引用本文:
朱爱民, 张秀玲, 宫为民, 代斌, 张报安. 脉冲电晕等离子体作用下甲烷偶联反应的研究Ⅱ.反应添加气的影响[J]. 应用化学,
1999, 16(4): 70-73.
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.
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.
脉冲电晕等离子体作用下甲烷偶联反应的研究Ⅱ.反应添加气的影响
摘要:
考察了H2、N2、He、CO2和O2等添加气在常温常压下对脉冲电晕等离子体作用下甲烷脱氢偶联反应的影响.结果表明,H2对甲烷脱氢偶联反应的影响不大;N2和He虽能在一定程度上促进C2H6和C2H4的形成并抑制C2H2的形成,但并不能改变C2产物中C2H2的主体地位(>75%).在CH4-CO2体系中,甲烷转化率随n(CO2)/n(CH4)值的增大而上升,C2H2的选择性在保持一段稳定后急剧下降,而C2H6和C2H4的选择性变化不大.当n(CO2)/n(CH4)=0.2时,C2收率最高.在CH4-O2体系中,甲烷转化率随n(O2)/n(CH4)值的增大而上升,但C2收率仅在n(O2)/n(CH4)<0.16范围内略有提高.
English
Coupling of Methane Under Pulse Corona Plasma Ⅱ. Effect of Gas Additives
Abstract:
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.
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Key words:
- methane
- / dehydrogenative coupling
- / pulse corona plasma
- / gas additive
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