Shape selectivity and acidity effects in glycerol acetylation with acetic anhydride: selective synthesis of triacetin over Y-zeolite and sulfonated mesoporous carbons

Lakhya Konwar, Päivi Mäki-Arvela, Pakiza Begum, Narendra Kumar, Ashim Jyoti Thakur, Jyri-Pekka Mikkola, Ramesh Chandra Deka, Dhanapati Deka

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Abstract

100% triacetin selectivity was achieved in glycerol acetylation with acetic anhydride in 20–50 min in the presence of catalytic amounts of mesoporous sulfonated carbons and zeolite H-Y. Experimental results obtained over a range of solid acids with varying structure and acidic properties indicate that selectivity to triacetin was influenced mainly by the pore structure and catalyst surface acid site density. The shape selectivity effect over microporous zeolites was verified from the molecular dimensions of glycerol, monoacetin, diacetin and triacetin obtained from DFT calculations; on the contrary in mesoporous catalyst surface acid site density was responsible for determining triacetin selectivity.
Original languageUndefined/Unknown
Pages (from-to)237–247
JournalJournal of Catalysis
Volume329
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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