车用煤基和天然气基二甲醚燃料的生命周期评价

Life cycle assessment of the natural gas-based and coal-based DME as vehicle fuel

对煤基二甲醚和天然气基二甲醚作为车用燃料的生命周期内的单位行驶距离的能耗、温室气体CO2排放和主要污染物排放进行了评估。评估中,根据了煤基和天然气基二甲醚的不同生产工艺,结合了车辆数据。结果表明:在全生命周期内,使用天然气基二甲醚作为车用燃料,除了CO排放略高于使用煤基二甲醚做为车用燃料外,其余各项指标均低于使用煤基二甲醚做为车用燃料时的指标;在全生命周期内,无论是使用煤基二甲醚,还是天然气基二甲醚做为车用燃料,它们的可挥发性有机物(VOC)、CO和NOx排放均比使用柴油燃料时低,但它们的能耗、温室气体CO2、颗粒(PM)和SO2排放均比使用柴油燃料时高。

The energy consumption,green house gas CO2 and main pollutant emissions per travel distance in life cycle were assessed when using natural gas-based dimethyl ether（DME） and coal-based DME as vehicle fuel.The assessment was based on different production technologies of the natural gas-based DME and coal-based DME and combined with vehicle data.The results show that all energy consumption and pollutant emissions of the natural gas-based DME are lower than those of the coal-based DME,except for CO emission in life cycle.The volatile organic compound（VOC）,CO and NOx emissions of the coal-based DME and natural gas-based DME are lower than those of diesel,however,the energy consumption,CO2,particulate matter（PM） and SO2 emissions of DME are higher than those of diesel.