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

Authors
Choi, Seung WanLee, Da-HeeKim, JanghyukKim, JihyunPark, Jong-HoBeum, Hee TaeLim, Dae-SoonLee, Ki Bong
Issue Date
1-3월-2017
Publisher
ELSEVIER SCIENCE SA
Keywords
Tetrafluoromethane; Adsorption; Microporous carbon; Titanium carbide; Chlorination
Citation
CHEMICAL ENGINEERING JOURNAL, v.311, pp.227 - 235
Indexed
SCIE
SCOPUS
Journal Title
CHEMICAL ENGINEERING JOURNAL
Volume
311
Start Page
227
End Page
235
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/84179
DOI
10.1016/j.cej.2016.11.102
ISSN
1385-8947
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 CF4 combustion disposal method, and the development of appropriate adsorbents is important for a competent CF4 adsorption process. Here, microporous carbons are synthesized for new CF4 adsorbents by the selective etching of titanium carbide using chlorine gas at high temperatures (800, 900, and 1000 degrees C). Additionally, post-treatment with H-2 eliminates any unreacted chlorine. Interestingly, the CF4 adsorption 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 degrees C and post-treated with H2 has the highest CF4 adsorption capacity of 2.96 mol kg(-1) at 25 degrees C and 1 atm, which is the highest reported value to date. Besides the high CF4 adsorption capacity, the prepared microporous carbon shows a high selectivity for CF4 over N-2 at low CF4 partial pressures and an excellent cyclic stability. (C) 2016 Elsevier B.V. All rights reserved.
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공과대학 (화공생명공학과)
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