煤制天然气技术路线的全生命周期分析

Life cycle assessment on synthetic natural gas (SNG) technology

采用Well to Wheel评价了从煤炭出发利用不同技术路线满足天然气下游需求的全生命周期能耗情况,并以北京、上海为例探讨了煤制天然气及其替代技术路线的整体影响。研究结果表明,煤制天然气能够解决清洁用能以及终端污染的问题,但是这是以较高的全生命周期能耗为代价的,以北京为例,存在比煤制天然气节省煤炭消耗33%的更加合理的利用途径。因此中国远期煤制天然气项目须谨慎规划和研究。

To make up the huge supply demand gap of natural gas in Chinese market, synthetic natural gas （SNG） method as a supplementary way for natural gas supply maintains a high time of fast development. The life cycle energy consumption with several SNG technologies used to meet the natural gas demand using Well to Wheel （WTW） life cycle analysis module, are evaluated. The influence of SNG and its substitutive technologies based on data in Beijing and Shanghai are performed. The results show that SNG can serve as a solution of clean energy and solve the terminal pollution. However,this is at a sacrifice of high life cycle energy consumption. Taking Beijing＇s data as an example, there is a more energy efficient method available for natural gas than SNG, which can save up to 33% of coal utilization. Thus in the long run, careful research for China＇s SNG should be planned ahead.