Research on co-control effectiveness evaluation of energy saving and emission reduction measures in China’s iron and steel industry

doi:10.12006/j.issn.1673-1719.2020.287

Abstract

Abstract:

An evaluation was conducted on the co-control effect of energy-saving and emission reduction measures in the iron and steel industry. The results could be used to support the co-control planning of local air pollutants and greenhouse gases reductions. The emission factor method was used to calculate the emission reduction of various local air pollutants and greenhouse gases by different measures. Various emission reductions were then converted into Integrated Air Pollutant Co-control Emission Reduction (ICER). Co-control effects coordinate system, co-control cross elasticity, unit pollutant reduction cost and the marginal abatement cost curve were applied to examine the co-control effects for different measures. The results show that, in 2025, the 28 measures in the iron and steel industry can reduce SO₂ emission by 518.0 kt, NOx by 713.5 kt, PM10 by 290.7 kt, and CO₂ by 664 Mt. Except for end-of-pipe decarbonization and pollution reduction measures that do not have co-control effects, the other 25 measures have good co-control effectiveness. The “High-Temperature/High-Pressure Boiler Technologies for Coke (T3)” has the lowest cost, and the “Ultra-Low Emission Retrofitting (T28)” has the highest cost. Most energy-efficiency improvement measures, raw (fuel) material substitution measures can bring benefits (or reduce costs). Structural adjustment and energy-efficiency improvement measures have the greatest potential for emission reduction. In the future, the co-control technology development and co-control planning in the iron and steel industry should be strengthened to realize the optimization of the co-benefits of local air pollutants and greenhouse gases synergetic reductions.

Key words: Iron and steel industry, Co-control, Effectiveness evaluation

GAO Yu-Bing, XING You-Kai, HE Feng, KUAI Peng, MAO Xian-Qiang. Research on co-control effectiveness evaluation of energy saving and emission reduction measures in China’s iron and steel industry[J]. Climate Change Research, 2021, 17(4): 388-399.

Figures/Tables 13

Table 1 Weight coefficients for converting local air pollutants emission reduction and CO2 emission reduction into ICER

Table 2 Classification and market share of selected measures in the iron and steel industry of China

Table 3 Conversion coefficients of the volume of intermediate products and raw material corresponding to crude steel in China’s iron and steel industry

Table 4 Emission coefficients of local air pollutants in the iron and steel industry in 2015

Table 5 CO2 and air pollutant emission coefficients by process in the iron and steel industry in 2015 g/kgce

Table 6 Emission reduction factors for energy recovery

Table 7 The emission reduction of selected measures in the iron and steel industry in 2025 (relative to 2015)

Fig. 1 Contribution of energy saving and emission reduction measure types to Integrated Air Pollutant Co-control Emission Reduction (ICER)

Fig. 2 Integrated air pollutants emission of iron and steel industry in 2015, projected integrated air pollutants emission and reduction in 2025

Fig. 3 The co-control coordinate system of 28 measures in the iron and steel industry (a) and partially enlarged view (b) in 2025

Table 8 Results of the co-control cross elasticity of control measures in the iron and steel industry

Fig. 4 Unit cost of integrated air pollutant emission reduction and priority order of selected measures in the iron and steel industry

Fig. 5 The marginal abatement cost curve of integrated air pollutants of selected measures in the iron and steel industry in 2025

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