中文摘要：

采用一种简单结构的直流电弧反应器,在无催化剂存在的条件下,高效率地实现了毫秒级甲烷二氧化碳的重整反应,产物选择性好,并且在反应过程中几乎没有积炭生成。在恒定输入功率（170W）的条件下考察了气体总流量和二氧化碳/甲烷摩尔比对反应结果的影响。提高反应气体的输入能量密度可以提高甲烷和二氧化碳的转化率,并且能够有效地抑制副产物的生成。当二氧化碳/甲烷摩尔比为1时,二氧化碳转化率为89.8%,甲烷转化率为96.3%,氢气和一氧化碳的选择性分别为99.6%和99.3%。二氧化碳过量可显著促进甲烷的转化以及同时获得合成气的高选择性。采用比能耗对该过程的能量利用效率进行了分析,以期指导反应条件优化以提高过程的能量利用效率。

英文摘要：

Carbon dioxide and methane reforming using a unique DC arc plasma reactor without catalyst could achieve high conversions and selectivity in milliseconds.Very little coke was formed during the course of reaction.Influences of the total flow rate and molar ratio of CO2 to CH4 at an input power of 170 W were studied to find the optimum operating conditions.Increasing the input energy density promoted the conversions of reactants and reduced the formation of the by-products efficiently.The conversions of CO2 and CH4 reached 89.8% and 96.3%,respectively,and the selectivities to H2 and CO products were 99.6% and 99.3%,respectively,where the mole ratio of CO2 to CH4 was 1.Excessive CO2 could benefit the conversion of CH4 and result in the high selectivity to syngas.Specific energy requirement（SER）was used to express the energy utilization efficiency of the process,providing a practical guidance on optimization of reaction conditions to increase the energy efficiency.