以MEA为主体的混合胺溶液对烧结烟气CO<sub>2</sub>吸收性能的研究

杨淑钦; 王珲; 张文伯; 董源; 朱晓华

doi:10.13205/j.hjgc.202509017

以MEA为主体的混合胺溶液对烧结烟气CO₂吸收性能的研究

doi: 10.13205/j.hjgc.202509017

杨淑钦^1,2,
王珲^1,2,
张文伯^1,2,
董源^1,2,
朱晓华^1,2,

1. 中冶建筑研究总院有限公司, 北京 100088;
2. 钢铁工业环境保护国家重点实验室, 北京 102600

基金项目:

中国五矿科技专项计划项目（2022ZXA04）

详细信息

作者简介:
杨淑钦（1998—），女，硕士研究生，主要研究方向为CO₂化学吸收。yangshuqin@cribc.com

通讯作者:
朱晓华（1978—），男，正高级工程师。zhuxiaohua@cribc.com

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- 被引次数: 0
出版历程
- 收稿日期: 2025-02-06
- 网络出版日期: 2025-11-05
- 刊出日期: 2025-09-01

Study on CO₂ absorption performance of sintering flue gas using MEA-based mixed amine solutions

YANG Shuqin^1,2,
WANG Hui^1,2,
ZHANG Wenbo^1,2,
DONG Yuan^1,2,
ZHU Xiaohua^{1,2
,}

1. Central Research Institute of Building and Construction, Co., Ltd., MCC Group, Beijing 100088, China;
2. State Key Laboratory of Iron and Steel Industry Environmental Protection, Beijing 102600, China

摘要

摘要: 我国的双碳目标对钢铁行业碳减排提出要求，钢铁行业的烧结工序碳排放占比达40%。目前对应用于工业行业的CO₂吸收方法以化学吸收为主，而目前面对烧结烟气的化学吸收研究较少。针对于烧结烟气这种复杂烟气，需要更高效率的CO₂吸收剂，对代表性烧结机进行烧结烟气成分检测，结果表明：烧结烟气中CO₂的浓度更低，SO₂对CO₂去除率的影响更大，SO₂比NO₂更容易与胺发生反应，SO₂、NO₂等杂质影响吸收效果。为探究不同化学吸收剂对烧结烟气中CO₂的吸收率，以吸收剂的质量分数、温度为单因素控制得出最佳吸收工艺条件，实验确定采用吸收效率最高的30%MEA溶液为主胺，采用MEA-MDEA、MEA-PZ、MEA-K₂CO₃ 3种二元复合溶液，以及MEA-PZ-MDEA三元复合溶液，分析其在不同参数条件下的CO₂吸收性能。结果表明，吸收CO₂性能的优劣顺序为MEA-PZ- MDEA、MEA-PZ、MEA-MDEA以及 MEA -K₂CO₃。
- 烧结烟气 /
- 二氧化碳 /
- 混合胺 /
- 吸收效率 /
- 二元混合物 /
- 三元混合物 /
- 化学吸收
Abstract: China's Dual Carbon Goals have imposed stringent requirements on carbon emission reduction in the steel industry. The sintering process， a critical step in steel production， contributes up to 40% of the industry's total carbon emissions. Currently， chemical absorption is the predominant method for CO₂ capture in industrial applications. However， research on chemical absorption for sintering flue gas， which is characterized by its complex composition， remains limited. Sintering flue gas typically contains lower CO₂ concentrations and higher levels of impurities， such as SO₂ and NO₂， which significantly affect CO₂ capture efficiency. Among these impurities， SO₂ has a more pronounced impact than NO₂ due to its higher reactivity with amine-based absorbents， leading to reduced absorption performance. To address these challenges， this study focused on developing high-efficiency CO₂ absorbents tailored for sintering flue gas. The research began with an analysis of the composition of sintering flue gas from a representative sintering machine， revealing that the low CO₂ concentration and the presence of SO₂ and NO₂ are critical factors influencing absorption efficiency. To investigate the CO₂ absorption efficiency of different chemical absorbents for sintering flue gas， this study first determined the optimal process conditions by controlling the mass fraction of absorbents and temperature as single factors. Experiments identified the 30% MEA solution with the highest absorption efficiency as the primary amine. Subsequently， three binary composite solutions （MEA-MDEA， MEA-PZ， and MEA-K₂CO₃） and one ternary composite solution （MEA-PZ-MDEA） were adopted to analyze the CO₂ absorption performance under different conditions.The results demonstrated that the CO₂ absorption performance followed the order of MEA-PZ-MDEA > MEA-PZ > MEA-MDEA > MEA-K₂CO₃. The ternary blend （MEA-PZ-MDEA） exhibited the highest absorption efficiency， attributed to the synergistic effects of PZ's fast reaction kinetics and MDEA's low regeneration energy requirements. Additionally， the study highlights the importance of optimizing absorbent composition and operating conditions to mitigate the adverse effects of SO₂ and NO₂ on CO₂ capture. It provides valuable insights into the development of advanced absorbents for sintering flue gas， offering a potential pathway for the steel industry to achieve significant carbon emission reductions. Future work should focus on scaling up the process and further improving the absorbents' resistance to impurities.
- sintering flue gas /
- CO₂ /
- mixed amines /
- absorption efficiency /
- binary mixture /
- ternary mixture /
- chemical absorption

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参考文献(20)

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