Improved CO<sub>2</sub> Capture Method by Absorption

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Improved CO₂ Capture Method by Absorption

更新时间：2025-07-09

- Improved CO₂ Capture Method by Absorption
- Vol. 42, Issue 11, Pages: 1413-1417(2008)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ021.8
- Online First：10 November 2008，
  
  Published：2008
- 稿件说明：
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Improved CO₂ Capture Method by Absorption[J]. 2008, 42(11): 1413-1417.
DOI：

Improved CO₂ Capture Method by Absorption[J]. 2008, 42(11): 1413-1417. DOI：

摘要

为了研究利用乙醇胺(MEA)溶液从化石燃料燃烧电厂的尾气中分离CO

来减小温室气体的排放

采用ASPEN PLUS软件结合电厂参数建立了MEA溶液吸收CO

的流程.流程中的反应采用Eletrolyte-NRTL 模型

吸收塔、解吸塔采用RADFRAC模型.通过模拟分析操作参数变化对CO

减排流程的影响

获得了最优操作点

同时对流程进行了改进

对压缩机级间热能回收进行了探讨.通过优化得到流程的最优操作点:MEA的质量分数为40%

的回收率为99.2%

解吸塔操作压力为0.2 MPa

贫液负载量为0.131.回收压缩机级间热能及改进操作条件后

最优操作工况下CO

的解吸能耗为2.947 GJ/t

减排成本为344.0 元/t

电厂效率由减排前的45%仅降为32.75%.

Abstract

A process of CO

capture was built based on an existing power plant by ASPEN PLUS for studying CO

capture from flue gas of fossil fuel-fired power plant. Eletrolyte-NRTL model was used for the reaction of the process

and the absorber and stripper were built by RADFRAC model. The effect on CO

removal by changing the operation parameters was analyzed

and the optimal operation condition was found. In addition

the performance was improved by recycling the interstage thermal energy of the compressors. The optimal operation condition was obtained when monoethanolamine(MEA)mass fraction was 40%

removal rate was 99.2%

operation pressure of stripper was 0.2 MPa

and lean solvent

loading was 0.131. The results show that by combining the optimal operation condition with recycling interstage energy

the thermal energy requirement of the process is 2.947 GJ/t

the cost of CO

removal is 344.0 RMB/t

and the efficiency of power plant decreases from 45% to 32.75%.

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references

ABU-ZAHRA M R, FERON P H. 二氧化碳输送过程的优化[J]. 西安交通大学学报,2005,39(3):274-277.ZHANG Zaoxiao, FENG Xiao. Optimization of CO2 transmission processes [J].Journal of Xi'an Jiaotong University,2005,39(3):274-277.

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Improved CO2 Capture Method by Absorption

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Improved CO₂ Capture Method by Absorption