关键词: 甲烷, 熔融盐, 合成气, 金属锌, 同时制取

Abstract: For solving the conventional technological problems of methane conversion and metallic zinc production process, a novel molten salt reaction system was proposed. In this work, the reaction of zinc oxide with methane in a molten salt (Na2CO3/K2CO3 mass ratio is 1:1) medium was studied in a molten salt reactor with a gas chromatography (GC) analysis system. The GC analysis results of exhaust revealed that the gaseous components were H2, CO and CH4, and CO2 was not detected. Both the synthesis gas concentration and the ratio of H2 to CO (H2/CO) increased with increasing of reaction temperature, a H2/CO ratio of about 2 was achieved at 1198 K. Metallic zinc and synthesis gas were obtained separately from the gas phase and molten salt. After the reaction completed, the product of metallic zinc was successfully collected in the molten salt and characterized by XRD, SEM and EDS. Finally, analysis results of molten salt after reaction showed that there was a small amount of Na2O and NaOH by the XRD detection, which came from the faint reaction between methane and molten salt, thus the molten salt had a function of consuming carbon.

Key words: methane, molten salt, synthesis gas, metallic zinc, co-production