Preparation and Application of Ca0.8 Sr0.2 TiO3 for Plasma Activation of CO2 |
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Authors: | Ruixing Li Qing Tang Shu Yin Tsugio Sato |
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Institution: | (1) Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku Sendai, 980-8577, Japan |
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Abstract: | Despite a large interest in plasma-assisted catalytic technology (PACT), very little has been reported about the catalytic effects of different dielectric barriers on a dielectric barrier discharge (DBD) reaction. In the present study, Ca0.8Sr0.2TiO3, that possesses a high permittivity, was prepared by liquid phase sintering and used as a dielectric barrier in a DBD reactor to break CO2. The mechanical and dielectric properties of Ca0.8Sr0.2TiO3 were greatly enhanced by adding 0.5 wt.% Li2Si2O5. A DBD plasma was successfully generated by using this Ca0.8Sr0.2TiO3 as a dielectric barrier and 18.8% CO2 conversion was achieved with the residence time of 0.17 s at the frequency of 8 kHz, which was much higher than with those using an alumina or a silica glass barrier. It was found that the plasma power increased with the increasing of the permittivity, and finally very dense and strong microdischarges were initiated to decompose CO2. |
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Keywords: | Carbon dioxide Decomposition Plasma Dielectric barrier discharge CaTiO3 SrTiO3 |
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