CIESC Journal ›› 2016, Vol. 67 ›› Issue (5): 2064-2069.DOI: 10.11949/j.issn.0438-1157.20151437

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Ammonia escape and its prevention in CO2 absorption process using ammonia solution

MA Shuangchen, CHEN Gongda, WEN Jiaqi, MA Lan, JIAO Kunling   

  1. School of Environment, North China Electric Power University, Baoding 071003, Hebei, China
  • Received:2015-09-11 Revised:2015-10-15 Online:2016-05-05 Published:2016-05-05
  • Supported by:

    supported by the Fundamental Research Funds for the Central Universities (2014ZD39, 2014XS84).

氨法脱碳过程中氨逃逸规律及其抑制

马双忱, 陈公达, 温佳琪, 马岚, 焦坤灵   

  1. 华北电力大学环境学院, 河北 保定 071003
  • 通讯作者: 马双忱
  • 基金资助:

    中央高校基本科研业务费专项资金(2014ZD39,2014XS84)。

Abstract:

With awareness of environmental protection in recent years, control of greenhouse gas emission has become an important issue. A large port of CO2 come from power plants combustion of fossil fuel, and its capture is necessary for fire-coal power plants. Chemical absorption of CO2 by alkaline absorbent is one of widely use methods. Among the removal technologies of air pollutants by chemical absorbents, ammonia method has many advantages. However, ammonia method has a serious ammonia escape problem, leading to a less favorable selection for the application. The effects of CO2 concentration, ammonia concentration, absorption temperature on ammonia escape were experimentally investigated in the paper. Based on consideration of coordination chemistry principle, some metal ions were selected and studied as additives. The results indicated that addition of Ni2+ showed a good performance for the control of ammonia escape, and it was confirmed by the results obtained by UV-visible spectrophotometer. These results could be valuable for solution of ammonia escape.

Key words: carbon capture, ammonia solution, ammonia escape, absorption, chemical processes

摘要:

近年来随着环境保护的不断深入,控制温室气体排放逐渐成为研究重点,而火力发电作为CO2最大的集中排放源,对其实施碳捕集是必要的。氨法脱碳优点众多,但氨逃逸问题始终没有得到很好解决。通过实验研究明晰了CO2浓度、氨水吸收剂浓度、吸收反应温度对氨逃逸的影响规律,基于金属离子的络合效果探讨了几种金属离子对氨逃逸的抑制效果,发现Ni2+对氨逃逸有较好的抑制效果,并通过紫外分光光谱推测了其抑氨机理。本研究成果可对氨逃逸问题的解决提供一定的参考。

关键词: 碳捕集, 氨水, 氨逃逸, 吸收, 化学过程

CLC Number: