An optimization-based procedure for estimating unknown parameters in solution-diffusion models of membrane pervaporation is presented. Permeation of two components through a polymer membrane is described by distinct solution and diffusion models. The solution model is based on a modified form of Flory-Huggins theory that accounts for interactions between the two penetrants. The diffusion model ...

The sol gel process is one of the processes used in manufacture thin films on membranes because it can control pore size resulting silica matrix. In addition, another way to build membrane be done by adding catalysts and precursors used. this study, using a combination tetraethyl ortho silicate (TEOS) triethoxy vinyl silane (TEVS) citric acid as catalyst produce matrix with mesoporous so that s...

Various approaches to solvent recovery have been studied for the manufacturing process of celecoxib, the active ingredient in Celebrex. A design case study has been performed by Rowan University with Pfizer through a green engineering partnership program. The manufacturing operation at Barceloneta, Puerto Rico was evaluated and several green engineering alternatives for the purification and rec...

The study of the diffusion through a homogeneous dense film, covers practically and theoretically a fundamental interest. In pervaporation (membrane separation process) the diffusion is the limiting step in the operation of the transfer and thus directly influences the performance of the membrane. The knowledge of the diffusion coefficient of an aqueous solution in a membrane makes it possible ...

In spite of the growing interest to exploit nanocellulose in membranes for water purification, reverse osmosis, packaging, and other applications, examples nanocellulose-containing pervaporation are rather limited. We here report preparation dense nanocomposite consisting a polystyrene-block-polybutadiene-block-polystyrene (SBS) matrix high-aspect-ratio cellulose nanofibers (CNFs). The were pro...

Integrally-skinned asymmetric Polyetherimide/Poly (vinyl alcohol) (PEI/PVA) hollow fber membranes for pervaporation dehydration were fabricated by non-solvent induced phase inversion. PVA inside the PEI matrix could be crosslinked to provide membrane performance stability during long term operation. The effects of different PEI/PVA blend ratio, external coagulant type and...

Let’s commemorate the 100th anniversary of “pervaporation” by committing ourselves to position it as it deserves. Dear editor, this Submission is a letter to the Editor, and thus, a abstract does not apply.Therefore, this section will be used as a space for my comment or suggestion because it is needed for the next step. When we submit a letter to the editor,...