Texas lignite pyrolysis

Pyrolysis. All of the Texas lignite pyrolysis data reported in the literature have been based on slow pyrolysis rates (e.g., 3-10 C/min). Goodman et al. (20) performed an early study (1958> on the effect of final carbonization temperature on the yields from several lignites, one of which was a Wilcox lignite. More recently Edgar et al. (21) reported a series of atmospheric pressure studies to evaluate the effects of other carbonization parameters (heating rate, particle size) on carbonization yield and decomposition rate. 

Pyrolysis Behavior. The effect of ion-exchangeable Ca on the pyrolysis of Texas lignite PSOC-623 is illustrated in Figure 2, This is a plot of weight loss (daf basis) versus residence time for pyrolysis in N2 at a furnace temperature of 1173 K. Figure 2 illustrates several important points. First, ion-exchangeable calcium tends to enhance the yield of volatiles at short residence times (<0.1 s). 

R. S. Torres and P. van Meurs, Laboratory studies of the rapid pyrolysis and desulfurization of Texas lignite. Fuel, 59, 458 (1980). 

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