The performance of continuous cyclic ion-exchange reactors—II: Reactions with intraparticle diffusion controlled kinetics
✍ Scribed by R. Gomez-Vaillard; L.S. Kershenbaum
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 801 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
Abatraf--This work extends the previous experimental and theoretical study of the Cloete-Streat stage-wise solid-liquid contactor to the case of high liquid concentrations where the rate of ion exchange is limited by the kinetics of intraparticle diffusion. In all cases, the reaction studied was neutralization fo NaOH with a cationic exchange resin. Experiments were carried out in a three-stage system and simulations using literature values of the kinetic parameters and a population-based model of this system gave excellent agreement (within 27%) with the experimental results. It was found that small improvements beyond steady-state performance could be obtained by varying the fraction of solids oeriodicallv transferred. keeDinn flow rates and mean residence times of both Dhases constant. However, if solid's conversik is hi (kO%), as was unavoidable in these experiments, the-scope for such improvement in performance decreases and any inefficiency due to the method of addition of solids can actually lead IO a small decrease in the overall performance when compared to Ihat of steady-state.