Application of the Law of Additive Reaction Times to Fluid-Solid Reactions in Porous Pellets with Changing Effective Diffusivity

作者：Sohn Hong Yong^*; Perez Fontes Silvia E

来源：Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science, 2010, 41(6): 1261-1267.

DOI：10.1007/s11663-010-9414-0

An approximate closed-form solution, which is based on the Law of Additive Reaction Times for a fluid-solid reaction formulated previously, is presented for the reaction of a fluid with a porous solid in which there is a change of porosity and, thus, effective diffusivity during the reaction. The proposed solution was compared with exact solutions reported in the literature in terms of the effects of various parameters on the fractional conversion. The closed-form expression was found to give satisfactory results and, thus, makes it unnecessary to use a numerical solution. This study represents another of many examples in which Sohn's Law has provided useful closed-form solutions.

• 出版日期2010-12