Theoretical and experimental studies have been carried out to
analyse the behaviour of gasifiers. The minimisation of Gibbs free
energy has been followed [10] to predict the performance of wood
waste (saw dust). This approach was found to be good to analyse
the gasification process above 1500 K [11]. Another model developed
based on thermodynamic equilibrium approach by
Jarungthammachote and Dutta [12] has considered the equilibrium
constant with correction coefficient for predicting the
composition of producer gas in a downdraft gasifier. It is also suggested
that the moisture content and equivalence ratio have to be
maintained at 10 to 20% and 0.3 to 0.45% respectively for optimal
energy conversion. Chemical equilibrium approach has been used
to analyse the influence of parameters such as moisture content,
equivalence ratio and heating value on the quality of producer gas