我国城市天然气替代燃煤集中供暖的大气污染减排效果

基于国家发改委“天然气利用政策”中的天然气利用领域,利用等热值替代方法计算不同领域天然气替代后的污染物减排效果,从大气污染减排角度对天然气各个利用领域的优先次序重新排列,并对2010年全国15个重点供暖城市天然气替代燃煤集中供暖的大气污染物减排量进行测算.结论表明:天然气集中供暖的大气污染减排效果排序处于前列,城市利用天然气替代燃煤集中供暖对CO2、颗粒物(PM)、SO2和NOx都有较明显的减排效果.2010年我国15个重点城市如果采用天然气集中供暖,共可减少CO2排放量2190.71万t、颗粒物(PM)排放量734.24万t、SO2排放量40.21万t、NOx排放量22.56万t.

Air pollution abatement effects of replacing coal with natural gas for central heating in cities of China

Targeting on the different gas utilization fields promulgated in the “Natural Gas Utilization Policy” by National Development and Reform Commission of China, this paper measured the emission reduction effects of replacing current fuels with equivalent calorific value of natural gas, and based on these measurements, re-ranked the priority of different gas utilization fields. The results show that: the air pollution abatement effects of natural gas heating ranks at the top level among all different utilization fields. This paper also calculated the scale of air pollutant abatement effect by replacing coal with natural gas for central heating in 15major heating cities of China in 2010, and proved that significant emission reduction effects on CO2 (21.91 million tons), particulate material (7.34 million tons), SO2 (402.1 thousand tons) and NOx (225.6 thousand tons) can be achieved by converting fuel from coal to natural gas in central heating in cities of China.