Effect of Temperature on gas transport properties in mixed matrix membranes of PVC-Sr2CoUO6

MARÍA G. GARCÍA; RUBÉN PINACCA; JOSÉ PEDREGOSA; NELIO A. OCHOA; JOSÉ MARCHESE

Montpellier, Francia

Congreso; Euromembrane 2009; 2009

Universidad de Montpellier

Membranes remain attractive opportunities for many gas separation industries (natural gas processing, landfill gas recovery, olefin/paraffin separation, air separation, hydrogen recovery, etc.). Because of the economic competitiveness of the existing separation technologies and the present challenges of aggressive environments for membranes, many applications seek more robust membrane materials having higher selectivities and permeabilities [1]. In this sense, mixed matrix membranes offers the potential of combining the polymers´ processability with good gas separation properties of rigid inorganic materials. This work examines the gas transport properties of a mixed matrix membrane as a función of temperature. Commercial polyvinyl chloride (PVC) polymer was used as the polymer matrix and Sr2CoUO6 double perovskite was selected as inorganic filler. The prepared membranes were characterized by X-Ray diffraction and mechanical properties measurements. Permeability, diffusion and sorption coefficients of H2, N2, CH4 and CO2 in PVC membranes were determined at temperatures of 30 and 50 °C and pressure of 3 atm. A thorough analysis of the effect of temperature on the permeation, diffusion and soption coeficients of gases and selective properties of the PVC-Perovskite composite membranes was done [2, 3]. The mixed matrix membranes showed a decrease of αH2/N2 and αCO2/CH4 selectivities respect to pure polymer. The same behavior was observed for the solubility coeficients, while a increase of DH2/DN2 and DCO2/DCH4 factors was showed when an increasing of temperature was done.