气煤联产甲醇天然气转化工艺方案选择

介绍了气煤联产甲醇氢碳互补和天然气转化工艺原理,分析了不同转化工艺的过剩氢,对一段与二段转化的天然气消耗、煤气变换率、CO2排放、动力消耗、投资进行了比较,指出了一段蒸汽转化能起到很好的补氢作用,可使水煤气的变换率为最低,一段蒸汽转化无论是在天然气消耗、动力消耗、CO2排放,还是投资上均优于二段转化,是气煤联产甲醇的最佳转化方案。

Process Selection for Gas-coal Based Coproducing Methanol

The process philosophy of gas-coal based SNG production coproducing methanol and H2 and CO complementation was addressed.The excess hydrogen from different conversion processes was analyzed.Comparison was made on the natural gas consumption,gas conversion ratio,CO2 emission,power consumption and investment between the processes of primary reforming and secondary reforming.Being better than the secondary reforming process in such aspects as feed consumption,power consumption,CO2 emission and investment,the primary reforming was the best process as it could play a good role of hydrogen complement and minimize the water gas shift rate.