Synthesis of a Multilayer Ceramic Membrane Used for Hydrogen Separation at High Temperature

Document Type : Research Paper

Authors

1 Chemical Engineering Department, Sharif university of Technology, Tehran, Iran

2 Gas Department, Research Institute of petroleum Industry, Tehran, Iran

Abstract

A multilayer composite ceramic membrane was prepared by depositing a nano-scale layer of SiO2 on top of a modified porous alumina support by chemical vapor deposition (CVD) method. The modification of the support was carried out by adding a graded layer of Al2O3 (γ-alumina phase), using sol-gel method. An optimized temperature of 700 K for intermediate layer calcination was gained by XRD analysis. Cross-sectional images obtained from SEM showed that the intermediate γ-alumina layer had a thickness of about 2 μm and the top selective silica layer was quite dense and uniform with a thickness of about 90-100 nm. Permeation tests showed a very good flux of 10-6-10-7 mol m-2 s-2 Pa-1 for H2 with selectivities over CO2, N2 and CH4 up to 500. By performing different tests with various deposition times, it was concluded that by changing CVD time from 3 h to 6 h H2/CO2 selectivity increased from 32 to 573, although H2  permeation flux reduced about 50 percent.

Keywords

References

[1] R. Ramachandran, R.K. Menon, An overview of industrial uses of hydrogen, Int. J. Hydrogen Energy 23 (1998) 593.
[2] R.W. Van Gemert, F.Petrus-Cuperus, Newly developed ceramic membranes for dehydration and separation of organic mixtures by pervaporation, J. Membr. Sci. 105 (1995) 287–291.
[3] N. Wynn, Dehydration with silica pervaporation membranes, Membr. Technol. 2001 (2001) 10–11.
[4] Yasushi Yoshino, Takehiro S., Development of tubular substrates, silica based membranes and membrane modules for hydrogen separation at high temperature, J.Membr. Sci. 267 (2005) 8–17.
[5] J. Lin, I. Kumakiri, B.N. Nair, H. Alsyouri, Microporous ceramic membranes: review, Sep. Purif. Meth. 31 (2) (2002) 229.
[6] R.J.R. Uhlhorn, Ceramic Membranes For Gas Separation, PhD Thesis,University of Twente, Cap. 2, 1990, ISBN 90-9003618-0.
[7] R.M. De Vos, H. Verweij, High-selectivity, high-flux silica membranes for gas separation, Science 279 (1998) 1710–1711.
[8] L.J.P. Van Den Broeke, W.J.W. Bakker, F. Kapteijn, J.A. Moulijn, Binary permeation through a silicalite-1 membrane, AIChE J. 45 (1999) 976–985.
[9] J. Sekulic, M.W.J. Luiten, J.E. Ten Elshof, N.E. Benes, K. Keizer, Microporous silica and doped silica membrane for alcohol dehydration by pervaporation, Desalination 148 (2002) 19–23.
[10] M. Tsapatsis, S. Kim, S.W. Nam, G.R. Gavalas, Synthesis of hydrogen permselective SiO2, TiO2, Al2O3 and B2O3 membranes from the chloride precursors, Ind. Eng. Chem. Res. 30 (1991) 2152.
[11] T. Okubo, H. Inoue, Introduction of specific gas selectivity to porous glass membranes by treatment with tetraethoxysilane, J. Membr. Sci. 42 (1989) 109.
[12] A.K. Prabhu, S.T. Oyama, Highly hydrogen selective ceramic membranes: application to the transformation of gr
[13] G.J. Hwang, K. Onuki, S. Shimizu, H. Ohya, Hydrogen separation in H2–H2O–HI gaseous mixture using the silica membrane prepared by chemical vapor deposition, J. Membr. Sci. 162 (1999) 83.
[14] Y. Yoshino, T. Suzuki, B.N. Nair, H. Taguchi, N. Itoh, Development of tubular substrates, silica based membranes and membrane modules for hydrogen separation at high temperature, J. Membr., Sci. 267, 2005 8.
[15] S. Yan, H. Maeda, K. Kusakabe, S. Morooka, Y. Akiyama, Hydrogenpermselective SiO2 membrane formed in pores of alumina support tube by chemical vapor deposition with tetraethyl orthosilicate, Ind. Eng. Chem.Res. 33 (1994) 2096.
[16] Yunfeng Gu, S. Ted Oyama, Ultrathin, hydrogen-selective silica membranes deposited on alumina-graded structures prepared from size-controlled boehmite sols, J. Memb. Sci. 306 (2007) 216–227.
[17] Yunfeng Gu, Pelin Hacarlioglu, S. Ted Oyama, Hydrothermally stable silica–alumina composite membranes for hydrogen separation, J. Memb. Sci. 310 (2008) 28–37.
eenhouse gases, J. Membr. Sci. 176 (2000) 233.
 
Journal of Petroleum Science and Technology
Volume 1, Issue 2 - Serial Number 2
September 2011
Pages 57-62

Files

Share

How to cite

Statistics