Journal
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
Volume 99, Issue -, Pages 201-206Publisher
ELSEVIER
DOI: 10.1016/j.jtice.2019.03.022
Keywords
Phosphotungstic acid; Ethylenediamine grafted MIL-101; Charge interaction; Dispersion; Olefin esterification
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Funding
- National Natural Science Foundation of China [U1162116, 21076228]
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This article proposes a novel strategy for enhancing the dispersion and stability of supported H3PW12O40 (HPW) via the charge interaction between HPW anions and amino groups originating from ethylenediamine (ED) grafted on the unsaturated metal sites of MIL-101. Due to its larger specific surface area and pore volume as well as stronger interactions between HPW and the carrier, the as-prepared catalyst exhibited a higher sec-butyl acetate (SBAC) yield for the direct esterification of olefins than did the catalyst prepared by the encapsulation of HPW in the mesoporous cages of MIL-101. In addition, the HPW content incorporated in the as-prepared catalyst was optimized, and the results showed that among the series of catalysts, the HPW/ED-grafted MIL-101 catalyst with 40 wt% HPW had the highest activity and good stability for olefin esterification. This investigation sheds light on the conversion of 1-butene into high-value SBAC via the amine-functionalized MIL-101-supported HPW catalysts. (C) 2019 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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