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Received November 21, 2017
Accepted March 21, 2018
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Catalytic conversion of 1,1,1,2-tetrafluoroethane (HFC-134a)
Tae Uk Han
Beom-Sik Yoo
Young-Min Kim
ByeongAh Hwang
Gamal Luckman Sudibya
Young-Kwon Park1
Seungdo Kim†
Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon 24252, Korea 1School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
Korean Journal of Chemical Engineering, August 2018, 35(8), 1611-1619(9), 10.1007/s11814-018-0051-7
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Abstract
We examined the conversion of HFC-134a over five catalysts, Na2CO3, CaO, CaCO3, and two types of γ- Al2O3 with different surface areas, between 300 and 600 °C. HFC-134a was barely converted via the non-catalytic reaction, even at the highest temperature (600 °C). The operating temperatures for the catalytic conversion of HFC-134a were reduced dramatically and its efficiency increased with increasing temperature. Among the catalysts used, γ-Al2O3 with the larger surface area showed the highest conversion rate of HFC-134a, which was followed, in order, by γ-Al2O3 with the smaller surface area, CaCO3, CaO, and Na2CO3. The conversion rate of γ-Al2O3 decreased rapidly due to catalyst deactivation. The catalytic efficiency of γ-Al2O3 was maintained for a longer period by water addition. Water acted as a hydrogen donor for the dehydrofluorination reaction.
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El-Bahy ZM, Ohnishi R, Ichikawa M, Appl. Catal. B: Environ., 40(2), 81 (2003)
El-Bahy ZM, Ohnishi R, Ichikawa M, Catal. Today, 90(3-4), 283 (2004)
Jeon JY, Xu XF, Choi MH, Kim HY, Park YK, Chem. Commun., 11, 1244 (2003)
Xu XF, Jeon JY, Choi MH, Kim HY, Choi WC, Park YK, J. Mol. Catal. A-Chem., 266(1-2), 131 (2007)
Vileno E, LeClair MK, Suib SL, Cutlip MB, Galasso FS, Hardwick SJ, Chem. Mater., 7, 683 (1995)
Niu X, Sun L, Wang Y, Wu H, Xu X, J. Natural Gas Chem., 19, 463 (2010)
Xu X, Sun L, Wang Y, J. Natural Gas Chem., 20, 418 (2011)
Kim YS, Park NK, Lee TJ, Appl. Chem. Eng., 26(2), 154 (2015)
Wang Y, Xu X, Sheng P, Li H, Wang T, Huang Y, Liu F, J. Natural Gas Chem., 20, 457 (2011)
Park NK, Park HG, Lee TJ, Chang WC, Kwon WT, Catal. Today, 185(1), 247 (2012)
Feaver WB, Rossin JA, Catal. Today, 54(1), 13 (1999)
Onoda H, Ohta T, Tamaki J, Kojima K, Appl. Catal. A: Gen., 288(1-2), 98 (2005)
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Gandhi MS, Mok YS, Int. J. Environ. Sci. Technol., 12, 499 (2015)
Kowalak S, React. Kinet. Catal. Lett., 19, 35 (1982)
Skapin T, Kemnitz E, Catal. Lett., 40(3-4), 241 (1996)
Boese O, Unger WES, Kemnitz E, Schroeder SLM, Phys. Chem. Chem. Phys., 4, 2824 (2002)
Farris MM, Klinghoffer AA, Rossin JA, Tevault DE, Catal. Today, 11, 501 (1992)
Teinz K, Wuttke S, Borno F, Eicher J, Kemnitz E, J. Catal., 282(1), 175 (2011)
Karmakar S, Greene HL, J. Catal., 151(2), 394 (1995)
Park HG, Park NK, Lee TJ, Chang WC, Kwon WT, Clean Technol., 18(1), 83 (2012)
