Micropore Filling Phase Permeation of a Condensable Vapor in Silica Membranes: A Molecular Dynamics Study

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Hiroki Nagasawa¹  Tomohisa Yoshioka¹  Toshinori Tsuru¹  Masakoto Kanezashi¹ 

[1] Department of Chemical Engineering, Hiroshima University

关键词: Micropore Filling;    Inorganic Membrane;    Molecular Dynamics;    Gas Permeation;    Adsorption;   

DOI  :  10.1252/jcej.13we089

来源: Maruzen Company Ltd

【 摘 要 】

References(27)Cited-By(3)Molecular dynamics simulation was used to investigate the permeation properties of a virtual condensable vapor through micropores. A permeation model was proposed to simulate the movement of condensable vapor through a micropore. The model is called “micropore filling phase permeation (MFP),” and the effect of feed gas pressure, pore size and pore size distributions on the vapor permeation properties was examined through model calculations. The observed permeance of ethane-like LJ particles at 260 K, a temperature below the critical temperature of real ethane, decreased stepwise at a specific pressure as the mean pressure was increased for micropores sized 0.8 and 1.1 nm in diameter. Analysis of the adsorption isotherm in the pores and vapor permeation simulations revealed the formation of a high-density liquid-like phase in micropores as the MFP caused a decrease in the mobility of permeating molecules. The model calculations based on the MFP showed qualitative agreement with the simulation results.

【 授权许可】

Unknown