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Received February 1, 2010
Accepted March 19, 2010
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Steam reforming of liquid petroleum gas over Mn-promoted Ni/γ-Al2O3 catalysts
Division of Energy Systems Research and Division of Chemical Engineering and Materials Engineering, Ajou University, Wonchun-dong Yeongtong-gu, Suwon 443-749, Korea 1Energy and Environment Laboratory, Samsung Advanced Institute of Technology (SAIT), P. O. Box 111, Suwon 440-600, Korea
edpark@ajou.ac.kr
Korean Journal of Chemical Engineering, July 2010, 27(4), 1132-1138(7), 10.1007/s11814-010-0212-9
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Abstract
Three different Mn-promoted Ni/γ-Al2O3 catalysts, Mn/Ni/γ-Al2O3, Mn-Ni/γ-Al2O3 and Ni/Mn/γ-Al2O3, were prepared and applied to the steam reforming of liquid petroleum gas (LPG) mainly composed of propane and butane. For comparison, Ni/γ-Al2O3 catalysts containing different amount of Ni were also examined. In the case of the Ni/γ-Al2O3 catalysts, 4.1 wt% Ni/γ-Al2O3 showed the stable catalytic activity with the least amount of coke formation. Among the various Mn-promoted Ni/γ-Al2O3 catalysts, Mn/Ni/γ-Al2O3 showed the stable catalytic activity with the_x000D_
least amount of coke formation. It also exhibited a similar H2 formation rate compared with Ni/γ-Al2O3. Several characterization techniques--N2 adsorption/desorption, X-ray diffraction (XRD), CO chemisorptions, temperature-programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS) and CHNS analysis--were employed to characterize the catalysts. The catalytic activity increased with increasing amount of chemisorbed CO for the Mn-promoted Ni/γ-Al2O3 catalysts. The highest proportion of Mn^(4+) species was observed for the most stable catalyst.
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References
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Horiuchi T, Sakuma K, Fukui T, Kubo Y, Osaki T, Mori T, Appl. Catal. A: Gen., 144(1-2), 111 (1996)
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Chen YG, Tomishige K, Yokoyama K, Fujimoto K, J. Catal., 184(2), 479 (1999)
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Christensen KO, Chen D, Lodeng R, Holmen A, Appl. Catal. A: Gen., 314(1), 9 (2006)
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Kim JH, Suh DJ, Park TJ, Kim KL, Appl. Catal. A: Gen., 197(2), 191 (2000)
