气候变化领域集成服务门户(CCPortal): Minimizing CO2emissions with renewable energy: A comparative study of emerging technologies in the steel industry

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DOI	10.1039/d0ee00787k
	Minimizing CO2emissions with renewable energy: A comparative study of emerging technologies in the steel industry
	Flores-Granobles M.; Saeys M.
发表日期	2020
ISSN	1754-5692
起始页码	1923
结束页码	1932
卷号	13 期号:7
英文摘要	CO2 emissions from the steel industry are amongst the most difficult to abate, since carbon is used as a stoichiometric reducing agent in most steel mills. This carbon ends up as a CO/CO2 mixture in the steel mill gases, which are combusted to generate heat, electricity, and more CO2. Strategies to capture and store (CCS), utilize (CCU) or avoid CO2 in steel production exist, but are highly dependent on the availability of renewable electricity for the production of low-carbon H2. Steel mill gas contains energy, and can thus be re-used more easily than combustion gas or process gas from the cement industry. In this study, we evaluate several strategies to reduce CO2 emissions in the steel industry and rank them according to their renewable electricity requirement. We propose the following steps: (1) shut down the steel plant's power plant, since it produces electricity with a carbon intensity that is even higher than coal-based power plants; (2) replace steel mill gas with natural gas to generate heat within the steel mill; (3) recover the reducing gases, H2 and CO, from the steel mill gases: E.g., using pressure swing adsorption to obtain a H2-rich stream from COG, and sorption-enhanced water gas shift to obtain a H2-rich stream and a pure CO2 stream from BFG and BOFG; (4) the recovered H2 converts some of the CO2 to methanol, excess CO2 is stored. The proposed CCUS scenario can retrofit existing infrastructure, uses proven technology and reduces CO2 emissions by 70% for a marginal renewable electricity demand. Other energy-intensive alternatives have the potential to reduce CO2 emissions by 85%, but require an order-of-magnitude more renewable electricity. © 2020 The Royal Society of Chemistry.
语种	英语
scopus关键词	Carbon dioxide; Cement industry; Coal combustion; Electric power generation; Gas industry; Gases; Metal recovery; Natural gasoline plants; Power plants; Steelmaking; Water gas shift; Coal based power plants; Comparative studies; Emerging technologies; Pressure swing adsorption; Renewable electricity; Renewable energies; Sorption enhanced water gas shift; Steel production; Low carbon steel; carbon dioxide; carbon emission; comparative study; emission control; industrial emission; iron and steel industry; renewable resource
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162455
作者单位	Laboratory for Chemical Technology, Ghent University, Technologiepark 125, Ghent, B-9052, Belgium
推荐引用方式 GB/T 7714	Flores-Granobles M.,Saeys M.. Minimizing CO2emissions with renewable energy: A comparative study of emerging technologies in the steel industry[J],2020,13(7).
APA	Flores-Granobles M.,&Saeys M..(2020).Minimizing CO2emissions with renewable energy: A comparative study of emerging technologies in the steel industry.Energy and Environmental Science,13(7).
MLA	Flores-Granobles M.,et al."Minimizing CO2emissions with renewable energy: A comparative study of emerging technologies in the steel industry".Energy and Environmental Science 13.7(2020).