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CO2捕集氧化燃烧技术CO2 CAPTURE TECHNOLOGIES OXY COMBUSTION WITH CO2 CAPTURE CO2捕集氧化燃烧技术CO2 CAPTURE TECHNOLOGIES OXY COMBUSTION WITH CO2 CAPTURE

CO2捕集氧化燃烧技术CO2 CAPTURE TECHNOLOGIES OXY COMBUSTION WITH CO2 CAPTURE

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  • 更新时间：2021-09-22
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通常用于燃烧的空气中大约80%的氮气用于将锅炉和其他热回收系统的烟气二氧化碳含量稀释到15%以下。燃烧后捕获过程的目的是将相对稀释的二氧化碳从大量的烟气氮气中分离出来。在氧燃烧过程中，燃烧前空气中的大量氮被除去。由此产生的燃烧产物将含有高达90%的二氧化碳(干基)。如果法规和地球化学允许，未经处理的、脱水的烟气可以直接储存，无需进一步净化。否则，烟气中的杂质(主要是O2、N2和Ar)可以通过将烟气(在中等压力下)降低到CO2冷凝而杂质不冷凝的温度来去除。

The nitrogen that is approximately 80% of the air commonly used for combustion serves to dilute flue gas CO2 content to less than about 15% for boilers and other thermal heat recovery systems. Post-combustion capture processes are designed to separate the relatively dilute CO2 from the bulk flue gas nitrogen. In oxy-combustion processes, the bulk nitrogen is removed from the air before combustion. The resulting combustion products will have CO2 content up to about 90% (dry basis). If regulations and geochemistry permit, the raw, dehydrated flue gas may be stored directly without further purification. Otherwise, the flue gas impurities (predominantly O2, N2, and Ar) may be removed by reducing the flue gas (at moderate pressure) to a temperature at which the CO2 condenses and the impurities do not.

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