Heterocycle-modified 12-tungstophosphoric acid as heterogeneous catalyst for epoxidation of propylene with hydrogen peroxide

Hyun Jae Kim, Yukwon Jeon, Joo Il Park, Yong Gun Shul

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

12-Phosphotungstic acid (PWA)-based complex catalysts for propylene epoxidation were prepared by modification with nitrogen-containing heterocycles such as imidazole, pyrazole and 1,2,4-triazole. Heterocycles played an important role in promotion of the catalytic activity and selectivity to propylene oxide, mostly due to the strong electronic interactions between heterocycles and terminal tungsten-oxygen on PWA. Propylene epoxidation over the complex catalyst seriously depended on the pressure and the temperature, favoring high pressure and low temperature for improved conversion and yields, respectively. The complex catalysts maintained good thermal stability up to 450 C as well as recycling performance for 5 reaction runs without any significant loss of catalyst, suggesting that they are promising heterogeneous catalysts on propylene epoxidation.

Original languageEnglish
Pages (from-to)232-237
Number of pages6
JournalJournal of Molecular Catalysis A: Chemical
Volume378
DOIs
Publication statusPublished - 2013 Aug 5

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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