Speaker: Sayed Alireza Hosseinzadeh Hejazi
Ph.D. Student, Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Canada
Local Organizer: Dr. Saied Nouri Khorasani
Title: Characterization of Natural Zeolite Membranes by H2 and CO2 Permeation
Time: Wednesday, October 12, 2011, 13.30-14.30
Location: Seminar Room, Department of Chemical Engineering, Isfahan University of Technology, Isfahan
Abstract:
Membrane-based processes have the potential to overcome the limitations of the conventional hydrogen separation techniques such as high energy consumption and environmental concerns. Natural zeolite membranes have recently been shown to demonstrate apparent molecular sieving of H2 from H2/CO2 mixtures and can be used as a model for the development of robust molecular sieve membranes with superior separation characteristics.
Characterization of natural clinoptilolite membranes made from dense mineral deposits by single gas H2 and CO2 permeation was studied. Permeability values as a function of temperature and pressure were analyzed based on mass transport fundamentals of gas permeation through zeolite and non-zeolite pathways. Simple comparative parameters were introduced to characterize natural zeolite membranes. H2 and CO2 fluxes through the membranes were fitted with a model based on a combination of zeolitic, Knudsen and viscous transports so that the selective and non-selective flux fractions could be quantified.