Transport phenomena in fixed and fluidized-bed inorganic membrane reactors

This chapter aims at providing a thorough (but nonexhaustive) overview on momentum, mass and heat transport occurring in fixed- and fluidized-bed inorganic membrane reactors. It discusses the mutual relationships among constitutive equations describing the complex transport phenomena determining the macroscopic performance of the considered reactors. As for the momentum transfer, several friction and drag models of literature are recalled along with the operating conditions in which they can be applied. As for the mass transport, a particular attention is paid to zeolite and metal membranes, which are the types of membrane that are used most often. As for the heat transport, several correlations for the heat transfer coefficients of literature are reported and briefly discussed.