Mass transfer in polymeric systems with a dynamic interface

Citation
Ga. Aminova et al., Mass transfer in polymeric systems with a dynamic interface, THEOR F CH, 33(6), 1999, pp. 558-563
Citations number
8
Categorie Soggetti
Chemical Engineering
Journal title
THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING
ISSN journal
00405795 → ACNP
Volume
33
Issue
6
Year of publication
1999
Pages
558 - 563
Database
ISI
SICI code
0040-5795(199911/12)33:6<558:MTIPSW>2.0.ZU;2-J
Abstract
Mass transfer during solvent extraction from dispersed particles of a polym er solution in an aqueous medium with simultaneous solvent sublimation from the continuum phase was simulated, A mathematical model includes the gener al description of macro- and microkinetics of a complex heat-and-mass-trans fer process in a dynamic-interface heterogeneous system. A formula for the shrinkage rate of polymer solution particles is obtained. A numerical techn ique for process characterization takes into account the transition from a varying region to a fixed one. It uses a special difference scheme to solve the convective diffusion equation in which the convective and diffusion te rms vanish with time. This model of mass transfer in dynamic-interface hete rogeneous systems made it possible to simulate process stages in the produc tion of ball-grain gun powder.