【摘要】 高炉烟气进行碳捕集可有效降低高炉工序的碳排放。采用化学吸收的方式进行高炉烟气碳捕集，对几种主要吸收剂进行高炉烟气碳捕集能力研究。通过自主搭建的模拟碳捕集试验装置，研究氨水、乙醇胺（MEA）等吸收剂对20%CO₂含量的高炉烟气的碳捕集情况，分析其碳捕集能力与再生再利用能力。结果表明，氨水的碳捕集能力最强，每千克溶液捕集CO₂可达105.4 L,比捕集量最少的MEA溶液高出了71.38%。此外，各吸收剂CO₂的解吸率可达92%以上，仅MEA解吸率为68.94%。重复利用的吸收剂碳捕集能力也达原先的90%以上。同时研究发现，高炉烟气中除尘灰会使有机胺吸收剂在升温解吸过程中降解，使碳捕集能力降低20%左右。本文可为后续开发适宜高炉工序的吸收剂与高炉碳捕集工艺奠定理论基础。更多还原

【Abstract】 Carbon capture of blast furnace flue gas can effectively reduce the carbon emissions of blast furnace process.The carbon capture of blast furnace flue gas was carried out by chemical absorption, and the carbon capture capacity of blast furnace flue gas of several main absorbents was studied.Through the self-built simulated carbon capture experimental device, the carbon capture of blast furnace flue gas with 20% CO₂ content by absorbents such as ammonia hydroxide and ethanolamine（MEA）was studied, and its carbon capture capacity and regeneration and reuse capacity were analyzed.The results show that ammonia hydroxide has the strongest CO₂ capture capacity, reaching 105.4 L of CO₂ per kilogram solution, which is 71.38 % higher than that of MEA solution with the least capture capacity.In addition, the CO₂ desorption rate of each absorbent can reach more than 92%,and only the MEA desorption rate is 68.94%.The carbon capture capacity of the reused absorbent also reaches more than 90% of the original.At the same time, it is found that the dust in the blast furnace flue gas will degrade the organic amine absorbent during the process of heating and desorption, and reduce the carbon capture capacity by about 20%.This paper can lay a theoretical foundation for the subsequent development of absorbent and blast furnace carbon capture process suitable for blast furnace process.更多还原