Study on the technology of methanol methane co-production
Methanol synthesis catalyst and methane synthesis catalyst are prepared by precipitation method and applied in the methanol methane co-production process.Regarding the methanol methane co-production process,the effects of reaction temperature,reaction pressure,space velocity,feed composition,carbon supplementation,and other factors on the methanol and methane synthesis reactions and the series process are investigated.Reaction temperature,reaction pressure,space velocity,feed composition,and carbon supplementation all have varying degrees of impact on the methanol and methane synthesis reactions.The stability test is conducted for a total of 500 hours under the conditions of space velocity of 8 000 h-1,reaction pressure of 5.0 MPa,methanol synthesis reaction temperature of 230℃,methane synthesis reaction temperature of 320℃,and feed gas composed(φ)of CO 7.9%,CO2 10.2%,H2 58.2%,and CH4 23.7%after carbon supplementation using coke oven gas.The results show that the total conversion rate of CO is higher than 99.8%,the total conversion rate of CO2 is higher than 90.0%,the crude methanol content(w)in the product is greater than 90.0%,the CH4 content(φ)is greater than 91.0%,the CO conversion rate in the methanol synthesis reaction section is higher than 60.0%,and the CO conversion rate in the methane synthesis reaction section is higher than 99.5%.
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