不同胺基CO2固体吸收剂的热稳定性能

doi:10.3969/j.issn.0438-1157.2012.10.042

化工学报 ›› 2012, Vol. 63 ›› Issue (10): 3304-3309.DOI: 10.3969/j.issn.0438-1157.2012.10.042

不同胺基CO₂固体吸收剂的热稳定性能

赵文瑛, 王丽香, 李振山, 蔡宁生

清华大学热能工程系, 热科学与动力工程教育部重点实验室, 二氧化碳资源利用与减排技术北京市重点实验室, 北京100084

收稿日期:2012-02-21 修回日期:2012-05-30 出版日期:2012-10-05 发布日期:2012-10-05
通讯作者: 李振山
作者简介:李振山,赵文瑛(1987- ),男,博士研究生。
基金资助:
国家高技术研究发展计划项目(2011AA050601)。

Thermal stability of various amine CO₂ absorbents

ZHAO Wenying, WANG Lixiang, LI Zhenshan, CAI Ningsheng

Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Municipal Key Laboratory for CO₂ Utilization & Reduction, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

Received:2012-02-21 Revised:2012-05-30 Online:2012-10-05 Published:2012-10-05
Supported by:
supported by the High-tech Research and Development Program of China(2011AA050601).

摘要/Abstract

摘要： 为应对温室效应对全球气候的影响,CO₂的捕集和封存(carbon capture and storage,CCS)技术成为近年来的研究热点.我国能源消费结构以煤为主,煤燃烧排放的CO₂约占我国CO₂排放总量的82%^[1],主要用于发电.因此研究燃煤电站烟气中脱除CO₂的技术具有重要意义.

关键词: 固态胺, 四乙烯五胺, 聚乙烯亚胺, 挥发, 稳定性

Abstract: Four types of solid amines were prepared by impregnating disordered porous silica gel Q-10 in tetraethylenepentamine(TEPA)and polyethylenimine(PEI)with various molecular weight of 600,1200 and 1800.Their absorption capacity and thermal stability were investigated.The experiment results indicate that absorption capacity is higher and thermal stability less for TEPA-SiO₂ than for PEI-SiO₂.The initial temperature of volatilization for amine on TEPA-SiO₂ is 115℃,while the thermal stability of PEI-SiO₂ absorbents will be improved with increasing PEI molecular weight.After cycle 10 times and regeneration at N₂ gas,the absorption capacity of three PEI-based adsorbents at 105℃ keeps stable and the loss of their mass is only 0.6%,0.2%,0.1% for various molecular weight PEI,indicating that PEI-SiO₂ absorbents has excellent thermal stability.Under 80% CO₂ the regeneration temperature will be raised above 140℃,the high-molecular weight PEI-based absorbents still have good thermal stability and the volatilization of amine has little influence on its performance in several cycles.

Key words: solid amine, TEPA, PEI, volatilization, stability

中图分类号:

TQ127

赵文瑛, 王丽香, 李振山, 蔡宁生. 不同胺基CO₂固体吸收剂的热稳定性能[J]. 化工学报, 2012, 63(10): 3304-3309.

ZHAO Wenying, WANG Lixiang, LI Zhenshan, CAI Ningsheng. Thermal stability of various amine CO₂ absorbents[J]. CIESC Journal, 2012, 63(10): 3304-3309.

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不同胺基CO₂固体吸收剂的热稳定性能

Thermal stability of various amine CO₂ absorbents

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