Preparation And Characterization Of Carbon Molecular Sieve Membrane From Polyfurfuryl Alcohol
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Date
2011-07
Authors
Wan Harun, Wan Mohd Hafiz Faisal
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The application of inorganic membrane would minimize the problems
suffered by conventional gas separation technologies such as adsorption, chemical
process and polymeric membrane. In this work carbon molecular sieve (CMS)
membranes were successfully prepared from polyfurfuryl alcohol (PFA). The CMS
membrane substrate was prepared first by coating the dope solution of titania sol onto
the titania disk and heated from 300 to 600˚C of sintering temperature. On the other
hand, the carbon film was formed by dipping the substrate onto PFA solution
followed by carbonization between 400 to 600˚C for 1 to 4 hours of thermal soak
times. The average pore size and d-spacing were reduced to 4.72Å and 3.67Å,
respectively as the carbonization temperature increase up to 600oC. On the other
hand, the elemental analysis verified that the carbonization at 600˚C induce 41% and
87% percentage reduction of [H]/[C] and [O]/[C] ratios, respectively. The analysis
of variance reveal the carbonization temperature exhibits significant effect on gas
permeances and ideal selectivity compared to thermal soak time. The optimum CMS
membrane preparation conditions were obtained at 600°C and 4 hours of
carbonization temperature and thermal soak time, respectively. The permeation
properties of the optimum CMS membrane were 4.95×10-8 mol/m2.s.Pa, 7.74×10-8
mol/m2.s.Pa, 1.82 and 5.31 for O2 permeance, CO2 permeance, O2/N2 ideal selectivity
and CO2/CH4 ideal selectivity respectively. The optimum CMS membrane possesses
the highest gas permeance and ideal selectivity.
Description
Keywords
Characterization of carbon molecular , sieve membrane from polyfurfuryl alcohol