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The Use of a γ-Al2O3 and MgO Mixture in the Catalytic Conversion of 1,1,1,2-Tetrafluoroethane (HFC-134a)

1
Research Center for Climate Change and Energy, Hallym University, Chuncheon 24252, Korea
2
Department of Chemical Engineering, Kongju National University, Cheonan 31080, Korea
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Department of Environmental Engineering, Daegu University, Gyeongsan 38453, Korea
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Department of Science and Humanities, Saveetha School of Engineering, Chennai 600124, India
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Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon 24252, Korea
*
Authors to whom correspondence should be addressed.
Catalysts 2019, 9(11), 901; https://doi.org/10.3390/catal9110901
Received: 25 September 2019 / Revised: 25 October 2019 / Accepted: 25 October 2019 / Published: 28 October 2019
(This article belongs to the Section Environmental Catalysis)
This paper reports the improved efficiency of 1,1,1,2-tetrafluoroethane (HFC-134a) decomposition by combined use of MgO with γ-Al2O3. While a high temperature (>900 °C) was required to achieve 90% conversion during non-catalytic pyrolysis of HFC-134a, 100% conversion of HFC-134a was achieved at 600 °C by the use of γ-Al2O3. Among the three catalysts (γ-Al2O3, MgO, and CaO) tested in this study, γ-Al2O3 showed the highest HFC-134a decomposition efficiency, followed by MgO and CaO, due to its large surface area and large amount of weak acid sites. Also with the longest lifetime among the catalysts, durability in maintaining complete decomposition of HFC-134a was shown in γ-Al2O3. The addition of MgO to γ-Al2O3 was effective in extending the lifetime of γ-Al2O3 due to the efficient interaction between HF and MgO, which can delay the deactivation of γ-Al2O3. Compared to the double bed γ-Al2O3-MgO configuration, the use of a mixed γ-Al2O3-MgO bed extended the catalyst lifetime more effectively. View Full-Text
Keywords: catalytic conversion; greenhouse gas reduction; HFC-134a; γ-Al2O3; MgO catalytic conversion; greenhouse gas reduction; HFC-134a; γ-Al2O3; MgO
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Jeong, S.; Sudibya, G.L.; Jeon, J.-K.; Kim, Y.-M.; Swamidoss, C.M.A.; Kim, S. The Use of a γ-Al2O3 and MgO Mixture in the Catalytic Conversion of 1,1,1,2-Tetrafluoroethane (HFC-134a). Catalysts 2019, 9, 901.

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