Role of Recrystallization in Alkaline Treatment on the Catalytic Activity of 1-Butene Epoxidation

Yi Zuo, Liqian Yang, Xiao Jiang, Mengtong Ma, Yanli Wang, Min Liu, Chunshan Song, Xinwen Guo

Research output: Contribution to journalArticlepeer-review

Abstract

Two alkylol amines, which were ethanolamine (EOA) and triethanolamine (TEOA), were used to posttreat nanosized titanium silicalite-1 (TS-1) to improve its catalytic activity for 1-butene epoxidation. Comparative studies were conducted to clarify the influences of the EOA and TEOA concentrations on the physicochemical properties through detailed characterization. EOA treatment can dissolve the framework Si, [SiO4], on the external surface of TS-1, generating some macropores. TEOA serves as structure-directing agent to form MFI topology other than the dissolution of [SiO4], and promotes the recrystallization of [SiO4], forming new TS-1 particles over the external surface. The two treatments can both improve the catalytic activity of 1-butene epoxidation, but the samples treated with TEOA exhibit better catalytic stability. This can be attributed to the characteristic recrystallization of [SiO4] in the case of TEOA treatment, stabilizing the structure of TS-1 and maintaining more framework Ti and intercrystal space.

Original languageEnglish (US)
Pages (from-to)6196-6204
Number of pages9
JournalChemCatChem
Volume12
Issue number24
DOIs
StatePublished - Dec 16 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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