Modeling a pilot-scale fluidized bed coal gasification reactor |
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| Affiliation: | Department of Chemical Engineering, North Carolina State University, Raleigh, NC 27695 U.S.A.;Department of Research and Development, INGELIA Italia, Milan, Italy;Thermal & Environmental Engineering Institute, Tongji University, Shanghai, P.R. China;Safety and Network Strategy, Cadent, Solihull, United Kingdom;Bioenergy Unit, LNEG-National Laboratory for Energy and Geology, Lisbon, Portugal;Department of Chemical Engineering, Pakistan Institute of Engineering and Applied Sciences (PIEAS), 45650 Islamabad, Pakistan;Progressive Energy Ltd., Stonehouse, Gloucestershire, United Kingdom |
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| Abstract: | A steady-state model has been developed to simulate the North Carolina State University pilot-scale fluidized bed coal gasification reactor. The model involves instantaneous devolatilization of coal at the top of the gasifier (freeboard region) and char combustion and gasification in the fluidized bed. A two-phase (emulsion-dilute gas) representation of the fluidized bed incorporates the phenomena of jetting, bubbling, slugging, and mass and heat transfer between phases, and enables the prediction of individual species flow rates and temperature profiles within the bed. The model has been successfully used to simulate the gasification of a devolatilized Western Kentucky bituminous coal and a New Mexico subbituminous coal and to predict effects of various operating parameters on key gasifier performance variables. |
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