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Direct dehydration of 1,3-butanediol into butadiene over aluminosilicate catalysts

Jing, F., Katryniok, B., Araque, M., Wojcieszak, R., Capron, M., Paul, S., Daturi, M., Clacens, J.-M., De Campo, F., Liebens, A., Dumeignil, F. and Pera-Titus, M. 2016. Direct dehydration of 1,3-butanediol into butadiene over aluminosilicate catalysts. Catalysis Science and Technology 6 (15) , pp. 5830-5840. 10.1039/C5CY02211H

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The catalytic dehydration of 1,3-butanediol into butadiene was investigated over various aluminosilicates with different SiO2/Al2O3 ratios and pore architectures. A correlation between the catalytic performance and the total number of acid sites and acid strength was established, with a better performance for lower acid site densities as inferred from combined NH3-TPD, pyridine adsorption and 27Al-NMR MAS spectroscopy. The presence of native Brønsted acid sites of medium strength was correlated to the formation of butadiene. A maximum butadiene yield of 60% was achieved at 300 °C over H-ZSM-5 with a SiO2/Al2O3 ratio of 260 with the simultaneous formation of propylene at a BD/propylene selectivity ratio of 2.5. This catalyst further exhibited a slight deactivation during a 102 h run with a decrease in the conversion from 100% to 80% due to coke deposition as evidenced by XPS and TGA-MS, resulting in a 36% loss of the specific surface area.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Royal Society of Chemistry
ISSN: 2044-4753
Date of First Compliant Deposit: 11 January 2021
Date of Acceptance: 4 February 2016
Last Modified: 11 Jan 2021 16:30

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