煤基甲醇和天然气基甲醇燃料的生命周期影响评价

摘要

With life cycle assessment methodology, the environment impact in life cycle of Coal-Based M85(mixture of 85% methanol and 15% gasoline by volume) and Natural Gas-Based M85 are assessed and compared with conventional gasoline. Compared with conventional gasoline, Coal -Based M85 and Natural Gas-Based M85 can reduce the overall environmental impact value (OEIV) by 41.2% and 60.8%. Among the emissions, the VOC effects the environment mostly. The SC2 emis-sion of Coal-Based M85 is higher than that of Natural Gas-Based M85, which leads to that the OEIV of Coal-Based M85 is more higher than Natural Gas-Based M85. The C02 emission caused by CO shift conversion process of coal to methanol is 36% of the life cycle CO2 emission, which leads to that the life cycle greenhouse gases emissions of Coal-Based M85 is higher than that of gasoline and Natural Gas-Based M85.%用生命周期评价方法,对煤基M85(甲醇体积占85％的甲醇汽油混合燃料)和天然气基M85的生命周期环境影响进行评价.结果表明:与汽油相比,煤基M85和天然气基M85燃料的环境影响总水平值分别降低了41.2％和60.8％.在污染物中,VOC排放产生的环境影响最大.煤基M85的SO2排放高于天然气基M85,导致煤基M85对环境影响总水平值高于天然气基M85.煤制甲醇CO变换工艺造成的CO2排放占煤基M85全生命周期CO2排放的36％,导致其生命周期内的温室气体排放高于汽油和天然气基M85.