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Alkylation of catechol with methanol to give guaiacol over sulphate-modified zirconia solid acid catalysts: The influence of structural modification of zirconia on catalytic performance

Paper ID Volume ID Publish Year Pages File Format Full-Text
51774 46853 2008 6 PDF Available
Title
Alkylation of catechol with methanol to give guaiacol over sulphate-modified zirconia solid acid catalysts: The influence of structural modification of zirconia on catalytic performance
Abstract

Sulphated zirconia catalysts were synthesized by wetness impregnation of Zr(OH)4 with (NH4)2SO4 solution. The samples were characterized by XRD, FTIR, BET and TPD (NH3 adsorption measurements). The catalysts were tested for the methylation of catechol in a fixed-bed reactor at 200 °C and 1 bar pressure. Calcination facilitated the transformation of ZrO2 from the tetragonal to monoclinic and addition of SO42- to Zr(OH)4 helped to retain the tetragonal phase through a surface complex phase. A direct correlation was observed between catechol activity and total acidity. The 5-wt% SO42-/ZrO2 catalyst showed the best conversion (∼80%) and selectivity for guaiacol (83%). Small addition of water in the feed improved the stability of the catalyst.

Keywords
Alkylation; Catechol activity; Guaiacol; Crude methanol; Deactivation
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Alkylation of catechol with methanol to give guaiacol over sulphate-modified zirconia solid acid catalysts: The influence of structural modification of zirconia on catalytic performance
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 14, 30 August 2008, Pages 2422–2427
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us