Steady State Simulation of Coal Gasification in a Fluidized Bed Gasifier
Authors: Odeh AO, Okafor NA
Gasification provides an important route for the conversion of coal to synthesis gas for the production of fuels, chemicals or for use in thermal power generation. Among the coal gasification processes, the fluidized-bed process with inherent advantage of high heat transfer and easy handling of solids is a natural choice. This work presents the steady state simulation of coal gasification in a fluidized bed gasifier using Aspen Plus 3.2. Data on the proximate and ultimate analysis for the coal and an assumption that major gasification reactions go to equilibrium was utilised to carry out the simulation. Sensitivity analysis was carried out to investigate the effect of various parameters such as temperature, pressure, steam to coal ratio and oxygen to coal ratio, on the syngas composition and the fraction of carbon left in the char. Results obtained were found to agree fairly well with experimental values, with slight over-prediction in the composition of hydrogen and slight under-prediction in the case of methane composition.
Affiliations: Department of Chemical Engineering, Faculty of Engineering, University of Benin, PMB 1154, Benin City, Nigeria.
Keywords: Coal, Gasification, Aspen Plus, Simulation, Fluidized Bed
Published date: 2018/12/30