煤基车用燃料的生命周期能源消耗与温室气体排放分析

Analysis of life cycle energy consumption and green house gases emission of coal-based vehicle fuels

利用生命周期评价方法,以中国的能源生产和运输为背景,对汽油、柴油、甲醇汽油和二甲醚这4种煤基车用燃料配合不同车辆发动机技术的全生命周期能源消耗和温室气体排放进行了研究,得出:煤基车用燃料全生命周期所消耗的一次能源与排出的温室气体超过60%发生在上游阶段,特别是燃料阶段;车辆的燃料经济性对全生命周期指标影响较大;从总量来看,二甲醚是较好的选择,柴油次之,汽油路线则是最差的,但考虑到车辆技术的明显区别,汽油和甲醇汽油仍然存在应用的可能性.

With life cycle assessment methodology, the primary energy consumption and green house gases （GHGs） emission of coal-based vehicle fuels including gasoline, diesel, methanol-gasoline and dimethyl ether （DME） were analyzed and compared at the background of China. The conclusions are as follows： approximate 60 % of primary energy use and GHGs emission of these coal-based vehicle fuels occur in upstream, especially at the fuel production phase; the vehicle＇ s fuel economy has important influence on life cycle analysis; among four coal-based fuel pathways, DME is a better choice than others with the least primary energy consumption and GHGs emission, diesel is the second, and gasoline is the worst, but gasoline and methanol-gasoline still have application possibility because of obvious difference of vehicle technologies.