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energy source. Coal is the most abundant lowcost fossil fuel, but the high carbon to hydrogen ratio results in production of large quantities of CO2 which, due to concern over global warming, is an unfavourable consequence of the use of this fuel (Irfan, Usman, and Kusakabe, 2011). Coal gasification is one of the most versatile and cleanest ways to convert coal to fuel and energy (Research and Markets, 2006). The ability of the gasification process to eliminate and/or contain air pollutants and greenhouse gases (GHGs) makes this process highly favourable. Hence, it is vital that this process be thoroughly understood to optimize its advantages over conventional coal conversion processes. One particular aspect of the gasification process which is considered in this research is the determination of the kinetic parameters of the reactions occurring when biomass and coal chars are gasified. A comprehensive review of the many factors affecting the kinetics of gasification in CO2 is given by Irfan, Usman, and Kusakabe (2011). Various methods of determining kinetic parameters have been proposed and explored over the years, with varying degrees of success. Of particular interest is collection of methods which are commonly known as model-free/integral isoconversion methods (Starink, 2003). While the model-dependent methods (Rotaru and Goêa, 2009) are based mainly on the LangmuirHinshelwood model, the iso-conversion methods are based on the premise that reaction rate is a product of two functions: one depending solely on temperature, and the other depending solely on the fraction transformed. This is demonstrated by Equation [1].

An algorithm for determining kinetic parameters for the dissociation of complex solid fuels