Modelling, simulation and optimization of a solid residues downdraft gasifier: Application to the co-gasification of municipal solid waste and sugarcane bagasse

Caroline Smith Lewin, Ana Rosa Fonseca de Aguiar Martins and Florian Pradelle

Energy, 2020, vol. 210, issue C

Abstract: This work modelled a downdraft gasifier with air in the co-gasification of municipal solid waste (MSW) and sugarcane bagasse using a kinetic, one-dimensional and steady state approach. A central composite design was carried out to assess the impact of the co-gasification ratio (CGR), defined as the MSW mass fraction in the feeding biomass, the biomass moisture content and the equivalence ratio. As a result, polynomial models were obtained for syngas composition, lower heating value (LHV), energy efficiency and sum of CO and H2 molar fractions on wet basis. The models were considered robust since the coefficient of determination R2 ranged from 0.96082 to 0.99345. The impact of each chosen factor was investigated to maximize the energy efficiency and the sum of CO and H2 molar fractions. The optimal case, with CGR 50%, a biomass moisture of 5.0% and an equivalence ratio of 0.18, resulted in a syngas molar fraction of 3.63, 30.51, 7.53, 19.76 and 0.77% for H2O, CO, CO2, H2 and CH4, respectively, corresponding to a LHV of 6.74 MJ/Nm3 and an energy efficiency of 39.93%. By the end, the process showed great potential to produce a syngas rich in CO and H2.

Keywords: Gasification; Municipal solid waste; Sugarcane bagasse; Kinetic modelling; Simulation (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:210:y:2020:i:c:s0360544220316066

DOI: 10.1016/j.energy.2020.118498

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