Process analysis on co-production of methanol and ethylene glycol in coal to synthetic natural gas
LIU Yang1,2, WU Xiu-zhang2,3, LIU Yong-jian2, WANG He-ming3, WANG Bo2
1. Liaoning Datang International Fuxin Coal to Natural Gas Co., Ltd., Fuxin 123000, China; 2. Zhongxin Energy & Chemical Co., Ltd., Beijing 100084, China; 3. China Datang Corporation Ltd., Beijing 100032, China
Abstract: By analyzing typical cases which methanol and ethylene glycol are co-produced in a coal to synthetic natural gas (SNG) process,the advantages and disadvantages of coal to SNG with co-production of chemicals route are studied.It is found through studies that the resource utilization efficiency is greatly raised through products mix optimization and process system integration.In general,the coal to SNG with co-production of methanol and ethylene glycol process produces 64.8% more products than the coal to SNG process in the premise of consuming same quantity of raw materials.It is found through analysis on element flow that the utilization rates of carbon,hydrogen and oxygen by using the co-production process increase by 99 000 tons,18 100 tons and 606 900 tons,respectively compared with that by pure coal to SNG process.The co-production process enables more feed gas to convert into high value-added chemicals,which improves the economy.Multiple products mix provides space for process system integration.Coal to SNG with polygeneration chemicals process can be referred to an important path for coal-to-SNG industry to upgrade.
刘阳, 吴秀章, 刘永健, 王鹤鸣, 王波. 煤制天然气联产甲醇和乙二醇过程工艺系统分析[J]. 现代化工, 2021, 41(6): 228-231.
LIU Yang, WU Xiu-zhang, LIU Yong-jian, WANG He-ming, WANG Bo. Process analysis on co-production of methanol and ethylene glycol in coal to synthetic natural gas. Modern Chemical Industry, 2021, 41(6): 228-231.