Catalytic conversion of 1,1,1,2-tetrafluoroethane (HFC-134a)

다국어 초록 (Multilingual Abstract)

We examined the conversion of HFC-134a over five catalysts, Na2CO3, CaO, CaCO3, and two types of - Al2O3 with different surface areas, between 300 and 600 oC. HFC-134a was barely converted via the non-catalytic reaction, even at the highest temperature (600 oC). The operating temperatures for the catalytic conversion of HFC-134a were reduced dramatically and its efficiency increased with increasing temperature. Among the catalysts used, -Al2O3 with the larger surface area showed the highest conversion rate of HFC-134a, which was followed, in order, by -Al2O3 with the smaller surface area, CaCO3, CaO, and Na2CO3. The conversion rate of -Al2O3 decreased rapidly due to catalyst deactivation. The catalytic efficiency of -Al2O3 was maintained for a longer period by water addition. Water acted as a hydrogen donor for the dehydrofluorination reaction.

참고문헌 (Reference)

1 Z. Hausfather, 3 : 1-, 2017

2 United Nations Framework Convention on Climate Change - The Paris Agreement,

3 S. Karmakar, 151 : 394-, 1995

4 K. Teinz, 282 : 175-, 2011

5 M.M. Farris, 11 : 501-, 1992

6 O. Boese, 4 : 2824-, 2002

7 T. Skapin, 40 : 241-, 1996

8 S. Kowalak, 19 : 35-, 1982

9 T. Mi, 41 : 143-, 2015

10 M. Ohno, 1 : 159-, 2007

11 Y. S. Mok, 112 : 6586-, 2008

12 M. Jasinski, 29 : 363-, 2009

13 Narengerile, 30 : 813-, 2010

14 S.K. Kundu, 284 : 412-, 2016

15 A. Iizuka, 50 : 11808-, 2011

16 Y. Takita, 41 : 2585-, 2002

17 W. Han, 140 : 7-, 2012

18 W. Jia, 145 : 654-, 2015

19 W. Jia, 5 : 3103-, 2015

20 Y. Takita, 1 : 4501-, 1999

21 Z.M. El-Bahy, 40 : 81-, 2003

22 Z.M. El-Bahy, 90 : 283-, 2004

23 J.Y. Jeon, 11 : 1244-, 2003

24 X.-F. Xu, 266 : 131-, 2007

25 E. Vileno, 7 : 683-, 1995

26 X. Niu, 19 : 463-, 2010

27 X. Xu, 20 : 418-, 2011

28 Y. Wang, 20 : 457-, 2011

29 N.-K. Park, 185 : 247-, 2012

30 W.B. Feaver, 54 : 13-, 1999

31 H. Onoda, 288 : 98-, 2005

32 W. Han, 4 : 121-, 2014

33 M. S. Gandhi, 12 : 499-, 2015

34 박현규, "금속산화물이 담지된 γ - Al2O3 촉매상에서 가수분해에 의한 SF6의 촉매분해" 한국청정기술학회 18 (18): 83-88, 2012

35 김용슬, "γ-Al2O3 촉매상에서 열분해와 가수분해에 의한 NF3 촉매분해 특성" 한국공업화학회 26 (26): 154-158, 2015

36 UNFCCC, "The Kyoto Protocol to the United Nations Framework Convention on Climate Change"

37 "Montreal Protocol - Achievements to Date and Challenges Ahead"

38 "Kigali Amendment to the Montreal Protocol"

39 UNEP, "HFCs: A Critical Link in Protecting Climate and the Ozone Layer" United Nations Environment Programme (UNEP)

40 "Decomposition of fluoroform (HFC-23) waste streams"