Experimental study on catalytic oxidation of low concentration 14CH4 by Non-thermal Plasma

Subjects: Other Disciplines submitted time 2024-06-15

裴鉴禄 梁书玮 林中鑫 李佳雨 陈建利 韩明 侯建荣 李永国

Abstract： In this study, 14CH4, the largest proportion of 14C hydrocarbons and the most chemically stable, was taken as the treatment target, and a catalytic means was introduced to investigate the treatment performance of the non-equilibrium plasma catalytic oxidation of 14CH4 at very low concentration and the parameter influence law. The results showed that the Paxing breakdown voltage of the plasma generator in this study was 16.01 kV; the introduction of Pd/Al2O3 catalyst could significantly improve the CH4 treatment performance of the plasma, and by increasing the discharge voltage, decreasing the reaction temperature and the gas flow rate, the CH4 treatment efficiency and the CO2 selectivity could reach 100% and 83.7%; and there was a synergistic effect between the plasma and Pd/Al2O3 catalyst, and the Pd/Al2O3 catalyst had a synergistic effect. There is a synergistic effect, and Pd/Al2O3 can reduce the reaction barriers, optimize the reaction path, and significantly improve the CH4 treatment performance of the plasma, while the plasma-excited reactive species are also conducive to the generation of the key reactive phase PdO in the catalyst. The present results indicate that the plasma catalytic oxidation technology can realize the effective treatment of 14C hydrocarbons with very low concentration at room temperature and pressure, and has great potential for application.

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