Separation of gas and organic/water mixtures by MFI type zeolite membranes synthesized in a flow system

2010-01-01
Soydas, Belma
Dede, Oezlem
Culfaz, Ali
Kalıpçılar, Halil
MFI type zeolite membranes were synthesized in a recirculating flow system at 95 degrees C where the synthesis solution was flown over the tubular alpha-alumina supports. The performance of the membranes for the separation of binary gas mixtures and alcohol/water liquid mixtures was investigated. A membrane synthesized by two consecutive synthesis steps had a separation selectivity of 15 and 11 for equimolar mixtures of n-C4H10/CH4 and n-C4H10/N-2 at 200 degrees C, respectively. The membrane selectively permeated large nC(4)H(10) over small CH4 and N-2, suggesting that the separation is essentially adsorption-based and the membrane has few nonselective intercrystalline pores. The selectivities in the pervaporation separation of 5% ethanol/95% water mixture were 43 and 23 with permeate fluxes of 0.2 and 1.9 kg/m(2) h at 25 and 85 degrees C, respectively. The separation performance of membranes showed that MFI type membranes prepared in a recirculating flow system can be used both in the separation of gas and liquid mixtures.

Citation Formats
B. Soydas, O. Dede, A. Culfaz, and H. Kalıpçılar, “Separation of gas and organic/water mixtures by MFI type zeolite membranes synthesized in a flow system,” MICROPOROUS AND MESOPOROUS MATERIALS, vol. 127, pp. 96–103, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43148.