Y membranes

Although hydrogen is believed to suppress the formation of carbon deposits, coking may still occur in hydrogenation reactions as well. During ethylene hydrogenation, extensive coke deposits are noticed on the feed side of Pd-Y membranes and are believed to eventually lead to the embrittlement and rupture of the dense membranes due to carbon diffusion inside the membrane [Al-Shammary et al., 1991]. A modest deposit of carbon could actually increase the selective formation of ethane which may be indicative of some reaction taking place on the carbon deposit. 

Zhou D, Zou H, Ni J, Wang H, Yang L, and Zhang Y. Membrane affinity chromatography for analysis and purification of biopolymers. Chromatographia 1999 50 23-27. 

Okamoto K, Kita H, Kondo M, Miyake N, and Matsuo Y. Membrane for liquid mixture separation. US Patent 5,554,286. 1996. 

The cells were concentrated by passing through a Millipore cassette using tangential filtration flow system which utilized 15 square feet of 0.45 y membranes. The circulation rate was maintained at 6 liters per minute with an input pressure of 8 psi and an output pressure of 6 psi. 

Li, Y., Membrane-based protein preconcentration microfluidic devices, M.S. Thesis, Brigham Young University, 2006. 

Park H, Kim Y, Kim H, Kang Y. Membrane formation by water vapor induced phase inversion. JMembr Sci. 1999 156(2) 169-178. 

Bernardo P, Algieii C, Barbieri G, Drioli E. Catalytic (Pt-Y) membranes for the purification of Hj-rich streams. Catal Today 2006 118(1-2) 90-97. 

Ping Chu, H., Li, X.-Y, Membrane fouling in a membrane bioreactor (MBR) Sludge cake formation and fouling characteristics. Biotechnology and Bioengineering 2005, 90, 323-331. 

Yin, J., Yao, X., Lion, J.-Y., Sun, W., Sun, Y.-S., Wang, Y. Membranes with highly ordered straight nanopores by selective swelling of fast perpendicularly aligned block copolymers. ACS Nano 7, 9961 (2013)... 

Sotowa et al. prepared zeolite Y membranes ion-exchanged with platinum and different silica-coated/rhodium loaded yalumina membranes for the preferential oxidation of carbon monoxide [552]. The membranes were coated onto a-alumina tubes. While the defect-free thickness of the zeolite membranes was around 3 pm, the combined silica/y-alumina membrane was of 200- and 700-nm thickness. 

CO concentration measured at the MR exit versus feed pressure for different Pt/Na-Y membranes. (Reprinted from Separation and PurificationTechnology 62, Bernardo RAIgieri C, Barbieri G, Drioli E, Hydrogen purification from carbon monoxide by means of selective oxidation using zeolite catalytic membranes, 629-635, Copyright (2008) with permission of Elsevier.)... 

White J C, Dutta P K, Shqan K and Verweij H (2010), Synthesis of nltrathin zeolite Y membranes and their apphcation for separation of carbon dioxide and nitrogen gases , Langmuir, 26,10287-10293. 

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