Cost-Benefit Analysis Of The NO_X Emission Control Of Power Industry In China

Nitrogen oxide emission control is an important part of air quality management ofChina. Power plant is one of the most important nitrogen oxide emissions sources, andalso the key section of nitrogen oxides emission control in the “Twelfth Five-Year”period. Based on the2010national nitrogen oxides emission inventory and thedevelopment of power sector, appropriate baseline scenario and control scenarios on thedevelopment of power sector and the application of nitrogen oxides control measures inthe “Twelfth Five-Year” period are set. On this basis, the provincial construction andoperating costs and the formation of denitrification facilities from2010to2015arecalculated. Meanwhile, main pollutant concentration reduction caused by nitrogenoxides emission control is estimated with air quality model, and the benefits of nitrogenoxides reduction of power plants are calculated, formed by the health impact of fineparticulate and effect on crop yield of O3. Through the comprehensive analysis of thecosts and benefits, a scientific basis for policy formulation is provided.In terms of power plant NO_Xemission reduction costs, the study result shows thatin the control of power plants based on the total emission ceiling (TE) scenario, the totolconstruction costs of all control measures are66.070billion yuan and the operatingcosts are26.820billion yuan per year. In the control of power plants based on the newemission standard (NS) scenario, the total construction costs are89.079billion yuan andthe operating costs are36.552billion yuan per year. The dense populated and highelectric power demand provinces, such as Inner Mongolia, Jiangsu, Shandong,Guangdong take the most part. For the power plants using SCR, the unit generating costwill grow by0.00773-0.00892yuan per kWh and for those using SNCR, the numberwill be0.00428-0.00444yuan per kWh. For the cost of unit NO_Xemission reduction,it’s about9.38-10.84yuan per kilogram for SCR, and7.50-7.78yuan per kilogram forSNCR.In terms of the effect of power plant NO_Xemission reduction, our study resultshows that in both TE and NS scenarios, compared with2010, the major air pollutantsconcentration of2015will decrease. The annual average concentration of NO2will reduce by0.21μg/m3and0.43μg/m3. Similarly, the number will be0.15μg/m3,0.29μg/m3for PM10,0.14μg/m3,0.28μg/m3for PM2.5, and0.14μg/m3,0.26μg/m3forNO3-. The monthly average daily maximum O3will reduce by1.09μg/m3and1.93μg/m3.On this basis, the health impact of fine particulate and effect on crop yield of O3in2015caused by nitrogen oxides emission reduction are estimated. The result shows that thetotal benefit in TE scenario is86.430billion yuan, with75.156billion yuan for thehealth benefit, and11.274billion yuan for the crop benefit included. The benefit-costratio is3.22. The total benefit in NS scenario is131.204billion yuan, with114.974billion yuan for the health benefit, and16.230billion yuan for the crop benefit included.The benefit-cost ratio is3.62.