Hydrogen Separation Using Pt-Alumina Impregnated Membrane

Mohammed N. Kajama, Ngozi C. Nwogu, Edidiong O. Okon, Habiba Shehu, Ify Orakwe, Edward Gobina

Centre for Process Integration and Membrane Technology, (CPIMT), School of Engineering, The Robert Gordon University, Aberdeen, UK.

DOI: 10.4236/epe.2015.79039                

Abstract

A tubular commercial mesoporous support was used to prepare a Pt impregnated membrane using the reservoir method and tested for moderate temperature (300°C) gas transport of hydrogen (H₂), helium (He) and nitrogen (N₂) gas molecules. H₂ and N₂ gas permeation of 6.1 and 4.5 l/min at 1.0 barg feed pressure and 25°C respectively was obtained from the support. On the other hand, H₂ and N₂ gas permeation of 4.6 and 1.7 l/min at 1.0 barg feed pressure and 25°C respectively was also obtained from the Pt membrane. Selectivity of H₂ over He of 1.96 at 300°C and 1.6 barg for the Pt membrane was obtained and found to be higher than that of the theoretical Knudsen selectivity. Also, a selectivity of H₂ over N₂ of 2.72 at 25°C and 1.0 barg was obtained and found to be close to that of the theoretical Knudsen selectivity. The gas permeation and the selectivity performance of the membrane were evaluated.

Keywords

Tubular Support, Pt Membrane, Hydrogen Selectivity, Permeation Temperature

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Kanezashi, M. and Asaeda, M. (2006) Hydrogen Permeation Characteristics and Stability of Ni-Doped Silica Membranes in Steam at High Temperature. Journal of Membrane Science, 271, 86-93. http://dx.doi.org/10.1016/j.memsci.2005.07.011
[2]	Sun, Y.-M. and Khang, S.-J. (1988) Catalytic Membrane for Simultaneous Chemical Reaction and Separation Applied to a Dehydrogenation Reaction. Industrial & Engineering Chemistry Research, 27, 1136-1142. http://dx.doi.org/10.1021/ie00079a008
[3]	Tsotsis, T.T., Champagnie, A.M., Vasileiadis, S.P., Ziaka, Z.D. and Minet, R.G. (1993) The Enhancement of Reaction Yield through the Use of High Temperature Membrane Reactors. Separation Science and Technology, 28, 397-422. http://dx.doi.org/10.1080/01496399308019497
[4]	Chai, M., Machida, M., Eguchi, K. and Arai, H. (1994) Promotion of Hydrogen Permeation on Metal-dispersed Alumina Membranes and Its Application to a Membrane Reactor for Methane Steam Reforming. Applied Catalysis A: General, 110, 239-250. http://dx.doi.org/10.1016/0926-860X(94)80199-1
[5]	Lewis, A.E., Kershner, D.C., Paglieri, S.N., Slepicka, M.J. and Way, J.D. (2013) Pd-Pt/YSZ Composite Membranes for Hydrogen Separation from Synthetic Water-Gas Shift Streams. Journal of Membrane Science, 437, 257-264. http://dx.doi.org/10.1016/j.memsci.2013.02.056
[6]	Bose, A.C. (2009) Inorganic Membranes for Energy and Environmental Applications. Springer, New York. http://dx.doi.org/10.1007/978-0-387-34526-0
[7]	Howard, B.H. and Morreale, B.D. (2008) Effect of H2S on Performance of Pd4Pt Alloy Membranes. Energy Materials, 3, 177-185. http://dx.doi.org/10.1179/174892309X12519750237717
[8]	Bischoff, B.L. and Judkins, R.R. (2011) Development of Inorganic Membranes for Hydrogen Separation.
[9]	Uzio, D., Miachon, S. and Dalmon, J.-A. (2003) Controlled Pt Deposition in Membrane Mesoporous Top Layers. Catalysis Today, 82, 67-74. http://dx.doi.org/10.1016/S0920-5861(03)00203-7
[10]	Gopalakrishnan, S. and Diniz da Costa, J. C. (2008) Hydrogen Gas Mixture Separation by CVD Silica Membrane. Journal of Membrane Science, 323, 144-147. http://dx.doi.org/10.1016/j.memsci.2008.06.016
[11]	Kajama, M.N., Nwogu, N.C. and Gobina, E. (2014) Hydrogen Separation Using Silica-Based Composite Membranes. Advanced Materials Research, 1051, 107-111.