Investigations on temperature and equivalence ratio optimization in a downdraft gasifier

Abstract

Increase in demand for power scarcity of fossil fuel and pollution control norms mandates a clean and sustainable energy for future Biomass gasification is the solution for the global problem Biomass is an organic material derived from plants and animals, made up of cellulose hemicellulose and lignin The main sources of biomass are the agricultural waste forest waste municipal waste biological waste and energy plantation During gasification biomass is converted into gas char tar ash and slag The resultant gases are used in direct heating application production of industrial feedstock transportation and power generation Non stoichiometric equilibrium model with Gibbs free energy minimization is used for finding the end composition of rice husk air gasification rice husk steam gasification sawdust air gasification and sawdust oxygen gasification by FactSage 6 3 software Rice husk air gasification simulation carried out for temperature range 600°C 800°C and equivalence ratio of 0 25 0 45 Rice husk steam gasification carried out for 690°C 750°C and steam to biomass ratio of 1 132 Sawdust air gasification and sawdust oxygen gasification carried out for the temperature and equivalence ratio range of 200°C 1200°C and 0 3 0 6 respectively The effect of temperature and equivalence ratio studied for rice husk air gasification sawdust air gasification and sawdust oxygen gasification The effect of temperature and steam to biomass ratio studied for rice husk steam gasification. newline