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MEA/正丁醇/水相变吸收剂捕集CO的实验研究

Experimental study on CO capture by MEA/-butanol/HO phase change absorbent.

作者信息

Hu Yanlong, Wang Qiang, Hu Dingkai, Zhang Yingshuang, Furqan Muhammad, Lu Shijian

机构信息

State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources, Xinjiang Key Laboratory of Coal Cleaning Conversion & Chemical Engineering, Xinjiang Uyghur Autonomous Region, School of Chemical Engineering and Technology, Xinjiang University Urumqi Xinjiang 830017 P. R. China

Institute of Carbon Neutralization, China University of Mining and Technology, School of Chemical Engineering Xuzhou Jiangsu 221116 China.

出版信息

RSC Adv. 2024 Jan 19;14(5):3146-3157. doi: 10.1039/d3ra07193f. eCollection 2024 Jan 17.

DOI:10.1039/d3ra07193f
PMID:38249666
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10797326/
Abstract

Monoethanolamines (MEAs) are widely used for CO capture, but their regeneration energy consumption is very high. CO Phase change absorbents (CPCAs) can be converted into CO-rich and CO-lean phases after absorbing CO, and the regeneration energy consumption can be reduced because only the CO-rich phase is thermally desorbed. In this paper, a novel CPCA with the composition "MEA/-butanol/HO (MNBH)" is proposed. Compared with the reported MEA phase change absorbent, the MNBH absorbent has higher CO absorption capacity, smaller absorbent viscosity and CO-rich phase volume. The MNBH absorbent has the highest CO absorption capacity of 2.5227 mol CO per mol amine at a mass ratio of 3 : 4 : 3. The CO desorption efficiency reaches 89.96% at 120 °C, and the CO regeneration energy consumption is 2.6 GJ tCO, which is about 35% lower than that of the 30 wt% MEA absorbent. When the mass ratio of MNBH absorbent was 3 : 6 : 1, the CO recycling capacity was 4.1918 mol CO L, which is 76% higher than that of the conventional 30 wt% MEA absorbent. The phase change absorbent developed in this paper can reduce the desorbent volume by about 50% and has good absorption performance for CO in flue gas.

摘要

单乙醇胺（MEA）被广泛用于二氧化碳捕集，但其再生能耗非常高。二氧化碳相变吸收剂（CPCA）在吸收二氧化碳后可转化为富二氧化碳相和贫二氧化碳相，且由于只需对富二氧化碳相进行热脱附，因此可降低再生能耗。本文提出了一种组成为“MEA/叔丁醇/H₂O（MNBH）”的新型CPCA。与已报道的MEA相变吸收剂相比，MNBH吸收剂具有更高的二氧化碳吸收容量、更小的吸收剂粘度和富二氧化碳相体积。在质量比为3∶4∶3时，MNBH吸收剂的二氧化碳吸收容量最高，为每摩尔胺2.5227摩尔二氧化碳。在120℃时，二氧化碳脱附效率达到89.96%，二氧化碳再生能耗为2.6吉焦/吨二氧化碳，比30重量%的MEA吸收剂低约35%。当MNBH吸收剂的质量比为3∶6∶1时，二氧化碳循环容量为4.1918摩尔二氧化碳/升，比传统的30重量%的MEA吸收剂高76%。本文研发的相变吸收剂可使解吸剂体积减少约50%，且对烟气中的二氧化碳具有良好的吸收性能。

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本文引用的文献

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Environ Sci Technol. 2019 Apr 16;53(8):4470-4479. doi: 10.1021/acs.est.9b00040. Epub 2019 Mar 29.
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Paris Agreement climate proposals need a boost to keep warming well below 2 °C.《巴黎协定》气候提案需要进一步推动，才能将升温控制在 2°C 以下。
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Decreasing the Viscosity in CO2 Capture by Amino-Functionalized Ionic Liquids through the Formation of Intramolecular Hydrogen Bond.
通过形成分子内氢键降低氨基功能化离子液体捕集二氧化碳时的粘度
J Phys Chem B. 2016 Mar 17;120(10):2807-13. doi: 10.1021/acs.jpcb.5b10553. Epub 2016 Mar 8.
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Novel shortcut estimation method for regeneration energy of amine solvents in an absorption-based carbon capture process.新型胺溶剂在吸收式碳捕集过程中再生能量的快捷估计方法。
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