Structure-reactivity correlations in sulphated-zirconia catalysts for the isomerisation of α-pinene

Ecormier, Muriel A., Wilson, Karen and Lee, Adam F. (2003). Structure-reactivity correlations in sulphated-zirconia catalysts for the isomerisation of α-pinene. Journal of Catalysis, 215 (1), pp. 57-65.

Abstract

A range of mesoporous sulphated zirconias with tuneable structural and catalytic properties have been prepared by direct impregnation. The surface sulphate coverage can be readily varied, achieving a maximum value of ∼0.2 monolayers. High-temperature calcination induces the crystallisation of tetragonal zirconia while suppressing the monoclinic phase and enhances surface acidity. Superacid sites only appear above a critical threshold SO4 coverage of 0.08 mL (corresponding to 0.44 wt% total S). Sulphated zirconias show good activity towards α-pinene isomerisation of under mild conditions. Conversion correlates with the number Brønsted acid sites, while the selectivity towards mono- versus polycyclic products depends on the corresponding acid site strength; superacidity promotes limonene formation over camphene.

Publication DOI: https://doi.org/10.1016/S0021-9517(02)00150-1
Divisions: Engineering & Applied Sciences > Chemical engineering & applied chemistry
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Uncontrolled Keywords: solid acid catalysts,clean technology,green chemistry,zirconia,α-pinene
Related URLs: http://www.scopus.com/inward/record.url?scp=0141678124&partnerID=8YFLogxK (["eprint_fieldopt_related_url_type_scopus" not defined] URL)
Published Date: 2003-04-01
Authors: Ecormier, Muriel A.
Wilson, Karen ( 0000-0003-4873-708X)
Lee, Adam F. ( 0000-0002-2153-1391)

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