugesan, V.
Vinu, A.
Title Highly active three-dimensional cage type mesoporous ferrosilicate catalysts for the Friedel-Crafts alkylation
Journal name Microporous and Mesoporous Materials   Check publisher's open access policy
ISSN 1387-1811
1873-3093
Publication date 2008-04-15
Year available 2007
Sub-type Article (original research)
DOI 10.1016/j.micromeso.2007.07.011
Volume 111
Issue 1-3
Start page 72
End page 79
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Three-dimensional cage type ferrosilicate catalysts with different nSi/nFe ratios (FeSBA-1(x) where x denotes the nSi/nFe molar ratio) have been prepared at a molar hydrochloric acid to silicon ratio of 10 using cetyltriethylammonium bromide as the template. The obtained materials have been unambiguously characterized by XRD, N2 adsorption, and ESR spectroscopy, and their catalytic activity in the benzylation of benzene and the substituted benzene has also been investigated. The catalytic results of the FeSBA-1 catalysts with different nSi/nFe ratios have been compared with the uni-dimensional FeSBA-15, AlSBA-15 and FeHMS catalysts. It has been found that the activity of the FeSBA-1 catalysts is much higher as compared to that of the FeSBA-15, FeHMS and AlSBA-15 catalysts. The activity of the catalysts declines in the following order: FeSBA-1(36) > FeSBA-1(90) > FeSBA-1(120) > FeSBA-1(344) > FeSBA-15(152) > FeHMS(50) > AlSBA-15(45). The effect of various reaction parameters such as reaction time, reaction temperature, reactant feed ratio and the various electron donating groups on the benzene ring affecting the activity and selectivity of FeSBA-1(344) have also been studied. The catalysts are highly active and show a complete conversion of benzyl chloride and a clean selectivity to diphenylmethane (DPM) within a short period of time under the optimized reaction conditions. The reaction kinetics of the catalysts has been extensively investigated and the results are presented. The apparent rate constant of the FeSBA-1(344) and the BC conversion sharply increase with increasing the reaction temperature. The activity of the FeSBA-1(344) catalyst for the benzylation of different aromatic compounds is in the following order: benzene > anisole > mesitylene > p-xylene > toluene.
Keyword Benzylation
Benzene
FeSBA-1
Framework
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Published online 17 July 2007

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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