The catalytic decomposition of CF4 over Ce/Al2O 3 modified by a cerium sulfate precursor

Jung Yeon Song, Sang Ho Chung, Min Sung Kim, Myung Gi Seo, Yong Hee Lee, Kwan Young Lee, Jong Su Kim

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16 Citations (Scopus)

Abstract

The effect of alumina-based catalysts modified by cerium sulfate on the decomposition CF4 at reaction temperatures below 700 °C was studied. The catalyst characteristics were determined using various techniques, including X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, ammonia temperature-programmed desorption (NH3-TPD), elemental analysis (EA) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) to relate the catalytic reactivity with the catalyst properties. The existence of sulfate in alumina-based catalysts provided good catalytic performance due to the increased number of total acidic sites, especially strongly acidic sites, relative to the non-sulfated catalysts. When the catalysts were modified by cerium that could be higher stability in alumina-based catalysts, AlF3 phase that alumina catalyst can be transformed to in CF4 hydrolytic decomposition was not observed on the catalysts. We concluded that the existence of sulfate and cerium in alumina-based catalysts influenced the acid properties, phase composition and specific surface area of the catalysts, which in turn affected the catalyst performance.

Original languageEnglish
Pages (from-to)50-55
Number of pages6
JournalJournal of Molecular Catalysis A: Chemical
Volume370
DOIs
Publication statusPublished - 2013 Apr 1

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Keywords

  • Alumina
  • Cerium sulfate
  • CF decomposition
  • NH -TPD
  • Sulfate

ASJC Scopus subject areas

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

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