Abstract
The performance of 1,1,1,2-tetrafluoroethane or HFC-134a decomposition and the formation of byproducts in a dielectric barrier discharge plasma reactor were studied with different packing systems such as α-Al2O3 (porous and nonporous), γ-Al2O3 (porous) and ZrO2 (nonporous). Experimental variables such as reactor temperature, initial HFC-134a concentration and oxygen levels were chosen for the performance analysis. Among the packing systems, the porous γ-Al2O3 and α-Al2O3 decomposed HFC-134a much more effectively than the nonporous α-Al2O3 and ZrO2. The combination of the plasma with the porous γ-Al2O3 was found to cover a wide range of initial concentration. The decomposition efficiency tended to increase with the addition of oxygen up to 2 %, but further increase in the oxygen led to a decrease. As well as carbon oxides (CO2 and CO), significant amounts of unwanted byproducts such as COF2 and CF4 were also identified in the effluent gas with the nonporous α-Al2O3 and ZrO2. On the contrary, with the porous γ-Al2O3 and α-Al2O3, such unwanted byproducts were considerably suppressed, enhancing the formation of CO2 and CO.
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This work was carried out with the support of “Cooperative Research Program for Agriculture Science & Technology Development (Project No. PJ008414)” Rural Development Administration, Republic of Korea.
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Gandhi, M.S., Mok, Y.S. Effect of packing materials on the decomposition of tetrafluoroethane in a packed-bed dielectric barrier discharge plasma reactor. Int. J. Environ. Sci. Technol. 12, 499–506 (2015). https://doi.org/10.1007/s13762-013-0415-9
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DOI: https://doi.org/10.1007/s13762-013-0415-9