Support enhanced α-pinene isomerization over HPW/SBA-15


A family of mesoporous SBA-15 supported H3PW12O40 (HPW) catalysts were synthesized by wet-impregnation and compared with fumed silica analogues for the solventless isomerization of α-pinene under mild conditions. Structural and acidic properties of supported HPW materials were characterized by powder XRD, HRTEM, XPS, TGA, N2 porosimetry, DRIFTS, and ammonia and propylamine chemisorption and TPD. The high area, mesoporous SBA-15 architecture facilitates the formation of highly dispersed (isolated or low dimensional) HPW clusters and concomitant high acid site densities (up to 0.54 mmol g−1) relative to fumed silica wherein large HPW crystallites are formed even at low HPW loadings. α-Pinene exhibits a volcano dependence on HPW loading over the SBA-15 support due to competition between the number and accessibility of acid sites to the non-polar reactant, with the superior acid site accessibility for HPW/SBA-15 conferring a 10-fold rate enhancement with respect to HPW/fumed silica and pure HPW. Monocyclic limonene and terpinolene products are favoured over polycyclic camphene and β-pinene by weaker polyoxometallate analogues over SBA-15.

Publication DOI:
Dataset DOI:
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Energy and Bioproducts Research Institute (EBRI)
Additional Information: © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( Funding: EPSRC (EP/K000616/2; EP/K014749/1 and EP/M005186/1), Royal Society, and British Council under the Global Innovation Initiative for the GB3-net project. Supplementary data available on the journal website.
Uncontrolled Keywords: heteropolyacid,phosphotungstic acid,SBA-15,α-pinene,Catalysis,Process Chemistry and Technology,Environmental Science(all)
Publication ISSN: 1873-3883
Last Modified: 17 Jun 2024 07:21
Date Deposited: 02 Aug 2016 10:35
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2017-01
Published Online Date: 2016-06-27
Accepted Date: 2016-06-21
Submitted Date: 2016-05-10
Authors: Frattini, Lucia
Isaacs, Mark A.
Parlett, Christopher M.A. (ORCID Profile 0000-0002-3651-7314)
Wilson, Karen (ORCID Profile 0000-0003-4873-708X)
Kyriakou, Georgios
Lee, Adam F. (ORCID Profile 0000-0002-2153-1391)



Version: Published Version

License: Creative Commons Attribution

Export / Share Citation


Additional statistics for this record