On the steady flow of a multicomponent, compressible, chemically reacting gas

We consider the system of equations governing the steady flow of a polyatomic isothermal reactive gas mixture. The model covers situations when the pressure depends on species concentration and when the diffusion coefficients of each of the species are density-dependent. It is shown that this problem admits a weak solution provided the adiabatic exponent for the mixture γ is greater than 7/3