Pressurized fluidized bed combustion and gasification of coal using flue gas recirculation and oxygen injection

• Published in: Energy conversion and management Vol. 38; pp. S117 - S122
• Main Authors: Andries, J, Becht, J.G.M, Hoppesteyn, P.D.J
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 1997; Elsevier
• Subjects: Air pollution caused by fuel industries; Applied sciences; coal; combustion; Combustion of solid fuels; Combustion. Flame; Energy; Energy. Thermal use of fuels; Exact sciences and technology; gasification; gasturbine; low calorific value gas; Pollution reduction; pressurized fluidized bed; Stack gas and industrial effluent processing; Theoretical studies. Data and constants. Metering; coal; combustion; low calorific value gas; pressurized fluidized bed; gasification; gasturbine; Pressurized fluid bed combustion; Carbon dioxide; Coal; Air pollution; Combustion; Gasification; Experimental study; Performance; Pollutant emission; Flue gas purification
• ISSN: 0196-8904; 1879-2227
• DOI: 10.1016/S0196-8904(96)00256-7

A combined cycle incorporating pressurized fluidized bed combustion of coal with pure oxygen and recycled flue gas followed by pressurized combustion of the fuel gas using pure oxygen, is a process which produces electricity and heat with a high efficiency and a flue gas with a high CO 2 concentration. CO 2 recovery from this process can be done more easily than from conventional coal conversion processes. In this way a high efficiency coal conversion process can be realized with low CO 2 emissions. The specific aim of the project is to assess the technical feasibility of this process. For this purpose a 1.6 MW th pressurized fluidized bed combustion test rig has been modified to study experimentally the gasification process and the pressurized combustion of the resulting low calorific value fuel gas. The objectives of the project, the modified test rig and the experimental results obtained from combustion experiments with coal, recirculated flue gas and pure oxygen are described. The conversion efficiencies and the emission of harmfull components measured during these experiments are analyzed and compared with values obtained during combustion and gasification using air.