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Dehydration of 1,3-butanediol to butadiene over medium-pore zeolites: Another example of reaction intermediate shape selectivity

Title
Dehydration of 1,3-butanediol to butadiene over medium-pore zeolites: Another example of reaction intermediate shape selectivity
Authors
Lee, Jeong HwanHong, Suk Bong
Date Issued
Jan-2021
Publisher
ELSEVIER
Abstract
Here we compare the catalytic properties of the proton form of 11 medium-pore zeolites, with different framework topologies and/or compositions for the dehydration of biomass-derived 1,3-butanediol at 300 degrees C under excess water conditions (H2O/1,3-butanediol = 45). It was found that high-silica H-ferrierite (Si/Al = 130) with intersecting 10- and 8-ring channels exhibits the highest butadiene yield, together with the best durability, among the zeolites tested. Due to its highly inactive nature, however, 3-buten-1-ol, one of the butenol reaction intermediates in 1,3-butanediol dehydration, also remained a major by-product. IR spectroscopy with adsorbed 3-buten-1-ol shows that intramolecularly hydrogen-bonded 3-buten-1-ol exists predominantly in H-ZSM-5 with two intersecting 10-ring channels, while the one with no intramolecular hydrogen bonding is another species found not only in H-ferrierite but also in the one-dimensional 10-ring zeolite H-ZSM-22. By combining both experimental and theoretical results, we conclude that 1,3-butanediol dehydration over medium-pore zeolites may constitute another example of reaction intermediate shape selectivity.
Keywords
VAPOR-PHASE DEHYDRATION; CATALYTIC-PROPERTIES; ETHYLBENZENE DISPROPORTIONATION; CONFORMATIONAL COMPOSITION; SKELETAL ISOMERIZATION; UNSATURATED ALCOHOLS; CRACKING; FRAMEWORK; OLEFINS; 3-BUTEN-1-OL
URI
http://oasis.postech.ac.kr/handle/2014.oak/104926
ISSN
0926-3373
Article Type
Article
Citation
APPLIED CATALYSIS B-ENVIRONMENTAL, vol. 280, 2021-01
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홍석봉HONG, SUK BONG
Div of Environmental Science & Enginrg
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