Gas phase coupling of methyl radicals during the catalytic partial oxidation of methane
The rate of gas phase CH/sub 3//sup ./ radical formation over a lithium-promoted MgO catalyst was measured using the MIESR technique and this result was compared to the overall rate of C/sub 2/H/sub 6/ formation. It was found that at least 40% of the C/sub 2/H/sub 6/ produced could be accounted for by the coupling of gas phase CH/sub 3//sup ./ radicals. A 2nd order rate constant for gas phase CH/sub 3//sup ./ radical coupling of 1.1 x 10/sup -11/ cm/sup 3/ radical/sup -1/ s/sup -1/ was determined for 670/sup 0/C. The results show that gas phase coupling of CH/sub 3//sup ./ radicals represents a major mechanistic pathway for the formation of C/sub 2/H/sub 6/ during the catalytic oxidative coupling of CH/sub 4/.
- Research Organization:
- Texas A and M Univ., College Station (USA). Dept. of Chemistry
- DOE Contract Number:
- AS05-76ER05226
- OSTI ID:
- 6368586
- Report Number(s):
- DOE/ER/05226-5B; ON: DE87011189
- Country of Publication:
- United States
- Language:
- English
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