Experiment and analysis of ammonia escape from decarburization absorbent inhibited by NHD
Experiment and analysis of ammonia escape from decarburization absorbent inhibited by NHD
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发表时间：
2011
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通讯作者：
Zhao Yi
中科院分区：
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作者：
Zhao Yi
CO2是最重要的温室气体，减排已引起广泛关注。燃煤电厂是我国温室气体的主要排放源，发展CO2捕集技术具有重要意义。采用氨水溶液吸收烟气中的CO2有望实现低成本、高效率。然而，该工艺面临氨逃逸问题，本文针对氨法脱碳过程中氨逃逸问题，通过对NHD的一系列实验，聚乙二醇二甲醚对氨鼓泡吸收的抑制作用，研究了NHD和氨浓度对氨逃逸的影响，结果表明，NHD在抑制氨逃逸的同时，也增强了CO2的去除，当NHD浓度为5%时，氨逃逸量减少了24.86%，CO2去除率提高了10%左右在脱碳液中加入NHD，研究结果可为氨法捕集CO2的进一步研究提供参考。
CO2 is the most important greenhouse gas,and reducing its emission has caught wide attention.It is very important to develop CO2 capture technology for coal-fired power plants,which account for major greenhouse gas emission in China.Using ammonia solution to absorb CO2 from flue gas is expected to realize low cost and high efficiency.However,this technology faces a problem of escape of ammonia.This paper focuses on the problem of ammonia escape in ammonia decarburization process,through a series of experiments on NHD(polyethylene glycol dimethy ether)inhibiting effects in bubbling absorption of ammonia.The impacts of NHD and ammonia concentrations on ammonia escape were studied,and NHD inhibition mechanism of ammonia escape was analyzed.The results showed that NHD showed inhibition for ammonia escape and enhanced removal of CO2 at the same time.The amount of escaping ammonia was reduced by 24.86% and the removal efficiency for CO2 increased by about 10% when 5% NHD was added to decarburization solution.The results could provide reference for further research of ammonia method to capture CO2.