Elsevier, Chemical Engineering Journal, (264), p. 445-452, 2015
DOI: 10.1016/j.cej.2014.11.112
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The kinetics of CO2 reforming of CH4 in kilohertz spark-discharge plasma was studied. At CH4/CO2 ratio of 1, the effects of specific energy input (SEI), electrode gap (d), total pressure (p) and frequency of the applied voltage (f) on the reactant conversions and C-based and H-based selectivities were investigated. Thereby, the kinetic rate equation for CO2 reforming of CH4 in spark-discharge plasma was established. The dependence of the CH4 and CO2 conversions on pd value (the product of p and d) and SEI can be expressed as follows: and , where and are the rate constant of CH4 and CO2 conversion, respectively. Increasing f from 5 to 80 kHz, and increase from 0.78 and 0.53 mol·MJ−1·bar−1·mm−1 to 1.04 and 0.63 mol·MJ−1·bar−1·mm−1, respectively. The reliability of the rate equation was verified by a comparison between the calculated value and the experimental data.