A titanium carbide-derived novel tetrafluoromethane adsorbent with outstanding adsorption performance

Seung Wan Choi, Da Hee Lee, Janghyuk Kim, Jihyun Kim, Jong Ho Park, Hee Tae Beum, Dae Soon Lim, Ki Bong Lee

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

CF4, which is widely used in the production of semiconductors and aluminum, has a very high global warming potential and extremely long atmospheric lifetime. Adsorption is an alternative technique to the energy-consuming conventional CF4combustion disposal method, and the development of appropriate adsorbents is important for a competent CF4adsorption process. Here, microporous carbons are synthesized for new CF4adsorbents by the selective etching of titanium carbide using chlorine gas at high temperatures (800, 900, and 1000 °C). Additionally, post-treatment with H2eliminates any unreacted chlorine. Interestingly, the CF4adsorption capacity has a linear relation with the micropore volume for pores less than 0.9 nm. The titanium carbide-based microporous carbon chlorinated at 800 °C and post-treated with H2has the highest CF4adsorption capacity of 2.96 mol kg−1at 25 °C and 1 atm, which is the highest reported value to date. Besides the high CF4adsorption capacity, the prepared microporous carbon shows a high selectivity for CF4over N2at low CF4partial pressures and an excellent cyclic stability.

Original languageEnglish
Pages (from-to)227-235
Number of pages9
JournalChemical Engineering Journal
Volume311
DOIs
Publication statusPublished - 2017

Keywords

  • Adsorption
  • Chlorination
  • Microporous carbon
  • Tetrafluoromethane
  • Titanium carbide

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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