CIESC Journal

• 资源与环境工程 • 上一篇    下一篇

脱碳MEA/叔胺的性能

杜云贵,刘 涛,辜 敏,卢义玉,鲜学福   

  1. 重庆大学资源及环境科学学院,复杂煤气层瓦斯抽采国家地方联合工程实验室,西南资源开发与环境灾害控制工程教育部重点实验室,重庆 400044
  • 出版日期:2011-12-05 发布日期:2012-03-02

Removing CO2 performances of MEA/tertiary amines aqueous

DU Yungui,LIU Tao,GU Min,LU Yiyu,XIAN Xuefu   

  1. State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam,Key Lab for the Exploitation of Southwestern Resources and the Environmental Disaster Control Engineering of Education Ministry,College of Resource and Environmental Science,Chongqing University,Chongqing 400044,China
  • Online:2011-12-05 Published:2012-03-02

摘要:

应用于工业烟气的CO2吸收剂以一乙醇胺(MEA)为主,改进MEA使其成为更高效的吸收剂是吸收脱CO2的关键之一。本文对相同浓度的MEA3种不同结构的叔胺:即N,N-二乙基乙醇胺(DEAE)、N,N-二甲基乙醇胺(DMAE)和N-甲基二乙醇胺(MDEA)水溶液,以及MEA与这3种叔胺的混胺水溶液(MEA/叔胺)对CO2的吸收和再生性能开展了实验研究,以期达到改进MEA性能的目的。结果表明,叔胺与MEA的吸收行为完全不同;MEA吸收性能好,叔胺再生性能强。MEA/多胺的吸收初期速率下降,但是再生量和再生率都较MEA高。叔胺与MEA在吸收和再生过程中都存在交互作用,交互作用与叔胺种类及吸收时间有关,其中MDEAMEA之间的协同作用最强。

Abstract:

MonoethanolamineMEAaqueous is the most often used absorbent for removing carbon dioxideCO2from fuel gas in industry. Improving the performances of MEA aqueous is one of the key problems for the CO2 removal. In this paperthe absorption and regeneration performances of MEAthree kinds of tertiary amine aqueousincluding N,N-diethylethanolamine ethanolDEAE),N,N- dimethylethanolamineDMAEand N-methyldiethanolamineMDEA),and the blends of MEA with three tertiaryMEA/tertiary aminewere studied. The results showed that the regeneration capacity of three blends were much better than that of MEA. Howeverthe absorption rate of MEA/tertiary amine was lower than that of MEA. The interaction effects between MEA and tertiary amines during absorption and regeneration process were quite different. The interaction effects depended on the tertiary amine and the type absorption/regeneration time. MDEA had the strongest interaction effect with MEA among theses four tertiary amines. MEA/MDEA is a better absorbent for CO2 removing.