The modified Fluid and Solid reaction model and experimental verification
Abstract
The shrinking core model(SCM) is widely used to model fluidsolid reaction in many studies. Based on the shrinking core model incorporated particle size distribution(PSD) and the characteristic of products, a modified model has been set to simulate the reaction process of fluid and solid. Limestone dissolution is a typical liquidsolid reaction, and experimental work has been done with five kinds of limestone from different producing area in china. The dissolution process of limestone can be predicted. In the model, two parameters the comprehensive reaction coefficient k and total reaction rate constant k_{m} are defined. By chosen proper value, the model can well describe the limestone dissolution process in acid. Furthermore, k_{m} is dependent of mass transfer in fluid and chemical reaction but independent of properties of solid and fluid. k and k_{m} can be deduced from experimental results by numerical method, and k_{m} is similar for different samples with the same reaction condition. The model established a relationship between micro parameter and macro experimental data.
 Publication:

The 6th International Symposium on Multiphase Flow, Heat Mass Transfer and Energy Conversion
 Pub Date:
 March 2010
 DOI:
 10.1063/1.3366369
 Bibcode:
 2010AIPC.1207..219L
 Keywords:

 fluid dynamics;
 mathematical analysis;
 reaction rate constants;
 47.85.Np;
 47.10.A;
 82.40.Ck;
 Fluidics;
 Mathematical formulations;
 Pattern formation in reactions with diffusion flow and heat transfer