INVESTIGATION ON SYNGAS PRODUCTION FROM BIOMASS AND PETROLEUM COKE THROUGH THE NOVEL CHEMICAL LOOPING GASIFICATION TECHNOLOGY

Abstract

Chemical looping gasification (CLG) is an innovative and promising technology that can effectively convert the solid fuels into valuable syngas which is mainly composed of H2 and CO. Based on the computational fluid dynamics, a reactive multiphase model coupled with the chemical kinetics is developed to simulate the CLG process utilizing biomass and petroleum coke as fuels for syngas production. The reaction mechanisms including the pyrolysis of fuel, gasification of char, water-gas shift, oxygen carrier reduction, steam reforming and sulfur conversion are taken into account. The concentrations of various gas products with time predicted by the simulations are in good agreement with the experimental data. The multiphase flow phenomena within the fluidized bed reactor are captured in a reasonable manner. The developed model is further applied to comprehensively evaluate the effects of operation temperature, fuel feeding rate and steam flow rate on the CLG performance for optimization.