Simulation of Municipal Solid Waste Gasification in Fixed Bed Reactor

Abstract

The main objective of this research work is to using the Aspen simulation software version9. For designing complete developed simulation model for gasification municipal solid waste (MSW) in fixed bed reactor, To predict and analyze the municipal solid waste pyrolysis and gasification process in an updraft fixed bed more veritably and appropriately, numerical modeling to minimize Gibbs energy. Rstoic is a model used to simulate a block in reactors with unknown or unimportant reaction kinetic that will describe drying section (moisture evaporated), The Ryield is a model used to describe the pyrolysis section, while the Rgibbs model was used for gasification section individually .The proposed model were used to forecast and analyze target performance parameter including syngas composition, lower heating value and carbon conversion rate under different conditions of gasification temperature , and Air ratios. The results proved that, there was a good agreement between data and simulated data obtained using this model .The Result relived that, the predicted optimum gasification temperature was approximately 750°C, and the best equivalent air ratio was around 0.2 Qand feed rate was found to be 200 kg /hr.