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Citation: Zhu Aimin, Zhang Xiuling, Gong Weimin, Dai Bin, Zhang Baoan. Coupling of Methane Under Pulse Corona Plasma Ⅱ. Effect of Gas Additives[J]. Chinese Journal of Applied Chemistry, ;1999, 16(4): 70-73. shu

Coupling of Methane Under Pulse Corona Plasma Ⅱ. Effect of Gas Additives

1.
Laboratory of Comprehensive Utilization of Carbonaceous Resources, Dalian University of Science and Technology, Dalian 116012

Received Date: 12 January 1999
Available Online: 28 May 1999
Fund Project: 国家自然科学基金(29576229) (29576229)

The functions of several gas additives: hydrogen, nitrogen, helium, carbon dioxide and oxygen on the dehydrogenative coupling of methane under pulse corone plasma at ambient temperature and atmospheric pressure have been examined. The results showed that hydrogen has hardly any influences on the coupling of methane. Nitrogen and helium are helpful to the formation of ethane and ethylene and restrain the acetylene formation to a certain degree. Acetylene remains as the main component (>75%) among C₂ products. Increasing the ratio of carbon dioxide to methane causes an increase of methane conversion, whereas C₂H₂ selectivity decreases dramatically after a relative stable region and the C₂H₆ and C₂H₄ selectivities show little change. The C₂ yield exibits a maximum at a CO₂/CH₄ ratio of 0.2. Increasing the ratio of oxygen to methane increases the methane conversion but C₂ yield only slightly increases at O₂/CH₄ ratio less than 0.16.
- methane,
- dehydrogenative coupling,
- pulse corona plasma,
- gas additive
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