The extensive variety of issues include reactions kinetics, simulations and optimizations of different models of reactors including basic explorations of the processes of temperature and mass and momentum transfer that taken places with chemical reaction. Based on this criteria, it is discussed the impacts of the Dufour consequences on natural convective heat and mass transfer for the unsteady two dimensional boundary layer flow through a vertical surface. The resultant governing boundary layer equations are nonlinear and coupled form of partial differential equations which are solved analytically using two-term harmonic and non-harmonic function. The effects of different physical parameters on the velocity, temperature and concentration fields as well as skin friction are discussed in detail

MHD, Porous medium, Vertical surface, Chemical reaction