Sulfated Zirconia Catalysts for D-Sorbitol Cascade Cyclodehydration to Isosorbide: Impact of Zirconia Phase

Zhang, X, Rabee, A, Isaacs, M, Lee, A and Wilson, K 2018, 'Sulfated Zirconia Catalysts for D-Sorbitol Cascade Cyclodehydration to Isosorbide: Impact of Zirconia Phase', ACS Sustainable Chemistry and Engineering, vol. 6, no. 11, pp. 14704-14712.


Document type: Journal Article
Collection: Journal Articles

Title Sulfated Zirconia Catalysts for D-Sorbitol Cascade Cyclodehydration to Isosorbide: Impact of Zirconia Phase
Author(s) Zhang, X
Rabee, A
Isaacs, M
Lee, A
Wilson, K
Year 2018
Journal name ACS Sustainable Chemistry and Engineering
Volume number 6
Issue number 11
Start page 14704
End page 14712
Total pages 9
Publisher American Chemical Society
Abstract Isosorbide is a widely touted intermediate for the production of biorenewable polymers and plastics, accessible through the aqueous phase cascade conversion of D-sorbitol to isosorbide via 1,4-sorbitan. However, existing routes to isosorbide typically employ mineral acids under forcing conditions, and hence alternative heterogeneously catalyzed processes are highly desirable. Aqueous phase D-sorbitol conversion was therefore investigated over families of sulfated zirconia (SZ) solid acid catalysts, with the effect of employing monoclinic, tetragonal ZrO2, or Zr(OH)4 as the parent support compared. The cascade proceeds via a stepwise dehydration to 1,4-sorbitan and subsequently isosorbide, with the latter favored over stronger acid sites. Monoclinic SZ exhibits superior activity to tetragonal SZ, reflecting a higher acid site density and pyrosulfate formation at lower SO42- loadings than over the other supports. Isosorbide selectivity at iso-conversion was proportional to acid site density, but independent of zirconia phase.
Subject Catalysis and Mechanisms of Reactions
Keyword(s) Sorbitol dehydration
Solid acid
Sulfated zirconia
biorefining
platform chemicals
DOI - identifier 10.1021/acssuschemeng.8b03268
Copyright notice © 2018 American Chemical Society.
ISSN 2168-0485
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