Experimental Research on Fractal Characteristic of Ca-Based Desulfurization Sorbents

Based on the fractal theory, two different experimental methods were employed to determine and analyze the fractal dimension of the Ca-based sorbents. Fractal dimension of the pore boundary of the ca-based sorbents calcinated at various temperatures were measured firstly by using the scan electron microscope (SEM) and the improved box-counting program, the relationship between the pore boundary fractal dimension and temperatures was derived. Moreover, the factors that affect the fractal dimension, such as additive amount and temperature, were studied by using the mercury porosimetric method. It showed that more additives or higher temperature all decreased fractal dimension of the sorbents and both the two methods presented in this paper could effectively determine and analyze the dimension of the sorbents.