| As an abundant resource in the world, natural gas has been paid more and more attention to the exploitation and application due to the reduction of oil resources. Methane is the main component of natural gas and its conversion is regarded as the key problem to utilize natural gas. It is known that plasma is a very effective method to activate molecules, and nowadays methane conversion using atmospheric pressure non-thermal plasma has been widely investigated worldwide. Howerver, few studies on scale-up process of methane conversion via non-thermal plasma have been done.On the basis of the previous work, the preliminary study of the scale-up process on methane conversion via non-thermal plasma generated by glow discharge was carried out. The experimental results show that after methane flow rate scale up to 10L/h and 50L/h, the effect of parameters such as input power, CH4/H2 ratio, etc, on the reaction remains same rules. The breakdown voltage doesn't increase linearly with the increase of feed gas flow rate. Methane conversion is about 70% and acetylene selectivity is about 70% at methane flow rate 10L/h.The effect of pulse equipment added to plasma generator on methane conversion was also studied. The results show that the added four pulsed parameters have some different effect on methane reaction. Firstly, the effect of basic power is the most significant because basic power can enhance discharge intensity and electric field of discharge area, and that improves reaction activity. Secondly, peak power has some influence on the reaction, but the effect is less than that of basic power (by evaluating of discharge phenomena and reaction results). However, pulse frequency and duty ratio have little effect on the reaction.In addition, the deposited carbon was analyzed by XPS, SEM and XRD. The results show that carbon obtained from the reaction is nano-scale graphite carbon particles and can be used as rubber additive.
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