燃煤飞灰负载钾基CO2吸收剂再生反应特性的动力学分析

詹乐; 刁永发; 王立威; 孙静

doi:10.12030/j.cjee.201801091

环境工程学报

燃煤飞灰负载钾基CO2吸收剂再生反应特性的动力学分析

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詹乐, 刁永发, 王立威, 孙静. 燃煤飞灰负载钾基CO2吸收剂再生反应特性的动力学分析[J]. 环境工程学报, 2018, 12(8): 2251-2257. doi: 10.12030/j.cjee.201801091

引用本文:

詹乐, 刁永发, 王立威, 孙静. 燃煤飞灰负载钾基CO2吸收剂再生反应特性的动力学分析[J]. 环境工程学报, 2018, 12(8): 2251-2257. doi: 10.12030/j.cjee.201801091

ZHAN Le, DIAO Yongfa, WANG Liwei, SUN Jing. Regeneration kinetics analysis of potassium-based sorbents loaded with coal ash for CO2 capture[J]. Chinese Journal of Environmental Engineering, 2018, 12(8): 2251-2257. doi: 10.12030/j.cjee.201801091

Citation:

ZHAN Le, DIAO Yongfa, WANG Liwei, SUN Jing. Regeneration kinetics analysis of potassium-based sorbents loaded with coal ash for CO2 capture[J]. Chinese Journal of Environmental Engineering, 2018, 12(8): 2251-2257. doi: 10.12030/j.cjee.201801091

燃煤飞灰负载钾基CO2吸收剂再生反应特性的动力学分析

1.
东华大学环境科学与工程学院，上海 201620
2.
甘肃兰菲环保科技有限公司，兰州 730030
基金项目:
甘肃省中小企业创新基金资助项目（1604JCCA165）

Regeneration kinetics analysis of potassium-based sorbents loaded with coal ash for CO2 capture

1.
School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
2.
Gansu Lanfei Environmental Protection Technology Co.Ltd., Lanzhou 730030, China
Fund Project:

摘要: 采用热重分析的方法对吸收剂的再生反应进行研究，说明了燃煤飞灰负载钾基CO2吸收剂的制备方法，探讨了在不同升温速率下燃煤飞灰负载钾基CO2吸收剂和纯KHCO3的再生反应特性。结果表明: 燃煤飞灰负载吸收剂的峰值失重速率为0.13~0.73 mg?min-1，在升温速率为20 ℃?min-1时，反应温度区间最小，为94.34 ℃；采用多种分析方法对吸收剂的受热分解反应进行动力学分析，纯KHCO3的反应活化能为85.7~92.0 kJ·mol-1；燃煤飞灰负载钾基CO2吸收剂的反应活化能为66.2~69.4 kJ·mol-1，随着转化率上升，2种样品的活化能均先减小后增大。燃煤飞灰负载钾基吸收剂再生反应的活化能小于纯KHCO3的活化能，说明将KHCO3负载于燃煤飞灰上有利于再生反应的进行。
- 燃煤飞灰 /
- 纯KHCO3 /
- CO2 /
- 热重分析 /
- 再生 /
- 活化能
Abstract: The regeneration reaction of sorbent was studied by thermogravimetric analysis. The preparation method of potassium-based sorbent loaded with coal ash was briefly described. The regeneration reaction characteristics of the sorbent and pure KHCO3 at different heating rates were discussed. Results showed that peak weight loss rate of the sorbent was from 0.13 to 0.73 mg?min-1, and the minimum reaction temperature range was 94.34 ℃ at the heating rate of 20 ℃?min-1. The thermal decomposition of the sorbent was analyzed. The kinetic analysis results showed that the activation energy of pure KHCO3 was from 85.7 to 92.0 kJ·mol-1, the sorbent was from 66.2 to 69.4 kJ·mol-1, the activation energies of both pure KHCO3 and the sorbent were decreasing first and then increasing with the conversion rate increasing. The activation energy of potassium-based sorbent was less than that of pure KHCO3, indicating that KHCO3 loading on coal ash was beneficial for regeneration reaction.
- coal ash /
- pure KHCO3 /
- CO2 /
- thermogravimetric analysis /
- regeneration /
- activation energy

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燃煤飞灰负载钾基CO2吸收剂再生反应特性的动力学分析

1. 东华大学环境科学与工程学院，上海 201620
2. 甘肃兰菲环保科技有限公司，兰州 730030

基金项目:

甘肃省中小企业创新基金资助项目（1604JCCA165）

关键词:

燃煤飞灰 /
纯KHCO3 /
CO2 /
热重分析 /
再生 /
活化能

摘要: 采用热重分析的方法对吸收剂的再生反应进行研究，说明了燃煤飞灰负载钾基CO2吸收剂的制备方法，探讨了在不同升温速率下燃煤飞灰负载钾基CO2吸收剂和纯KHCO3的再生反应特性。结果表明: 燃煤飞灰负载吸收剂的峰值失重速率为0.13~0.73 mg?min-1，在升温速率为20 ℃?min-1时，反应温度区间最小，为94.34 ℃；采用多种分析方法对吸收剂的受热分解反应进行动力学分析，纯KHCO3的反应活化能为85.7~92.0 kJ·mol-1；燃煤飞灰负载钾基CO2吸收剂的反应活化能为66.2~69.4 kJ·mol-1，随着转化率上升，2种样品的活化能均先减小后增大。燃煤飞灰负载钾基吸收剂再生反应的活化能小于纯KHCO3的活化能，说明将KHCO3负载于燃煤飞灰上有利于再生反应的进行。

English Abstract

Regeneration kinetics analysis of potassium-based sorbents loaded with coal ash for CO2 capture

1. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
2. Gansu Lanfei Environmental Protection Technology Co.Ltd., Lanzhou 730030, China

Fund Project:

Keywords:

Abstract: The regeneration reaction of sorbent was studied by thermogravimetric analysis. The preparation method of potassium-based sorbent loaded with coal ash was briefly described. The regeneration reaction characteristics of the sorbent and pure KHCO3 at different heating rates were discussed. Results showed that peak weight loss rate of the sorbent was from 0.13 to 0.73 mg?min-1, and the minimum reaction temperature range was 94.34 ℃ at the heating rate of 20 ℃?min-1. The thermal decomposition of the sorbent was analyzed. The kinetic analysis results showed that the activation energy of pure KHCO3 was from 85.7 to 92.0 kJ·mol-1, the sorbent was from 66.2 to 69.4 kJ·mol-1, the activation energies of both pure KHCO3 and the sorbent were decreasing first and then increasing with the conversion rate increasing. The activation energy of potassium-based sorbent was less than that of pure KHCO3, indicating that KHCO3 loading on coal ash was beneficial for regeneration reaction.

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燃煤飞灰负载钾基CO2吸收剂再生反应特性的动力学分析

Regeneration kinetics analysis of potassium-based sorbents loaded with coal ash for CO2 capture

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燃煤飞灰负载钾基CO2吸收剂再生反应特性的动力学分析

English Abstract

Regeneration kinetics analysis of potassium-based sorbents loaded with coal ash for CO2 capture

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