Experimental investigation and modeling of gasification of sewage sludge in the circulating fluidized bed

In a second step a model of the CFB gasifier was developed. The fluid dynamics of a CFB were included as well as the complete reaction network of gasification. With the measured axial profiles of gas composition during pyrolysis, and gasification with air and a CO2/N2-mixture kinetic rate expressions for sewage sludge gasification under fluidized-bed conditions were determined which may now be used for reactor scale-up calculations.