Microkinetic Modeling in COMSOL

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Oxidative coupling of methane (OCM) is interesting both industrially and fundamentally due to its coupled heterogeneous-homogeneous mechanism. Therefore, I would like to model it in COMSOL. However, the reactions involve many radical intermediates, such that kinetic mechanisms can quickly contain 50+ gas phase species and 10+ surface species with many hundred reactions. Up to what size can COMSOL handle kinetic mechanisms and are there any options I need to select, like switching to a solver that can handle stiff problems? Any advice is greatly appreciated.


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