Climate Change Research ›› 2021, Vol. 17 ›› Issue (3): 296-304.doi: 10.12006/j.issn.1673-1719.2020.212

• Pollutants and GHGs reduction synergy to enhance efficiency • Previous Articles     Next Articles

Evaluation of co-controlling GHGs from pollutant reduction facilities in the industrial sectors, empirical analysis based on data in Chongqing city

WANG Min1,2(), FENG Xiang-Zhao1,2(), DU Xiao-Lin1, WU Li-Ping3, ZHAO Meng-Xue1, WANG Peng1,2, AN Qi1   

  1. 1 Department of Energy and Environmental Policy Research, Policy Research Center for Environment and Economy, Ministry of Ecology and Environment of the People’s Republic of China, Beijing 100029, China
    2 Research Center for Environmental & Ecology Strategic Planning and Regional Development, Policy Research Center for Environment and Economy, Ministry of Ecology and Environment of the People’s Republic of China, Beijing 100029, China
    3 Chongqing Academy of Environmental Protection Sciences, Chongqing 400020, China
  • Received:2020-09-14 Revised:2020-12-20 Online:2021-05-30 Published:2021-06-01
  • Contact: FENG Xiang-Zhao E-mail:wangmin8556@126.com;feng.xiangzhao@prcee.org

Abstract:

Industrial sectors characterized by high energy consumption are considered as important sources of atmospheric pollutants and greenhouse gases (GHGs). In order to facilitate the integrated management, this paper combined with the practice in the industrial sectors in Chongqing implemented by Ministry of Ecology and Environment, took NOx as a case pollutant to calculate and analyze the synergy effect between NOx removal and GHGs emissions in the industrial sectors. The results are as follows. The effect of NOx reduction by applying end-of pipe technology is negative to control GHGs, that is, the removal of 1 t NOx in the industrial enterprises will directly or indirectly increase CO2 emissions by 1.811 t. The adoption of SNCR technology and the selection of ammonia and other non-urea denitration agents can help to reduce indirect CO2 emissions from the process and electricity. In 2017, the reduction of NOx in Chongqing’s industrial enterprises increased CO2 emissions by 525.7 kt, accounting for 0.3% of Chongqing’s total CO2 emissions from energy activities. If the power emission factor is reduced by 1% or 5%, the synergetic degree of NOx reduction towards GHGs would be raised by 0.9% or 4.3%, respectively, and the synergistic effect of cement manufacturing is improved the most. It is essential to reduce the negative synergy effect of NOx removal technology by decreasing the use of urea and promoting the development of low carbon power.

Key words: Industrial enterprises, Air pollutants, NOx, Greenhouse gas, Co-control

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