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Brigham Young University with modeling support from Reaction Engineering International will design, build and test a 20-atm, 100 kW oxy-coal reactor with a dry coal feed system. Project objectives are to develop key scalable technologies and combustion data that will enable the design, development, and testing of future commercial-scale pressurized oxy-coal systems. Key tasks include demonstration and characterization of a continuous dry coal feed system and diffusion flame and flameless combustion burners at high pressure and temperature. In addition, a validated process model will be developed to predict combustion and heat transfer in multi-scale pressurized oxy-coal reactors.
Application of high-temperature pressurized oxy-firing of coal to steam generation may lead to benefits in cycle efficiency, smaller equipment sizes, lower capital costs, avoidance of air ingress, and reduction in excess oxygen requirements. This research is designed specifically to answer key technical questions related to high-pressure dry coal feed systems, diffusion flame and flameless combustion characteristics, reactor heat transfer characteristics, and flue gas recycle impacts. The project will also provide improved process software to help evaluate system heat management, thermal integration, and cycle efficiency. Beyond this, a pressurized oxy-coal reactor will be available for use with future research programs. Successful completion of this project will provide practical designs, data, and predictive tools to further the development of pressurized oxy-combustion and, specifically, high-pressure coal feeding, optimized heat transfer, flameless oxy-combustion, and system integration and optimization assessments.