Abstract:
Biomasses from rice husk, rice straw, almond shell, parawood, bagasse, and corncob have been modeled as a mixture of phenylpropane (C[subscript a]H[subscript a]O), glucose(C[subscript 6]H[subscript 12]O[subscript 6]), pentose (C[subscript 5]H[subscript 10]O[subscript 5] and high molecule alcohol (C[subscript 28]H[subscript 58]O) correspondingly. Downdraft gasifier has been represented by a series of adiabatic equilibrium reactors of pyrolysis, oxidation, Boudouard reaction, hydro-gasification, steam-gasification, water-gas shift reaction, and methanation. While a fluidized gasifier has been represented by an isothermal equilibrium reactor, in which all reactions occur simultaneously. The temperature of a gasifier can be reduced by increase in the moisture content, or can be raised by preheating the oxidizing gas. Consequently, the gas composition of synthesis gas producted has been shifted. In addition to gaseous products, the downdraft gasifier has produced heat 1,900 kJ/kg biomass at 940 K, while the fluidized gasifier has been produced heat 2,600 kJ/kg biomass at 1,100 K.