Abstract
Oxy-fuel combustion is seen as one of the major options for CO 2 capture for both new and existing coal fired power stations. Coal is burned with a mixture of oxygen and recycled flue gas to obtain a rich CO 2 stream ready for sequestration. Computational fluid dynamics (CFD) tests for coal combustion under different O 2/CO 2 (21–35% vol O 2) atmospheres in an entrained flow reactor (EFR) were carried out using three coals of different volatile matter content. The temperature profiles, burning rates, burnout and concentration of major species, such as O 2, CO 2, CO, were predicted and compared with an air reference case. A decrease in gas temperature and burning rate was observed for 21% O 2/79% CO 2 environment in comparison to the air reference case due to the difference in gas properties between N 2 and CO 2. Experimental coal burnouts obtained in the EFR, were used to test the accuracy of the CFD model. The numerical results showed a decrease in coal burnout when N 2 was replaced by CO 2 for the same oxygen concentration (21%), but an improvement in the O 2/CO 2 atmosphere for an oxygen concentration higher than 30%. The numerical results for oxy-coal combustion were in good agreement with the experimental results.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
