Theoretical calculations and CFD simulations of membrane reactor designs

•Building of the relationship of equilibrium constant-conversion-DaPe for membrane reactors in a general form.•Exemplification of the relationship by the dry reforming of methane and reverse water gas shift by theoretical calculations.•Analysis of the compatibility of reaction kinetics with membrane permeation flux and the effects of reactor geometry by CFD simulations.•Identification and highlight of the contribution of stoichiometric coefficient to conversion enhancement.