Abstract
Basic phenomena of the reduction of carbon dioxide to reusable organic materials including methane and methanol were investigated by using a radio frequency impulse discharge in a low gas pressure range without catalysis. The discharge took place under different discharge parameters such as voltage, gas flow rate, gas-mixing ratio, and gas residence time, where the carbon dioxide was mixed with hydrogen at total gas pressure of 1-10 Torr. Organic materials such as methane and methanol were observed. Carbon monoxide was a major product from carbon dioxide. Methane was the dominant organic species produced by the discharge. The concentration of methane increased with discharge voltage, and its volume fraction attained 10-20% of the products containing carbon that came from carbon dioxide. This fraction was also dependent on the mixing ratio of carbon dioxide and hydrogen. We also observed the formation of methanol, though its fraction was low, a few %, compared with methane.
Original language | English |
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Pages (from-to) | 177-185 |
Number of pages | 9 |
Journal | Plasma Chemistry and Plasma Processing |
Volume | 32 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2012 Apr 1 |
Keywords
- Impulse discharge
- Low pressure
- Methane
- Methanol
- Reforming of carbon dioxide
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Condensed Matter Physics
- Surfaces, Coatings and Films