Abstract
The influence of a resistance to reactant adsorption on the multiplicity and stability of the steady state of a catalyst particle, promoting an exothermic reaction, is considered. For activated adsorption new regions of multiplicity are uncovered in the parameter space. It is shown that multiple solutions can arise for a surface reaction having zero activation energy. No such behaviour is observed for non-activated adsorption. The effect of non-activated adsorption is largely to diminish the regions of multiplicity. The influence of reactant adsorption resistance on the stability of the steady state is most complex and no general conclusions are drawn. A few specific cases are considered. The presence of an additional heat generation term due to adsorption has a great stabilising influence and, in addition, tends to dramatically reduce “hot-spot” temperatures which may arise during transient behaviour.
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