Use of Nanoporous Ceramic Membranes for Carbon Dioxide Separation

Use of Nanoporous Ceramic Membranes for Carbon Dioxide Separation

M. N. Kajama N. C. Nwogu E. Gobina 

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

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Natural gas processes accounts for about 5.3 billion tonnes per year of carbon dioxide (CO2) emission to the atmosphere. At this rate of emission, the expectation will drastically rise if not curtailed. In order to achieve this, a cost-effective and environmental friendly technology is required. In recent times, membrane technology has been widely applied for CO2  removal from raw natural gas components. This article examines CO2 separation from natural gas, mainly methane (CH4), through a mesoporous composite membrane. A laboratory scale tubular silica membrane with a permeable length of 348 mm, I.D and O.D of 7 and 10 mm, respectively, was used in this experiment. Scanning electron microscopy (SEM) was used to analyze the morphology of the membrane. Single gas permeation of helium (He), CH4, nitrogen (N2), argon (Ar) and CO2  were determined at permeation temperature range between 25 and 100°C and feed gauge pressure of 0.05 to 5.0 barg. Before silica modification, He recorded the highest flow rate (0.3745 l/min) while CO2 recorded the least flow rate (0.1351 l/min) at 0.4 barg and 25°C. After silica modification, CO2 flow enhances significantly (3.1180 l/min at 1.0 barg) compared to CH4  (2.1200 l/min at the same gauge pressure) due to the influence of surface flow mechanism. Temperature variation described the applicability of Knudsen diffusion for He. A combination of viscous, surface and Knudsen diffusion transport mechanisms were obtained throughout the experiment. Membrane thickness was also calculated to be 2.5 × 10−4 m.


Carbon dioxide removal, dip-coating, gas permeation, nanoporous ceramic membranes, natural gas separation, permeation temperature, surface flow


[1] scuhn054Q5WX vFD9uRG9Xw.2 (Accessed on 29/04/2014).

[2] Adewole, J.K., Ahmad, A.L., Ismail, S. & Leo, C.P., Current challenges in membrane separation of CO2 from natural gas: A review. International Journal of Greenhouse Gas Control, 17, pp. 46–65, 2013.

[3] Rui, Z., Ji, H. & Lin, Y.S., Modeling and analysis of ceramic-carbonate dual-phase membrane reactor for carbon dioxide reforming with methane. International Journal of Hydrogen Energy, 36(14), pp. 8292–8300, 2011.

[4] Brunetti, A., Scura, F., Barbieri, G. & Drioli, E., Membrane technologies for CO2 sepa- ration. Journal of Membrane Science, 359(1), pp. 115–125, 2010.

[5] (Accessed on 29/04/2014).

[6] International    Energy    Outlook    2013, 2013SUM.pdf

[7] Pejman, A.N., Akbar, B.A., Elham, J., Majid, P. & Masoumeh, A.A., An optimum routine for surface modification of ceramic supports to facilitate deposition of defect- free overlaying micro and meso (nano) porous membrane. Iran. J. Chem. Eng., 30(3), pp. 63–73, 2011.

[8] Lu, G.Q., Diniz da Costa, J.C., Duke, M., Giessler, S., Socolow, R., Williams, R.H. & Kreutz, T., Inorganic membranes for hydrogen production and purification: A critical review and perspective. Journal of Colloid and Interface Science, 314(2), pp. 589–603, 2007.

[9] Zhang, L., Park, I.S., Shqau, K., Winston Ho, W.S. & Verweij, H., Supported inorganic membranes. Promises & Challenges. JOM, 61(4), pp. 61–71, 2009.

[10] Ahmad, A.L. & Mustafa, N.N.N., Sol-gel synthesized of nanocomposite palladium-alu- mina ceramic membrane for H2 permeability: Preparation and characterisation. Inter-national Journal of Hydrogen Energy, 32(12), pp. 2010–2021, 2007.

[11] Adom, P.K., Bekoe, W., Amuakwa-Mensah, F., Mensah, J.T. & Botchway, E., Carbon dioxide emissions, economic growth, industrial structure, and technical efficiency: Empirical evidence from Ghana, Senegal, and Morocco on the causal dynamics. Energy, 47(1), pp. 314–325, 2012.

[12] Othman, M.R., Mukhtar, H. & Ahmad, A.L., Gas permeation characteristics across nano-porous inorganic membranes. IIUM Engineering Journal, 5(2), pp. 17–33, 2004.

[13] Anwu, Li., Hongbin, Z., Jinghua, GU. & Guoxing, X., Preparation of -Al2O3 compos- ite membrane and examination of membrane defects. Science of China (Series B), 40, pp. 31–36, 1997.

[14] Lee, D. & Oyama, S.T., Gas permeation characteristics of a hydrogen selective sup- ported silica membrane. Journal of Membrane Science, 210(2), pp. 291–306, 2002.

[15] Ohwoka, A., Ogbuke, I. & Gobina, E., Performance of pure and mixed gas transport in reconfigured hybrid inorganic membranes part 2. Membrane Technology, 2012(6), pp. 7–9, 2012.

[16] Wall, Y., Braun, G. & Brunner, G., Gas transport through ceramic membranes under super-critical conditions. Desalination, 250(3), pp. 1056–1059, 2010.

[17] Mulder, M., Basic Principles of Membrane Technology, Second Edition, Centre of Membrane Science and Technology. Kluwer Academic Publishers, University of Twente, Enschede, The Netherlands, pp. 227, 1996.

[18] Scholes, C.A., Kentish, S.E. & Stevens, G.W., Carbon dioxide separation through polymeric membrane systems for flue gas applications. Recent Patents on Chemical Engineering, 1(1), pp. 52–66, 2008.

[19] Kim, Y.S., Kusakabe, K., Morooka, S. & Yang, S.M., Preparation of microporous silica membranes for gas separation. Korean Journal of Chemical Engineering, 18(1), pp. 106–112, 2001.

[20] Gobina, E., Apparatus and Methods for Separating Gases. United States Granted Patent No. US 7,048,778, May 23, 2006.

[21] Nwogu, N.C., Gobina, E. & Kajama, M.N., Improved carbon dioxide capture using nanostructured ceramic membranes. Low Carbon Economy, 4(3), pp. 125–128, 2013.

[22] Zhu, J., Fan, Y. & Xu, N., Modified dip-coating method for preparation of pinhole-free ceramic membranes. Journal of Membrane Science, 367(1), pp. 14–20, 2011.

[23] Jin, Z., Yiqun, F. & Nanping, X., Preparation and characterization of alumina mem- branes on capillary supports: Effects of film-coating on crack-free membrane prepara- tion. Chinese Journal of Chemical Engineering, 18(3), pp. 377–383, 2010.

[24] Keizer, K., Uhlhorn, R.J.R. & Burggraaf, A.J. Gas separation mechanisms in micropo- rous modified -Al2O3 membranes. Journal of Membrane Science, 39(3), pp. 285–300, 1988.