Unravelling mass transport in hierarchically porous catalysts

Isaacs, M, Robinson, N, Barbero, B, Durndell, L, Manayil, J, Parlett, C, D'Agostino, C, Wilson, K and Lee, A 2019, 'Unravelling mass transport in hierarchically porous catalysts', Journal of Materials Chemistry A, vol. 7, no. 19, pp. 11814-11825.

Document type: Journal Article
Collection: Journal Articles

Title Unravelling mass transport in hierarchically porous catalysts
Author(s) Isaacs, M
Robinson, N
Barbero, B
Durndell, L
Manayil, J
Parlett, C
D'Agostino, C
Wilson, K
Lee, A
Year 2019
Journal name Journal of Materials Chemistry A
Volume number 7
Issue number 19
Start page 11814
End page 11825
Total pages 12
Publisher Royal Society of Chemistry
Abstract Bio-derived platform chemicals and fuels are important for the development of sustainable manufacturing. However, their efficient production from biomass necessitates new catalysts and processes optimised for the selective transformation of large molecules. Mesoporous and hierarchically porous functional materials are promising catalyst candidates for biomass valorisation, but quantitative relationships between pore dimensions/connectivity, mass transport, and corresponding catalytic performance are poorly defined. A family of hierarchical macroporous-mesoporous SBA-15 sulfonic acids were prepared with tunable macropore diameters for carboxylic acid esterification. Turnover frequencies for long-chain (palmitic and erucic) acids were proportional to macropore diameter (>370 nm), whereas propanoic acid esterification was independent of macropore size. Pulsed field gradient NMR diffusion experiments reveal that larger macropores enhance esterification of bulky carboxylic acids by conferring superior pore interconnectivity and associated mass transport.
Subject Catalysis and Mechanisms of Reactions
DOI - identifier 10.1039/c9ta01867k
Copyright notice The journal © The Royal Society of Chemistry 2019
ISSN 2050-7488
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