二甘醇胺CO<sub>2</sub>富液解吸宏观动力学研究

曾惜; 唐思扬; 钟山; 李红娇; 鲁峰; 梁斌

doi:10.12434/j.issn.2097-2547.20250175

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二甘醇胺CO₂富液解吸宏观动力学研究

二氧化碳捕集与利用 | 更新时间：2026-03-19

- 二甘醇胺CO₂富液解吸宏观动力学研究
- Study on macroscopic kinetics of desorption of CO₂-enriched DGA solution
- 低碳化学与化工 2026, 51(3): 68-77.
- 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 610207
- 作者简介：
  
  曾惜（1998—），硕士研究生，研究方向为CO2捕集工艺，E-mail：384488670@qq.com。
  唐思扬（1987—），博士，副教授，研究方向为化学反应工程及催化反应构效关系，E-mail：siyangtang@scu.edu.cn。
- 基金信息：
  
  四川省先进建筑材料产教融合创新示范平台(川材教[2022]106号)
- DOI：10.12434/j.issn.2097-2547.20250175
  中图分类号： TQ021.8
- 收稿：2025-04-11，
  
  修回：2025-05-14，
  
  纸质出版：2026-03-25
- 稿件说明：
移动端阅览
曾惜,唐思扬,钟山等.二甘醇胺CO₂富液解吸宏观动力学研究[J].低碳化学与化工,2026,51(3):68-77.

ZENG Xi,TANG Siyang,ZHONG Shan,et al.Study on macroscopic kinetics of desorption of CO₂-enriched DGA solution[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(3):68-77.
曾惜,唐思扬,钟山等.二甘醇胺CO₂富液解吸宏观动力学研究[J].低碳化学与化工,2026,51(3):68-77. DOI： 10.12434/j.issn.2097-2547.20250175.

ZENG Xi,TANG Siyang,ZHONG Shan,et al.Study on macroscopic kinetics of desorption of CO₂-enriched DGA solution[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(3):68-77. DOI： 10.12434/j.issn.2097-2547.20250175.

摘要

醇胺溶液是工业领域常用的CO

化学吸收剂。醇胺富液的CO

解吸动力学是评价醇胺类吸收剂的重要指标，研究醇胺富液的CO

解吸动力学和建立相应动力学模型对指导醇胺类吸收剂开发及优化具有重要意义。以富集CO

的5 mol/L二甘醇胺（DGA）溶液（简称“DGA富液”）为研究对象，采用连续搅拌反应装置测定其CO

解吸速率，同时使用反应器内旋转雷诺数（

）和解吸温度分别作为衡量解吸过程中湍动强度和温度的状态参数，对DGA富液的CO

解吸动力学方程进行拟合。结果表明，与反应器内

= 0相比，提高湍动强度（

= 20000）可使DGA富液宏观解吸反应热降低6.21%，使表观活化能降低2.65%。在间歇解吸实验中，提高湍动强度可使DGA富液解吸CO

平衡负荷降低3.82%~9.16%（以转速200 r/min为基准），将解吸温度从353 K升高至372 K，可使DGA富液解吸CO

平衡负荷降低34.93%~39.64%。在连续解吸实验中，提高湍动强度可使CO

稳态解吸速率加快6.46%~79.63%（以转速200 r/min为基准），将富液解吸温度从347 K升高至376 K，可使CO

稳态解吸速率加快约17倍。在解吸温度为347~376 K、

为846~7789及CO

负荷为1.35~2.68 mol/L的条件下，DGA富液的CO

解吸动力学模型为

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175484&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175460&type=

149.60600281

18.37266731

。其中，

为CO

解吸速率，

为理想气体常数，

des

为解吸温度，

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175500&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175476&type=

9.99066734

3.30200005

为DGA富液CO

负荷，

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175489&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175501&type=

5.33400011

3.55599999

为DGA富液CO

平衡浓度，

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175466&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175490&type=

6.09600019

3.47133350

为解吸平衡时DGA浓度。

Abstract

Alcohol-amine solvents are commonly used as CO

chemical absorbents in industrial fields. The CO

desorption kinetics of alcohol-amine rich solution is an important index for evaluating alcohol-amine absorbents. Studying the CO

deso

rption kinetics of alcohol-amine rich solution and establishing corresponding kinetic models are of significant importance for guiding the development and optimization of alcohol-amine absorbents. Using 5 mol/L diethylene glycolamine (DGA) solution enriched with CO

(“DGA rich solution” for short) as the target

and a continuous stirred reactor was used to determine their CO

desorption rate. The rotating Reynolds number (

) and desorption temperature in the reactor were selected as the state parameters to measure the turbulence intensity and temperature in desorption process

respectively

and the kinetic equation for CO

desorption of DGA rich solution was fitted. The results indicate that compared to

= 0 in reactor

increasing the turbulence intensity (

= 20000) can reduce the heat of macroscopic desorption reaction of DGA rich solution by 6.21% and reduce the apparent activation energy by 2.65%. In the intermittent desorption experiments

increasing the turbulence intensity can reduce the CO

equilibrium loading of DGA rich solution by 3.82% to 9.16% (rotational speed of 200 r/min as the reference)

and increasing the desorption temperature from 353 K to 372 K can reduce the CO

equilibrium loading of DGA rich solution by 34.93% to 39.64%. In the continuous desorption experiments

increasing the turbulence intensity can increase the CO

steady-state desorption rate from 6.46% to 79.63% (rotational speed of 200 r/min as the reference)

and increasing the solution desorption temperature from 347 K to 376 K can increase the CO

steady-state desorption rate by about 17-fold. The CO

desorption kinetics model of DGA rich solution in the desorption temperature range of 347 K to 376 K

of 846 to 7789 and CO

loading of 1.35 mol/L to 2.68 mol/L is

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175513&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175467&type=

137.92199707

18.28800011

. Among them

is the CO

desorption rate

is the ideal gas constant

des

is the desorption temperature

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175515&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175514&type=

10.32933331

3.30200005

is the CO

loading in DGA rich solution

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175517&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175530&type=

5.41866684

3.72533321

is the CO

equilibrium concentration in rich DGA solution

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175533&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=102175518&type=

6.18066692

3.30200005

is the concentration of DGA at desorption equilibrium.

关键词

Keywords

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二甘醇胺CO2富液解吸宏观动力学研究

Study on macroscopic kinetics of desorption of CO2-enriched DGA solution

DOI：10.12434/j.issn.2097-2547.20250175

摘要

Abstract

关键词

Keywords

references

二甘醇胺CO₂富液解吸宏观动力学研究

Study on macroscopic kinetics of desorption of CO₂-enriched DGA solution