3 years ago

Decomposition of carbon dioxide by recombining hydrogen plasma with ultralow electron temperature

We examined the rate coefficient for the decomposition of CO 2 in low-pressure recombining hydrogen plasmas with electron temperatures between 0.15 and 0.45 eV, where the electron-impact dissociation was negligible. By using this ultralow-temperature plasma, we clearly observed decomposition processes via vibrational excited states. The rate coefficient of the overall reaction, CO 2 + e → products, was 1.5 × 10 −17 m 3 /s in the ultralow-temperature plasma, which was 10 times larger than the decomposition rate coefficient of 2 × 10 −18 m 3 /s in an ionizing plasma with an electron temperature of 4 eV.

Publisher URL: http://iopscience.iop.org/1882-0786/11/6/066202

DOI: 10.7567/APEX.11.066202

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