A new type of diffusional boundary effect at the edges of singlefile channels
The tracer exchange of guest molecules between one-dimensional channels of zeolites and the surrounding gas phase is studied by molecular dynamics and Monte Carlo simulations under the conditions of single-file diffusion. The shape of the resulting concentration-distance curves reveals a novel diffusional boundary effect. For the same degree of tracer exchange the molecular concentration near the channel boundaries is always closer to the equilibrium concentration in the case of single-file diffusion than in the case of normal diffusion. Using analytical considerations we predict the length of the boundary region of channels showing this deviation and find good coincidence with the corresponding results of simulations.
A. Schüring S. Fritzsche S. Vasenkov
Institut für Theoretische Physik, Vor dem Hospitaltore 1, D-04103, Leipzig, Germany;Institut für Exp Institut für Theoretische Physik, Vor dem Hospitaltore 1, D-04103, Leipzig, Germany Chemical Engineering Department, University of Florida, P.O. Box 116005, Gainesville, FL 32611-6005
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）