Study of unsteady‐state catalytic oxidation of sulfur dioxide by periodic flow reversal

Abstract

A systematic study of catalytic oxidation of sulfur dioxide in a fixed bed reactor operated in flow reversal mode was made. A heterogeneous transient model of the reactor was developed. The global rate equations and the heat transfer parameter correlation were obtained, based on a series of previous experiments. The experiments of unsteady-state oxidation of low concentration SO, were conducted in a bench-scale fixed bed reactor, packed with a domestic commercial catalyst. The model can successfully predict the transient concentration and temperature profiles when a correction factor is introduced to the global rate equations.On a mene une etude systematique sur I'oxydation catalytique du dioxyde de soufre dans un reacteur a lit fixe a ecoulement inverse. Un modele transitoire heterogene a ete mis au point. Les equations globales de vitesse et la correlation des parametres du transfert de chaleur ont ete obtenues sur la base d'experiences anterieures. Les experiences d'oxydation en regime instationnaire d'une faible concentration de SO, ont ete menees dans un reacteur a lit fixe de laboratoire, garni avec un catalyseur commercial domestique. Le modele peut predire avec succbs la concentration et les profils de temperature transitoires lorsqu'un facteur de correction est introduit dans les equations globales de vitesse.

Optimization and Modeling of an Industrial-Scale Sulfuric Acid Plant under Uncertainty

“…In those works, mechanistic models of the reactors were developed. Those models were validated by comparison with experimental laboratory data and thereby established the relationships among the design, operating parameters, and reactor performance. − Furthermore, there have been reports that have made use of optimization tools to show potential improvements in the design and operation of the multistage reactor through a reduction in entropy, redistribution of the catalyst throughout the different stages, and real-time set-point calculation of the first-stage inlet temperature for process gas with a fluctuating concentration of SO 2 …”