INVESTIGADORES
OCHOA Nelio Ariel
artículos
Título:
Effects of coating procedure on composite gas separation membrane performance
Autor/es:
C. PAGLIERO; J. MARCHESE; N.A. OCHOA
Revista:
Gas Separation and Purification
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 1993 vol. 7 p. 147 - 149
ISSN:
0950-4214
Resumen:
The influence of different coating procedures on the transport and separation properties ofcomposite gas separation membranes was studied. The composite membrane (CM) comprises a coating material (silicone rubber) in occluding contact with an asymmetricpolysulfone flat membrane (AM). Permeabilities, ideal separation factors and structure ofthe CM were found to depend strongly on the evaporation time, volume and concentrationof the coating solutions. Gas permeation experiments (Hz, N2, C02, CH4) indicated that gaspermeabilities decreased rapidly with an increasing amount of coating. A maximum in theH2/N2, H,/CH, ideal separation factor was reached as the amount of coating was increased.Scanning electron microscopy (SEM) studies revealed the presence of a dense isotropiclayer of coating material above an anisotropic layer comprised of a mixture of polysulfonenodules and silicone material. The results showed that the CM prepared with a concentration of 6% silicone solution and contact time of 1 min has the best gas separationperformance.
