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The mass-based Maxwell-Stefan approach to one-phase multicomponent reactivemixtures is mathematically analyzed. It is shown that the resultingquasilinear, strongly coupled reaction-diffusion system is locally well-posedin an $L_p$-setting and generates a local semiflow on its natural state space.Solutions regularize instantly and become strictly positive if their initialcomponents are all nonnegative and nontrivial. For a class of reversiblemass-action kinetics, the positive equilibria are identified: these areprecisely the constant chemical equilibria of the system, which may form amanifold. Here the total free energy of the system is employed which serves asa Lyapunov function for the system. By the generalized principle of linearizedstability, positive equilibria are proved to be normally stable.

Reaction-diffusion systems of Maxwell-Stefan type with reversible mass-action kinetics