Electron-induced dry reforming of methane in a temperature-controlled dielectric barrier discharge reactor


Zhang, Xuming
Cha, Min Suk

KAUST Department
Clean Combustion Research Center
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division

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Dry reforming of methane has the potential to reduce the greenhouse gases methane and carbon dioxide and to generate hydrogen-rich syngas. In reforming methane, plasma-assisted reforming processes may have advantages over catalytic processes because they are free from coking and their response time for mobile applications is quick. Although plasma-assisted reforming techniques have seen recent developments, systematic studies that clarify the roles that electron-induced chemistry and thermo-chemistry play are needed for a full understanding of the mechanisms of plasma-assisted reformation. Here, we developed a temperature-controlled coaxial dielectric barrier discharge (DBD) apparatus to investigate the relative importance of electron-induced chemistry and thermo-chemistry in dry reforming of methane. In the tested background temperature range 297-773 K, electron-induced chemistry, as characterized by the physical properties of micro-discharges, was found to govern the conversions of CH4 and CO2, while thermo-chemistry influenced the product selectivities because they were found to depend on the background temperature. Comparisons with results from arc-jet reformation indicated that thermo-chemistry is an efficient conversion method. Our findings may improve designs of plasma-assisted reformers by using relatively hotter plasma sources. However, detailed chemical kinetic studies are needed. © 2013 IOP Publishing Ltd.

Zhang, X., & Cha, M. S. (2013). Electron-induced dry reforming of methane in a temperature-controlled dielectric barrier discharge reactor. Journal of Physics D: Applied Physics, 46(41), 415205. doi:10.1088/0022-3727/46/41/415205

This work was supported by KAUST.

IOP Publishing

Journal of Physics D: Applied Physics


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