Synthesis of a porous chromium fluoride catalyst with a large surface area

Heng Dao Quan*, Hui E. Yang, Masanori Tamura, Akira Sekiya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

A novel approach to the preparation of a porous chromium fluoride catalyst with a large surface area is reported. The pores were generated by introduction of a siliceous material into the precursor of the catalyst and then removal of the material by reaction with anhydrous hydrogen fluoride. During the reaction, the formation and escape of a volatile gas (SiF4) from the precursor enlarged the surface area of the chromium fluoride. This process provided for the first time a porous chromium fluoride with a surface area of 187 m 2/g and a pore volume of 0.58 cm3/g. Furthermore, the porous chromium fluoride exhibited excellent chemical stability in the presence of HCl, HF, and F2. It was catalytically active for halogen exchange in a fixed-bed fluorination reaction, and it exhibited excellent catalytic performance in mitigating the coke formation on the surface of the catalyst during vapor-phase catalytic fluorination.

Original languageEnglish
Pages (from-to)254-257
Number of pages4
JournalJournal of Catalysis
Volume231
Issue number1
DOIs
Publication statusPublished - 1 Apr 2005
Externally publishedYes

Keywords

  • Anhydrous hydrogen fluoride (AHF)
  • Difluoromethane (HFC-32)
  • Organo-fluorine compounds
  • Porous chromium fluoride
  • Porous metal fluorides
  • Vapor-phase catalytic fluorination

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