Abstract
In the present work, suitable absorbent material for high temperature desulfurization was investigated in order to apply internally in solid oxide fuel cells (SOFC). It was found that nano-scale high surface area CeO2 has useful desulfurization activity and enables efficient removal of H2S from feed gas between 500 to 850°C. In this range of temperature, compared to the conventional low surface area CeO2, 80–85% of H2S was removed by nano-scale high surface area CeO2, whereas only 30–32% of H2S was removed by conventional low surface area CeO2. According to the XRD studies, the product formed after desulfurization over nano-scale high surface area CeO2 was Ce2O2S. EDS mapping also suggested the uniform distribution of sulfur on the surface of CeO2. Regeneration experiments were then conducted by temperature programmed oxidation (TPO) experiment. Ce2O2S can be recovered to CeO2 after exposure in the oxidation condition at temperature above 600°C. It should be noted that SO2 is the product from this regeneration process. According to the SEM/EDS and XRD measurements, all Ce2O2S forming is converted to CeO2 after oxidative regeneration. As the final step, a deactivation model considering the concentration and temperature dependencies on the desulfurization activity of CeO2 was applied and the experimental results were fitted in this model for later application in the SOFC model.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
D.W. Park, B. H. Hwang, W. D. Ju, M. I. Kim, K. H. Kim and H. C. Woo, Korean J. Chem. Eng., 22, 190 (2005).
J. D. Lee, J. H. Jun, N. K. Park, S. O. Ryu and T. J. Lee, Korean J. Chem. Eng., 22, 36 (2005).
P. R. Westmoreland and D. P. Harrison, Environ. Sci. Technol., 10,559 (1976).
H. T. Jang, S. B. Kim and D. S. Doh, Korean J. Chem. Eng., 20, 116(2003).
T. H. Gardener, Fuel, 81, 2157 (2002).
J. H. Swisher and K. Schwerdtfeger, J. Mater. Eng. Perform., 1, 399(1992).
V. Patrick and G. R. Gavalas, Ind. Eng. Chem. Res., 28, 931 (1989).
V.V. Meng and D. A. R. Kay, High technology ceramics, Elsevier, Amsterdam, 2247 (1987).
D. A. R. Kay, W.G. Wilson and V. Jalan, J. Alloys and Compounds, 192, 11 (1993).
K. H. Kim, S.Y. Lee and K. J. Yoon, Korean J. Chem. Eng., 23, 356(2006).
K.H. Kim, S.Y. Lee, S.W. Nam, T. H. Lim, S. A. Hong and K. J. Yoon, Korean J. Chem. Eng., 23, 17 (2006).
J. Abbasian, A. H. Hill, M. Flytzani-Stephanopoulos and Z. Li, Final Report, DE-FC22-92PC92521 (1994).
Z. Li and M. Flytzani-Stephanopoulos, Ind. Eng. Chem. Res., 36,187 (1997).
Y. Zeng, S. Zhang, F. R. Groves and D. P. Harrison, Chem. Eng. Sci., 54, 3007 (1999).
N. Laosiripojana and S. Assabumrungrat, Applied Catal. B, 60, 107(2005).
N. Orbey, G. Dogu and T. Dogu, Can. J. Chem. Eng., 60, 314 (1982).
H. S. Fogler, Elements of chemical reaction engineering, Prentice-Hall Inc, Englewood Cliffs, New Jersey 07632, ISBN 0-13-263476-7 (1986).
M. P. Cal, B.W. Strickler and A. A. Lizzio, Carbon, 38, 1757 (2000).
R. M. Ferriz, R. J. Gorte and J. M. Vohs, Applied Catal. B, 43, 273(2003).
Z. Wang and M. Flytzani-Stephanopoulos, Energy & Fuels, 19, 2093(2005).
M. Flytzani-Stephanopoulos, Angela D. Surgenor, Report, NASA/ TM-2007-214686.
S. Yasyerli, G. Dogu and T. Dogu, Catal. Today, 117, 271 (2006).
M. Ziolek, J. Molecular Catalysis A, 97, 49 (1995).
T. Dogu, Chem. Eng. J., 21, 213 (1981).
Y. Suyadal, M. Erol and H. Oguz, Ind. Eng. Chem. Res., 39, 724(2000).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kempegowda, R.S., Laosiripojana, N. & Assabumrungrat, S. High temperature desulfurization over nano-scale high surface area ceria for application in SOFC. Korean J. Chem. Eng. 25, 223–230 (2008). https://doi.org/10.1007/s11814-008-0040-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11814-008-0040-3