(60dh) Technology Development for Coal-Direct Chemical Looping Power Generation: Experimental Demonstration and Process Assessment
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, August 19, 2020 - 3:00pm to 4:00pm
Experiments have been conducted in support of process scale-up. The Ohio State University (OSU) has conducted experiments on a 25 kWt sub-pilot CDCL facility. The results showed the sub-pilot facility is capable of producing CO2 at 99% purity with the coal conversion higher than 97%. In collaboration with The Babcock & Wilcox Company (B&W), a 250 kWt pilot CDCL facility was designed, constructed, and successfully demonstrated with over 2-week continuous operation and similar performance as compared to sub-pilot facility. The feasibility of CDCL technology was further validated and knowledge associated with process scale-up was obtained through these experiments.
In addition to sub-pilot and pilot testing, a comprehensive process analysis was performed to evaluate and optimize the process efficiency as well as minimize the overall cost of electricity production using the CDCL process. A process model of CDCL power plant was developed in Aspen Plus based on the results of sub-pilot and pilot plant experiments and references. The results indicate that the CDCL technology shows a higher exergy efficiency and is more economically favorable as compared to conventional coal-based power generation technology with CO2 capture.