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Abstract
In recent years there has been an attempt to minimize our dependence on fossil fuels and exploits the other renewable sources. Biomass is one of the major resources with high convertibility through processes gasification. Among the two major routes: biochemical and thermochemical adopted for converting raw biomass feedstock into productgas,thepresentstudyfocusonadvancesinthermochemicalbasedbubblingfluidizedbedgasifiers(BFG). The paper aims at a compressive review on both solar assisted and conventional BFGs. Detailed insights are presented in terms of parameters like the effect of temperature, particle size, type of biomass, the feed rate of biomass, bed height, bed material on the energy conversion,heating value, gas yield,, tar conversion, gas compositionetc.