Mass transfer by molecular diffusion

Abstract

The movement of any species from a high concentration to a low concentration zone is called the mass transfer. In any system, the mass transfer occurs through molecular and/or bulk/convective motions depending on system dynamics. The molecular mass transfer occurs due to the random motion of the species molecules generated due to the collision; this is also called molecular diffusion. The use of CO2 for enhanced oil recovery (EOR) is progressively increasing. However, for successful CO2 EOR operation, it is critical to understand the transfer of CO2 through bulk oil (fluid) and rock (both porous and non-porous). This chapter covers all the aspects of CO2 transport from the surface to the oil reservoir for the EOR process. © 2022 Elsevier Inc. All rights reserved.