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

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

Research output: Contribution to journalArticle

4 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

Fingerprint

Titanium carbide
Adsorbents
titanium
Carbon
Chlorine
adsorption
Adsorption
chlorine
carbon
etching
Global warming
Aluminum
low pressure
Etching
global warming
aluminum
Gases
Semiconductor materials
gas
titanium carbide

Keywords

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

ASJC Scopus subject areas

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

Cite this

A titanium carbide-derived novel tetrafluoromethane adsorbent with outstanding adsorption performance. / Choi, Seung Wan; Lee, Da Hee; Kim, Janghyuk; Kim, Ji Hyun; Park, Jong Ho; Beum, Hee Tae; Lim, Dae-Soon; Lee, Ki Bong.

In: Chemical Engineering Journal, Vol. 311, 2017, p. 227-235.

Research output: Contribution to journalArticle

Choi, Seung Wan ; Lee, Da Hee ; Kim, Janghyuk ; Kim, Ji Hyun ; Park, Jong Ho ; Beum, Hee Tae ; Lim, Dae-Soon ; Lee, Ki Bong. / A titanium carbide-derived novel tetrafluoromethane adsorbent with outstanding adsorption performance. In: Chemical Engineering Journal. 2017 ; Vol. 311. pp. 227-235.
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AU - Kim, Janghyuk

AU - Kim, Ji Hyun

AU - Park, Jong Ho

AU - Beum, Hee Tae

AU - Lim, Dae-Soon

AU - Lee, Ki Bong

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AB - 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.

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