Preliminary study on CO2 processing in CO2 capture from oxy-fuel combustion
2007 (English)In: Proceedings of the ASME Turbo Expo, vol. 3: Montreal, Que.: 14 May 2007 through 17 May 2007, 2007, 353-361 p.Conference paper (Refereed)
Oxy-fuel combustion is one of promising technologies for CO2 capture, which uses simple flue gas processing normally including compression, dehydration and purification/liquefaction (non-condensable gas separation). However relatively high levels of impurities in the flu gas present more challenges for the gas processing procedure. This paper studied the sensitivity of operating parameters to inlet composition, the effects of impurities on energy consumption, and the relationship between energy consumption and operating parameters. Results show that comparatively the total compression work is more sensitive to the composition of SO2 if the total mass flow is constant; while the operating temperature of purification is more sensitive to N-2. To pursue the minimum energy consumption, from the viewpoint of impurity, the content Of O-2, N-2, Ar and H2O should be lowered as much as possible, which means the amount of air leakage into the system and excess oxygen should be controlled at a low level in the combustion; as to SO2, if it is possible to co-deposit with CO2, its existence may be helpful to decrease compression work. From the viewpoint of operating parameters, low intermediate pressure, high intercooling temperature and high outlet pressure are favorable to achieve high energy utilization, if heat recovery is considered.
Place, publisher, year, edition, pages
2007. 353-361 p.
oxy-fuel combustion, CO2 processing, impurity, operating parameters, energy consumption, sensitivity analysis
IdentifiersURN: urn:nbn:se:kth:diva-24167ISI: 000252771900036ScopusID: 2-s2.0-34548779734ISBN: 978-0-7918-4792-3OAI: oai:DiVA.org:kth-24167DiVA: diva2:344491
QC 201008192010-08-192010-08-192010-08-19Bibliographically approved