用于碳捕集的胺基两相吸收剂筛选及性能研究

张立欣; 张霜霜; 张玉玮; 陈经敏; 安搏茹; 张磊

doi:10.13205/j.hjgc.202410023

用于碳捕集的胺基两相吸收剂筛选及性能研究

doi: 10.13205/j.hjgc.202410023

1. 陕西科技大学环境科学与工程学院, 西安 710021;
2. 中国重型机械研究院股份公司, 西安 710018

基金项目:

宁夏富油煤赋存规律及清洁高效利用研究(2023BEGO2058)

国家自然科学基金项目(22076110)

详细信息

作者简介:
张立欣(1984-),男,博士,副教授,主要从事大气污染物控制及固废资源化研究。Zhanglixin@sust.edu.cn

通讯作者:
张立欣(1984-),男,博士,副教授,主要从事大气污染物控制及固废资源化研究。Zhanglixin@sust.edu.cn

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出版历程
- 收稿日期: 2023-12-20
- 网络出版日期: 2024-11-30

SCREENING AND PERFORMANCE EVALUATION OF AN AMINE-BASED BIPHASIC SOLVENT FOR CARBON CAPTURE

1. School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China;
2. China National Heavy Machinery Research Institute Co., Ltd., Xi'an 710018, China

摘要

摘要: 相较于传统有机胺吸收剂30%MEA,两相吸收剂在降低CO₂捕集能耗方面具有更为显著的发展潜力。选用具有不同氨基结构的乙醇胺(MEA)、羟乙基乙二胺(AEEA)、二乙烯三胺(DETA)和三乙烯四胺(TETA)为主吸收剂,分别与分相剂二乙氨基乙醇(DEEA)和水,以1∶2∶1(质量比)复配构建4种两相吸收剂。对其分相性能、吸收-再生性能及黏度特性进行比较研究,发现DEEA+DETA组合为最具开发潜力的两相吸收剂,进一步对其再生能耗及循环稳定性进行深入考察。结果表明:DEEA+DETA两相吸收剂具有较大分相负荷范围和适中的黏度,其吸收负荷为3.26 mol/L,循环容量达2.52 mol/L,再生能耗低至2.55 GJ/t CO₂,比30%MEA降低了32.9%,且循环稳定性良好。
- CO₂捕集 /
- 两相吸收剂 /
- 再生能耗 /
- 吸收-再生性能 /
- 循环性能
Abstract: Compared with the traditional organic amine absorber, 30% MEA, the biphasic solvent has more significant development advantages in reducing the energy consumption of CO₂ capture. In this paper, monoethanolamine (MEA), hydroxyethyl ethylenediamine (AEEA), diethylenetriamine (DETA) and triethylenetetramine (TETA) with different amino structures were selected as the main absorbers and compounded with the phase-splitting agent diethylethanolamine (DEEA) and water in the ratio of 1∶2∶1, to construct four different biphasic absorption systems. Through a comparative study of their phase splitting performance, absorption-desorption performance, and viscosity characteristics, DEEA+DETA was selected as the most promising biphasic absorption system, and its regeneration energy consumption and cycle stability were investigated in detail. The results showed that the biphasic solvent of DEEA+DETA, with a wide range of split-phase loading and moderate viscosity, has an absorption load of up to 3.26 mol/L, a cyclic capacity of 2.52 mol/L, and a low regeneration energy consumption of 2.55 GJ/t CO₂, 32.9% lower than that of 30% MEA. It still maintained high absorption-desorption performance and good cyclic stability after 10 cycles.
- CO₂ capture /
- biphasic solvent /
- regeneration energy consumption /
- absorption-desorption performance /
- cycling performance

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