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Na H, Yuan Y, Du T, Zhang T, Zhao X, Sun J, Qiu Z, Zhang L. Multi-process production occurs in the iron and steel industry, supporting 'dual carbon' target: An in-depth study of CO 2 emissions from different processes. J Environ Sci (China) 2024; 140:46-58. [PMID: 38331514 DOI: 10.1016/j.jes.2023.03.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 02/10/2024]
Abstract
Reducing CO2 emissions of the iron and steel industry, a typical heavy CO2-emitting sector, is the only way that must be passed to achieve the 'dual-carbon' goal, especially in China. In previous studies, however, it is still unknown what is the difference between blast furnace-basic oxygen furnace (BF-BOF), scrap-electric furnace (scrap-EF) and hydrogen metallurgy process. The quantitative research on the key factors affecting CO2 emissions is insufficient. There is also a lack of research on the prediction of CO2 emissions by adjusting industrial structure. Based on material flow analysis, this study establishes carbon flow diagrams of three processes, and then analyze the key factors affecting CO2 emissions. CO2 emissions of the iron and steel industry in the future is predicted by adjusting industrial structure. The results show that: (1) The CO2 emissions of BF-BOF, scrap-EF and hydrogen metallurgy process in a site are 1417.26, 542.93 and 1166.52 kg, respectively. (2) By increasing pellet ratio in blast furnace, scrap ratio in electric furnace, etc., can effectively reduce CO2 emissions. (3) Reducing the crude steel output is the most effective CO2 reduction measure. There is still 5.15 × 108-6.17 × 108 tons of CO2 that needs to be reduced by additional measures.
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Affiliation(s)
- Hongming Na
- SEP Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China; School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Yuxing Yuan
- SEP Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China; School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Tao Du
- SEP Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China; School of Metallurgy, Northeastern University, Shenyang 110819, China.
| | - Tianbao Zhang
- School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Xi Zhao
- School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Jingchao Sun
- SEP Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China; School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Ziyang Qiu
- SEP Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China; School of Metallurgy, Northeastern University, Shenyang 110819, China
| | - Lei Zhang
- SEP Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China; School of Metallurgy, Northeastern University, Shenyang 110819, China
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