Carbon emissions in China’s steel industry from a life cycle perspective:Carbon footprint insights  

作　　者：Xiaocong Song Shuai Du Chenning Deng Peng Shen Minghui Xie Ci Zhao Chen Chen Xiaoyu Liu 

机构地区：[1]State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China [2]Beijing Key Laboratory of Water Resources&Environmental Engineering,China University of Geosciences(Beijing),Beijing 100083,China [3]Chinese Research Academy of Environmental Sciences Environmental Technology&Engineering Co.Ltd.,Beijing 100012,China

出　　处：《Journal of Environmental Sciences》2025年第2期650-664,共15页环境科学学报(英文版)

基　　金：supported by Ningbo’s major scientific and technological breakthrough project“Research and Demonstration on the Technology of Collaborative Disposal of Secondary Ash in Typical Industrial Furnaces” (No.20212ZDYF020047);the central balance fund project“Research on Carbon Emission Accounting and Emission Reduction Potential Assessment for the Whole Life Cycle of Iron and Steel Industry” (No.2021-JY-07).

摘　　要：China is the most important steel producer in the world,and its steel industry is one of themost carbon-intensive industries in China.Consequently,research on carbon emissions from the steel industry is crucial for China to achieve carbon neutrality and meet its sustainable global development goals.We constructed a carbon dioxide(CO_(2))emission model for China’s iron and steel industry froma life cycle perspective,conducted an empirical analysis based on data from2019,and calculated the CO_(2)emissions of the industry throughout its life cycle.Key emission reduction factors were identified using sensitivity analysis.The results demonstrated that the CO_(2)emission intensity of the steel industry was 2.33 ton CO_(2)/ton,and the production and manufacturing stages were the main sources of CO_(2)emissions,accounting for 89.84%of the total steel life-cycle emissions.Notably,fossil fuel combustion had the highest sensitivity to steel CO_(2)emissions,with a sensitivity coefficient of 0.68,reducing the amount of fossil fuel combustion by 20%and carbon emissions by 13.60%.The sensitivities of power structure optimization and scrap consumption were similar,while that of the transportation structure adjustment was the lowest,with a sensitivity coefficient of less than 0.1.Given the current strategic goals of peak carbon and carbon neutrality,it is in the best interest of the Chinese government to actively promote energy-saving and low-carbon technologies,increase the ratio of scrap steel to steelmaking,and build a new power system.

关 键 词：Iron and steel industry Life cycle Carbon dioxide(CO_(2))emissions Carbon footprint China 

分 类 号：TG1[金属学及工艺—金属学]