Development of pore network method in simulation of non-catalytic gas-solid reactions - Study of sulfur dioxide chemisorption on copper oxide sorbents

The effects of several parameters on the network characteristic were investigated. It was shown that the product layer diffusivity has not much effect on the results, while initial connectivity, initial solid reactant concentration, pore thickness, pore diameter and expanding factor have significant impresses on the conversion-time diagrams. NCGSR accompanied by PNS was then used to reproduce the experimental data of SO2-CuO/Alumina reaction in thermal gravimetric analyzer (TGA) extracted form literature without using any adjustable parameter such as tortuosity factor. To guess the pore thickness for the network, a simple model was submitted based on structure of the actual sorbents. It was revealed that the model can provide a suitable estimate for conversion-time diagram of the sorbents if the active sites were dispersed mono layer over the catalyst surface. However, some inherent incapabilities of the model result in the deviation of the model from experimental.