基金项目:
国家自然科学基金(51576174);
高等学校博士学科点专项科研基金(20120101110099);
Project supported by National Natural Science Foundation of China (51576174), Specialized Research Fund for the Doctoral Program of Higher Education of China (20120101110099);
Compared with the traditional catalytic processes of hydrogen production from methane, the non-thermal plasma is deemed as a promising technology since it has the advantages of low energy consumption, catalyst free, and fast start-up, and also can operate in ambient conditions. Therefore, physical characteristics of magnetic rotating gliding arc discharge plasma in air was studied and experiment of methane partial oxidation for hydrogen production was carried out. The results show that the arc can rotate steadily when the air flow rate is 2 L/min, 8 L/min, and 16 L/min, respectively, with a maximum speed of 111 r/s and a fixed discharge period. The arc length and diameter have direct influences on several parameters such as discharge voltage, current, power, current density, electric field intensity, and electric conductivity. With the increase of excess air coefficient, both the CH4 conversion and H2 selectivity first augment and then decline. The highest CH4 conversion and H2 selectivity is 100% and 42.42%, respectively, having significant advantage over traditional knife-shaped gliding arc. Besides, an oxygen-rich condition is in favor of the complete conversion of methane. The research results demonstrate that the magnetic rotating gliding arc can assist the methane partial oxidation for hydrogen production.
KEY WORDS :magnetically driven;rotating gliding arc;plasma;physical characteristics;methane partial oxidation;hydrogen production;
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