Hydrogen-permeable membrane

Uemiya, S., N. Sato, H. Ando, T. Matsuda, and E. Kikuchi, Steam reforming of methane in a hydrogen permeable membrane reactor, Appl. Catal., 67,223-230,1991c. 

Figure 8.10 Phenol synthesis by direct hydroxylation of benzene using a hydrogen-permeable membrane. (Adapted from [83]).

Uemiya, S. Sato, N. Ando, H. Matsuda, K. Kikuchi, E. Steam Reforming of methane in a Hydrogen Permeable Membrane Reactor Applied Catalysis 67 (1991b) 223-230. 

B. Palladium and Palladium Alloys as Hydrogen-Permeable Membrane Catalysts of Hydrogenation and Dehydrogenation... 

Yu. M. Serov, O.S. Gur yanova, S.G. Gul yanova, and V.M. Gryaznov, Hydrogenation of CO over hydrogen permeable membrane catalysts at atmospheric pressure, Chem. Synthesis Based on Cl Molecules. Abstracts of papers of Vsesouzn. Conf. Moscow, Topchiev Inst, of Petrochemical Synthesis, 1984, p. 28. 

D.J. Edlund, D. Friesen, B. Johnson, and W.A. Pledger, Hydrogen-permeable membranes for high-temperature gas sejiaration. Gas Sep, Purif, 131 (1994). 

Tong, J. and Matsumura, Y., Effect of catalytic activity on methane steam reforming in hydrogen-permeable membrane reactor, Appl. Catal. A, 286, 226, 2005. 

Figure 6.2. Process configuration for the traditional, two-stage WGS method (a) and for a hydrogen-permeable membrane adiabatic reactor (b). Reproduced from Ma and Lund.29...

Fig. 11.14. Process flow sheet of cyclohexane/benzene heat pump using hydrogen permeable membranes Rdit and R/rdehydrogenation and hydrogenation reactors C, compressors T, turbine HE, heat exchangers CHE, counter-current heat exchangers P, liquid pump M, hydrogen membranes. Reproduced from Cacciola et al. [133] with permission.

S. Laegsgaard and P.E. Jorgensen, H. Nielsen and P. Lehrmann, Stream reforming of methane in a hydrogen-permeable membrane reactor. Paper presented at the 1st International Workshop on Catalytic Membranes, September 1994, Lyon-Villeurbanne, France. 

G. Cacciola, Y.I. Aristov, G. Restuccia and V.N. Parmon, Influence of hydrogen-permeable membranes upon the efficiency of the high temperature chemical heat pumps based on cyclohexane dehydrogenation, benzene hydrogenation reactions. Int. J. Hydrogen Energy, 18 (1993) 673. 

The third sub-configuration (C) uses oxygen permeable membranes instead of hydrogen permeable membranes. Again air is used as an oxygen source in... 

The equilibrium constant Kp (see equations above) decreases with increasing temperature. Thus, low temperatures favor product formation in the WGS reaction. The equilibrium can also be shifted towards the right by increasing the steam concentration or removing a product from the reaction mixture (i.e., hydrogen through a hydrogen permeable membrane). 

Optimize the hydrogen-permeable membrane composition and operating procedures, and compare to water gas shift approach for CO clean-up. 

Figure 5. Photo of ItmovaTek s Hydrogen-Permeable Membrane Component...

Norby T, Farting Y. mixed hydrogen ion-electronic conductors for hydrogen permeable membranes. Solid State Ionics. 2000 136-137 139-148. 

Edlund DJ. Hydrogen permeable membrane and method for producing same. US Patent... 

It was not equally obvious that dense ceramic hydrogen-permeable membranes would be of similar interest. There are clearly needs for hydrogen purification membranes, but polymers and microporous materials as well as metals such as palladium and its alloys appeared to fill these needs. In addition, possible candidates for dense ceramic hydrogen-permeable materials were not as appealing as the oxygen-permeable ones in terms of performance and stability. 

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