Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO<sub>2</sub> content of flue gas

CHANG Dongyuan; TANG Siyang; ZHONG Shan; LU Houfang; LIANG Bin

doi:10.12434/j.issn.2097-2547.20240141

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Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO₂ content of flue gas

- Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO₂ content of flue gas
- Vol. 49, Issue 7, Pages: 69-75(2024)
- 作者机构：
  
  1.四川大学化学工程学院，四川成都 610065
  2.四川大学新能源与低碳技术研究院，四川成都 610065
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240141
  CLC： TQ021.8
- Published：25 July 2024，
  
  Received：04 April 2024，
  
  Revised：13 May 2024，
- 稿件说明：
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常栋渊,唐思扬,钟山等.不同烟气CO₂含量下近等温相变捕集工艺调节策略模拟分析[J].低碳化学与化工,2024,49(07):69-75.

CHANG Dongyuan,TANG Siyang,ZHONG Shan,et al.Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO₂ content of flue gas[J].Low-carbon Chemistry and Chemical Engineering,2024,49(07):69-75.
常栋渊,唐思扬,钟山等.不同烟气CO₂含量下近等温相变捕集工艺调节策略模拟分析[J].低碳化学与化工,2024,49(07):69-75. DOI： 10.12434/j.issn.2097-2547.20240141.

CHANG Dongyuan,TANG Siyang,ZHONG Shan,et al.Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO₂ content of flue gas[J].Low-carbon Chemistry and Chemical Engineering,2024,49(07):69-75. DOI： 10.12434/j.issn.2097-2547.20240141.

摘要

相变捕集工艺具有较低的再生能耗，但在实际生产中，上游工艺产生的烟气中CO

含量（物质的量分数，下同）不稳定，可导致工艺的整体能耗发生变化，因此需研究不同烟气CO

含量下该工艺参数的调节策略。通过Python语言调用Aspen Plus对近等温CO

相变捕集工艺进行了模拟计算，分析了不同CO

含量下吸收塔温度（

）、解吸塔温度（

）、液/气比（

）、胺浓度（

）、解吸液循环比（

）对再生能耗和CO

捕集率的影响以及相

应的调节策略。结果表明，

对CO

捕集率的影响最显著，当CO

含量为5.00%时，其相关性系数最高（74.78%）；

对再生能耗的影响最显著，当CO

含量为20.00%时，其相关性系数最高（-55.26%）。在维持CO

捕集率大于等于90.00%的条件下，随着CO

含量从5.00%升高至20.00%，再生能耗从2.35 GJ/t降低至2.13 GJ/t。此外，应根据CO

含量对

、

、c

和

进行相应调节，以确保CO

捕集率大于等于90.00%并且再生能耗最低。

Abstract

The CO

phase change capture process has low regeneration energy consumption

but in actual production

the CO

content (mole fraction

the same below) in flue gas generated by the upstream process is unstable

which can lead to changes in the overall energy consumption of the process. Therefore

it is necessary to study the adjustment strategies of the process parameters under different CO

content of flue gas. Using Python to invoke Aspen Plus to simulate the near isothermal CO

capture technology

and the effects of adsorption tower temperature (

)

desorption tower temperature (

)

liquid/gas ratio (

)

amine concentration (

) and desorption liquid circulation ratio (

) on the regeneration energy consumption and CO

capture rate and the corresponding regulation strategies were analyzed. The results show that

has the most significant effect on CO

capture rate

and the correlation coefficient is the highest (74.78%) when the CO

content is 5.00%.

has the most significant impact on regeneration energy consumption

and when CO

content is 20.00%

its correlation coefficient is the highest (-55.26%). With the CO

content increases from 5.00% to 20.00%

the regeneration energy consumption decreases from 2.35 GJ/t to 2.13 GJ/t

under the condition that the CO

capture rate is greater than 90.00%. In addition

and

should be adjusted accordingly according to CO

content to ensure that CO

capture rate is greater than 90.00% and the regeneration energy consumption is lowest.

关键词

CO2捕集工艺过程模拟CO2含量热泵系统参数调节

Keywords

CO2 capture processprocess simulationCO2 contentheat pump systemparameters adjustment

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Related Institution

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四川大学化工学院成都610065

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Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO2 content of flue gas

DOI：10.12434/j.issn.2097-2547.20240141

摘要

Abstract

关键词

Keywords

references

Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO₂ content of flue gas