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Biomass is one of the RES to produce power with zero CO2 emission, biomass gasification process considered as a sustainable technology for energy conversion. This paper deals with rice husk air gasification simulation using non-stoichiometric equilibrium model based on Gibbs free energy minimisation. The FACTSAGE 6.3 software used to calculate gas composition at temperature range 600-1000°C and equivalence ratio range 0.15-0.55. Maximum gas mixture exergy of 9551.7 kJ per kg of rice husk is obtained at ϕ = 0.25 and 725°C. Chemical exergy contributes 89.90-94.85% of total gas mixture exergy, cold gas efficiency and exergetic efficiency varies in the range of 25.19-70.71% and 23.11-62.24%, respectively, in operating condition. Rice husk gasification process analysed by evaluating, sustainability index and environmental destruction factor.

Energy, exergy and sustainability analysis of rice husk air gasification process