Technologies for increasing CO2 concentration in exhaust gas from natural gas-fired power production with post-combustion, amine-based CO2 capture
Technologies for increasing CO2 concentration in exhaust gas from natural gas-fired power production with post-combustion, amine-based CO2 capture
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DOI：
10.1016/j.energy.2010.11.037
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发表时间：
2011-02
期刊：
影响因子：
9
通讯作者：
Hailong Li;M. Ditaranto;D. Berstad
中科院分区：
文献类型：
--
作者：
Hailong Li;M. Ditaranto;D. Berstad
提高废气中CO2浓度被认为是一种潜在的有效方法，以减少燃烧后捕集系统中CO2化学吸收引起的高电效率损失。研究了废气再循环（EGR）、增湿（EvGT）、补燃（SFC）和外燃（EFC）4种不同的方法对提高燃气涡轮机动力装置废气中CO2浓度的效果。努力集中在对循环效率、燃烧、燃气涡轮机部件和成本的影响上。结果表明，采用EGR的联合循环具有最大的CO2摩尔分数变化范围（从3.8mol%到至少10mol%）和最高的电效率。EvGT循环具有相对较低的额外成本影响，因为它不需要任何底部循环。外烧法对燃烧和燃烧产物的影响最小。
Enhanced CO2concentration in exhaust gas is regarded as a potentially effective method to reduce the high electrical efficiency penalty caused by CO2chemical absorption in post-combustion capture systems. The present work evaluates the effect of increasing CO2concentration in the exhaust gas of gas turbine based power plant by four different methods: exhaust gas recirculation (EGR), humidification (EvGT), supplementary firing (SFC) and external firing (EFC). Efforts have been focused on the impacts on cycle efficiency, combustion, gas turbine components, and cost. The results show that the combined cycle with EGR has the capability to change the molar fraction of CO2with the largest range, from 3.8 mol% to at least 10 mol%, and with the highest electrical efficiency. The EvGT cycle has relatively low additional cost impact as it does not require any bottoming cycle. The externally fired method was found to have the minimum impacts on both combustion and turbomachinery.