| | 1 | Author
| Bor-Jih Lee, Shigeo Kitsukawa, Hidemoto Nakagawa, Shukuji Asakura, Kenzo Fukuda | Requires cookie* | | | Title
| The Partial Oxidation of Methane to Methanol with Nitrite and Nitrate Melts  | | | | Abstract
| The effect of reduced oxygen species on the partial oxidation of methane to methanol was examined with nitrite melts. The experimental results support the suggestion that the formation of methanol or C2 compounds depends on different reduced oxygen species, as observed in our previous work using nitrate melts. It has been suggested that the partial oxidation of methane proceeds to CH3OH or C2 compounds via parallel pathways. This suggestion was verified by increasing the oxygen concentration to carry out the partial oxidation of methane in 25 mol% NaNC>3 -75 mol% KNO3 melts. A methanol selectivity of 8.2% and a methanol yield of 0.43% were observed with CH4/O 2 = 15/1 at 575 °C, whereas with CH4/O 2 = 7/1 methanol selectivity and yield increased to 23.7% and 1.1%, respectively. The results further confirm the contribution of the superoxide ion O 2-on methanol formation. | | | |
Reference
| Z. Naturforsch. 53b, 679—682 (1998); received February 26 1998 | | | |
Published
| 1998 | | | |
Keywords
| Superoxide Ion, Nitrite, Nitrate, Partial Oxidation, Methanol | | | |
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| default:Reihe_B/53/ZNB-1998-53b-0679.pdf | | | | Identifier
| ZNB-1998-53b-0679 | | | | Volume
| 53 | |
| 2 | Author
| Z. Naturforsch | Requires cookie* | | | Title
| The Promotive Properties of Alkali Metal Nitrate Melts for the Partial Oxidation of Methane to Methanol | | | | Abstract
| B o r-Jih L ee, S higeo K itsu k aw a, S h u k u ji A sa k u ra * , K en z o F u k u d a D epartm ent (Na, K)N 0 3 melts of various ratios were used as prom oters for the partial oxidation of methane to methanol. Experiments were perform ed in a flow reactor system under atmo spheric pressure and at various tem peratures in the range of 525-600 °C. The influence of reaction temperature, melt composition, and reduced oxygen species on m ethane conversion and methanol selectivity were investigated systematically. The major reaction products were CH 3O H, CO, C 0 2, and trace amounts of C2H 6 and C2H 4. A m ethane conversion of 1.8-12.4% and a methanol selectivity of 0.4-14.1% were obtained under these reaction condi tions. Binary melts could achieve higher m ethanol selectivity than a single melt. The amounts of reduced oxygen species 0 2~ and 0 22-were estimated from thermochemical data according to the ion equilibrium in molten nitrates. The promotive effect of nitrate melts was confirmed and the results indicate that superoxide 0 2~ plays an im portant role for methanol formation. | | | |
Reference
| Z. Naturforsch. 53b, 249—255 (1998); received O ctober 7 1997 | | | |
Published
| 1998 | | | |
Keywords
| Partial Oxidation, Conversion, Selectivity, Molten Salt, Reduced Oxygen Species | | | |
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| default:Reihe_B/53/ZNB-1998-53b-0249.pdf | | | | Identifier
| ZNB-1998-53b-0249 | | | | Volume
| 53 | |
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