热等离子体重整天然气和二氧化碳制合成气实验研究

常压下利用15 kW的实验室装置,进行了天然气和二氧化碳在氢等离子体射流作用下重整制合成气的实验。考察输入功率、原料气流量和甲烷与二氧化碳的配比对反应转化率、选择性的影响。结果表明:转化率主要由输入功率和原料气流量决定，产品的选择性与原料气的配比密切相关。如在等离子体输入功率8.5 kW，原料气进量1.3 m³/h，原料配比CH₄/CO₂为4∶6条件下，甲烷转化率为87.98%，二氧化碳的转化率84.34%，一氧化碳的选择性82.27％，能量产率达到1.63 mmol/kJ。与电晕放电、介质阻挡放电等离子体过程相比，热等离子体射流重整反应具有处理量大,产物单一的优点，而且能量产率较高，显示出良好的应用前景。

EXPERIMENTAL STUDY ON SYNGAS PRODUCTION BY CARBON DIOXIDE (CO2) REFORMING OF METHANE (CH4) BY PLASMA JET

The experiment of CO2 reforming of CH4 was carried out in the laboratory with input power of 15 kW under normal pressure. This test was to investigate how CO2 CH4 conversion ration and the selectivity of carbon monoxide are affected by input power, feedstock flow rate, and molar ratio between CO2 and CH4. The experimental results show that the conversion rate of methane and carbon dioxide is mainly determined by plasma power and feedstock flow rate, and the product selectivity is sensitive to feedstock molar ratio. For example, under the condition of plasma power 8.5 kW, feedstock flow rate 1.3 m3/h, the conversion rate of methane and carbon dioxide is 87.98% and 84.34% respectively; the selectivity of carbon monoxide is 82.27% when the molar ratio of CO2/CH4 is 4∶6, and the energy efficiency can reach up to 1.63 m mol/kJ. Comparing to the similar experiments by corona, dielectric barrier discharge plasma, CO2/CH4 reforming by warm plasma has the unparalleled advantages like dealing with great volume, producing little by product, getting high energy efficiency, which shows a bright prospects in application.