کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
243503 | 501930 | 2012 | 9 صفحه PDF | دانلود رایگان |
This paper examined and assessed various configuration options about emission removal including particles, SOx and NOx in an oxy-coal combustion system for CO2 capture. A performance analysis was conducted in order to understand the impacts of those options concerning process design, process operation and system efficiency. Results show that different flue gas recycle options have clear effects on the emissivity and absorptivity of radiating gases in boiler due to the change of flue gas compositions. The maximum difference amongst various options can be up to 15% and 20% for emissivity and absorptivity respectively. As a result, the heat transfer by radiation can vary about 20%. The recycle options also have impacts on the design of air heater and selective-catalytic-reduction (SCR) preheater. This is due to that the largely varied operating temperatures in different options may result in different required areas of heat exchangers. In addition, the dew point of flue gas and the boiler efficiency are affected by the configurations of flue gas recycle as well.
► Air-coal and oxy-coal combustion systems were simulated in Aspen Plus.
► Various options concerning emission removal in oxy-coal systems were assessed.
► Performance analysis was conducted to understand the impacts of those options.
Journal: Applied Energy - Volume 97, September 2012, Pages 255–263