Solids analysis, limestone

The above calculation is quite tedious and gets complicated by the fact that the properties which ultimately control the magnitude of these fourteen unknown quantities further depend on the physical and chemical parameters of the system such as reaction rate constants, initial size distribution of the feed, bed temperature, elutriation constants, heat and mass transfer coefficients, particle growth factors for char and limestone particles, flow rates of solid and gaseous reactants. In a complete analysis of a fluidized bed combustor with sulfur absorption by limestone, the influence of all the above parameters must be evaluated to enable us to optimize the system. In the present report we have limited the scope of our calculations by considering only the initial size of the limestone particles and the reaction rate constant for the sulfation reaction. 

Thermogravimetry (TG) is the most widely used technique of thermal analysis, in which the mass of a substance is measured as a function of the temperature while it is subjected to a controlled temperature program. The record on the thermogravimetric, or TG, curve is the mass plotted against the temperature (T) or time (f) if the variation of temperature with time can be indicated as well on the same graph. In solid-state decomposition reactions, the reactant material degrades, often to be replaced by the solid product. An example of this is the decomposition of limestone to quicklime. 

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