聚乙二醇二甲醚抑制脱碳吸收剂中氨逃逸的实验及原理分析

CO₂作为主要的温室气体，其减排问题引起全球范围的广泛关注，开展适合我国国情的燃煤电厂CO₂减排技术研究至关重要。氨法脱除电厂烟气中CO₂具有低成本、高脱除效率等特点，但该技术面临的一个很大问题是氨的逃逸。针对氨法脱碳过程中氨逃逸问题展开实验研究，采用鼓泡吸收反应器研究了聚乙二醇二甲醚（NHD）对氨逃逸的抑制效果以及氨水和NHD浓度对氨逃逸的影响，并分析了NHD抑制氨逃逸的机理。结果表明，NHD对氨逃逸具有一定的抑制作用，同时在一定程度上提高了脱碳效率。添加5%NHD后，氨逃逸量降低24.86%，CO₂的脱除效率增加10%左右。研究结果对进一步开展氨法捕集CO₂研究有较大的参考价值。

Experiment and analysis of ammonia escape from decarburization absorbent inhibited by NHD

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.