Sulfate accumulation trend and its removal performance in CO<sub>2</sub> capture process in coal-fired power plants

REN Mingjie; LI Xiaoduan; WANG Baodeng; CUI Qian; HUO Chao; ZHAO Xinglei

doi:10.19666/j.rlfd.202006169

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Sulfate accumulation trend and its removal performance in CO₂ capture process in coal-fired power plants

Thermal Power Generation Vol. 50, Issue 1, Pages: 62-67(2021)

更新时间：2025-09-28

- Sulfate accumulation trend and its removal performance in CO₂ capture process in coal-fired power plants
- 作者机构：
  
  1. 浙江工业大学化学工程学院
  2. 北京低碳清洁能源研究院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202006169
  CLC： TQ028.7
- Published Online：30 December 2020，
  
  Published：2021
- 稿件说明：
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REN Mingjie, LI Xiaoduan, WANG Baodeng, et al. Sulfate accumulation trend and its removal performance in CO₂ capture process in coal-fired power plants[J]. Thermal Power Generation, 2021, 50(1): 62-67.
DOI：

REN Mingjie, LI Xiaoduan, WANG Baodeng, et al. Sulfate accumulation trend and its removal performance in CO₂ capture process in coal-fired power plants[J]. Thermal Power Generation, 2021, 50(1): 62-67. DOI： 10.19666/j.rlfd.202006169.

摘要

硫酸盐在CO_2捕集溶剂中的富集造成了吸收剂有效成分的下降及设备的腐蚀。本文在实测电厂实际CO_2捕集过程硫酸盐富集规律的基础上

采用电渗析法探讨了吸收剂中硫酸盐的脱除效果

考察了不同电流密度下脱盐率、胺的回收率、电流效率和能耗随时间的变化。结果表明:电渗析法硫酸盐的脱除率达到90%以上

满足了CO_2捕集过程对硫酸盐浓度的控制要求。当电流密度为15 m A/cm2时

胺的回收率达到最大值为97.6%

脱除硫酸盐的能耗为20.9 kW·h/t

综合成本约为220元/t。相比于2 300元/t的溶剂购置成本

采用电渗析法脱除硫酸盐实现吸收剂的有效再生

具有更明显的成本优势。

Abstract

The accumulation of sulfate in CO_2 capture solvent causes a decrease in effective components of the absorbent and corrosion of the equipments. In this paper

on the basis of measuring the sulfate accumulation rules in actual CO_2 capture process of the power plants

the electrodialysis method was used to investigate the sulfate removal performance

and the changes of salt removal rate

amine recovery rate

current efficiency and energy consumption with time at different current densities were also studied. The results show that

by using the electrodialysis method

the sulfate removal rate reached higher than 90%

which satisfied the control requirements for sulfate concentration in the CO_2 capture process. When the current density was 15 mA/cm2

the recovery rate of amine reached a maximum of 97.6%

the energy consumption for removing sulfate was 20.9 kW·h/t

and the total comprehensive cost was about 220 Yuan/t. Compared with the solvent purchasing cost(2 300 Yuan/t)

the effective regeneration of absorbent by removing sulfate using electrodialysis method has more obvious cost advantage.

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Sulfate accumulation trend and its removal performance in CO2 capture process in coal-fired power plants

DOI：10.19666/j.rlfd.202006169

摘要

Abstract

关键词

Keywords

references

Sulfate accumulation trend and its removal performance in CO₂ capture process in coal-fired power plants