Computational Fluid Dynamic (CFD) Simulation ofTharLignite Coal and Sugarcane Bagasse inEntrained Flow Gasifier

For the generation of heat and electricity thermochemical conversion of feedstock is the mostefficient clean, andenvironmentallyfriendly conversion process. In Pakistan, biomass and coalconversion through thermochemical conversionprocesses has got weighty considerationnowadays.As Pakistan is rich in biomass and coal resources. The producer gas producedfromcarbon-containingmaterialscontainsmainly CO,CO2, H2andCH4. A numerical model ofentrained flow gasifier isestablished to simulate coal, biomass blends through entrained flowgasifier.However,locally available coal deposits contain higher amounts of moisture and ash. Dueto high moisture and ash content in coal results in lower reactivity along with the difficulty inhandling of ash produced during gasification. In this researchwork,biomass and coal were co-gasified in entrained flow gasifier. The challenges arising because of the varying thermo-physicalproperties of both feedstocks such as volatile fraction, densityand ash are taken into considerationin order to produce engine quality syngas. The feeding rate inside the concentric tube entrainedflow gasifier wasmaintained at82kg/hr. Dry Pakistani coal and sugarcane bagasse were used as afeedstock for gasification. In this study varying mixing schemes were adopted in order to achievethebestperformance during thecogasificationprocess. The optimum blending ratio was found ata blending ratio of 35:65 on aweightbasis. At theoptimumblendingratio,the CGE and CCE was87% and 99.8%,respectively.