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光谱诊断冷等离子体作用下甲烷转化机理的初步研究(英文) 总被引:3,自引:0,他引:3
冷等离子体是甲烷无氧活化制C2烃较为有效的技术手段之一,由于等离子体反应体系的复杂性,甲烷无氧活化制C2烃反应机理及过程尚不十分清楚。本文采用发射光谱原位诊断技术对冷等离子体作用下甲烷无氧活化制C2烃反应中若干激发态物种进行诊断研究,在250nm~670nm波长范围内检测到下列激发态物种:CH、C和C2。依据激发态物种检测结果、气相色谱反应产物分析结果及等离子体特性,推断了等离子体作用下甲烷无氧活化制C2烃的自由基反应历程。 相似文献
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本文引入的差分发射探针技术,主要用于测量等主子体电势。其中主要采用了直流加热探针和反馈环控制偏压电路,使等离子体电势的直接、连续和自动指示成为可能。与比较成熟的单探针测量技术相比,本文给出的方法测量结果正确,操作简单,能自动跟踪批示。 相似文献
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在常温常压下,研究了脉冲放电等离子体及其协同催化剂强化CH4氢化偶联反应.结果表明:脉冲电晕等离子体条件下,甲烷中引入氢气可以实现偶联,而且随着氢气引入量的增加甲烷的转化率以及C2收率增大,积碳减少;脉冲电压和重复频率影响CH4的转化;引入Ni/γ -Al2O3催化剂后可改善产物C2烃的分布,等离子体法制备的Ni/γ -Al2O3催化剂性能优于化学法制备的Ni/γ -Al2O3催化剂.开辟了一条甲烷偶联新技术路线. 相似文献
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Study on the hydrogenation coupling of methane 总被引:4,自引:0,他引:4
At atmospheric pressure and ambient temperature, the hydrogenation coupling of methane was studied by using pulse corona plasma and its synergism with catalyst. The results showed that (i) under pulse corona plasma, the coupling of methane could be fulfilled by the addition of hydrogen, and with the increase of the amount of hydrogen, the conversion of methane and the yield of C2 hydrocarbon increased, and the deposit of carbon decreased; (ii) the conversion of methane was affected by pulse voltage and repeated frequency; (iii) in the system, the addition of Ni/y-AI203 could improve the distribution of C2 hydrocarbon; (iv) the activity of Ni/y-AI2O3 prepared by cold plasma was better than that by chemical methods. The experiment opened up a new technical route of the coupling of methane. 相似文献
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