AlZn based Co and Ni catalysts for the partial oxidation of bioethanol - influence of different synthesis procedures

• Authors: Heike Ehrich , Elka Kraleva
• Languages of publication: EN

Abstracts

EN

The catalytic performance of Co and Ni catalysts on AlZn mixed oxide supports depends on the synthesis procedure used for their preparation. For this study CoAlZn and NiAlZn catalysts were prepared by conventional sol-gel synthesis of the mixed oxide and subsequent impregnation of the support with the transition metal (SG = sol gel method) as well as by a single-step method were a gel is formed based on salts of all components using citric acid as chelating agent (CM = citrate method). The structure and morphology of the catalysts were characterized by nitrogen sorption, XRD and TPR measurements. They showed high activity in the partial oxidation of ethanol at 600–750 °C, but their properties depend on the preparation method. The higher performance of the catalysts prepared by the citrate method, where the transition metal is incorporated into the crystal structure of the support during preparation, is based on a change in morphology and structure, resulting in more active sites exposed on the surface. Compared to the Co catalysts, Ni catalysts showed a higher performance. This might be due to the higher reducibility and the smaller Ni particles size, which allows a better interaction with the support in NiAlZn catalysts.

Keywords

EN

Ethanol partial oxidation; Hydrogen generation; Sol-gel method; Citrate method; Transition metal catalysts

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2014
• Volume: 12
• Issue: 12
• Pages: 1285-1293

Dates

published

1 - 12 - 2014

online

7 - 6 - 2014

Contributors

author

Heike Ehrich

• Leibniz Institute for Catalysis (LIKAT)

author

Elka Kraleva

• Leibniz Institute for Catalysis (LIKAT)

References

• [1] M. Ni, D.Y.C. Leung, K.K.H. Leung, Int. J. Hydrogen Energy 32, 3238 (2007) http://dx.doi.org/10.1016/j.ijhydene.2007.04.038[Crossref]
• [2] M. Boltze, G. Holstermann, A. Sommerfeld, A. Herzog, In: 10th European SOFC Forum, 26–29 June 2012, Lucerne, Switzerland
• [3] L.V. Mattos, F.B. Noronha, J. Power Sources 145, 10 (2005) http://dx.doi.org/10.1016/j.jpowsour.2004.12.034[Crossref]
• [4] J.R. Salge, G.A. Deluga, L.D. Schmidt, J. Catal. 235, 69 (2005) http://dx.doi.org/10.1016/j.jcat.2005.07.021[Crossref]
• [5] S.N. Hsu, J.L. Bi, W.F. Wang, C.T. Yeh, C.B. Wang, Int. J. Hydrogen Energy 33, 693 (2008) http://dx.doi.org/10.1016/j.ijhydene.2007.10.007[Crossref]
• [6] N. Hebben, C. Diehm, O. Deutschmann, Appl. Catal. A: Gen. 388, 225 (2010) http://dx.doi.org/10.1016/j.apcata.2010.08.055[Crossref]
• [7] E. Kraleva, S. Sokolov, M. Schneider, H. Ehrich, Int. J. Hydrogen Energy 38, 4380 (2013) http://dx.doi.org/10.1016/j.ijhydene.2013.01.190[Crossref]
• [8] C.P. Rodrigues, V.T. Silva, M. Schmal, Appl. Catal. B: Environ. 96, 1 (2010) http://dx.doi.org/10.1016/j.apcatb.2010.01.027[Crossref]
• [9] M.C. Sánchez-Sánchez, R.M. Navarro, J.L.G. Fierro, Int. J. Hydrogen Energy 32, 1462 (2007) http://dx.doi.org/10.1016/j.ijhydene.2006.10.025[Crossref]
• [10] S.M. Lima, A.M. Silva, L.O.O. Costa, U.M. Graham, G. Jacobs, B.H. Davis, L.V. Mattos, F.B. Noronha, J. Catal. 268, 268 (2009) http://dx.doi.org/10.1016/j.jcat.2009.09.025[Crossref]
• [11] E. Kraleva, H. Ehrich, J. Sol-Gel Sci. Technol. 64, 619 (2012) http://dx.doi.org/10.1007/s10971-012-2893-5[Crossref]
• [12] E. Kraleva, S. Sokolov, G. Nasillo, U. Bentrup, H. Ehrich, Int. J. Hydrogen Energy 39, 209 (2014) http://dx.doi.org/10.1016/j.ijhydene.2013.10.072[Crossref]
• [13] S.J. Gregg, K.S.W. Sing, Adsorption Surface Area and Porosity (Academic Press, New York, 1982)
• [14] P. Schneider, Appl. Catal. A: Gen. 129, 157 (1995) http://dx.doi.org/10.1016/0926-860X(95)00110-7[Crossref]
• [15] W. Trakarnpruk, C. Sukkaew, J. Alloys Comp. 460, 565 (2008) http://dx.doi.org/10.1016/j.jallcom.2007.06.018[Crossref]
• [16] M.N. Barroso, M.F. Gomez, L.A. Arrúa, M.C. Abello, Appl. Catal. A: Gen. 304, 116 (2006) http://dx.doi.org/10.1016/j.apcata.2006.02.033[Crossref]
• [17] M.N. Barroso, M.F. Gomez, L.A. Arrúa, M.C. Abello, Chem. Eng. J. 158, 225 (2010) http://dx.doi.org/10.1016/j.cej.2009.10.064[Crossref]
• [18] A. Monzón, E. Romeo, C. Royo, R. Trujillano, F.M. Labajos, V. Rives, Appl. Catal. A: Gen. 185, 53 (1999) http://dx.doi.org/10.1016/S0926-860X(99)00101-5[Crossref]
• [19] S. Damyanova, B. Pawelec, K. Arishtirova, J.L.G. Fierro, Int. J. Hydrogen Energy 37, 15966 (2012) http://dx.doi.org/10.1016/j.ijhydene.2012.08.056[Crossref]

Identifiers

DOI

10.2478/s11532-014-0573-8