abstracts - Институт катализа им. Г.К. Борескова

PL-3parameters. Another strategy has been used to circumvent this problem is to design catalystswith components able to store or release oxygen during reaction conditions.The conventional catalysts used in the industrial reforming processes are aluminasupportedNi catalysts due to their low price and high conversion. However, the main problemof Ni catalysts is their low stability because of carbon deposition and metal sintering underoperating conditions. Nevertheless, numerous effective nickel-containing catalysts forreforming processes have been developed by incorporation on suitable supports, such as usingalkali and alkaline earth oxides or mixed oxides. It has been proved that the passivation of Nicontainingcatalysts with sulphur [5] greatly affects the cooking tendency.Compared with the non-noble metal catalysts the noble metal catalysts exhibit excellentactivities and selectivity, and higher stability, due to lower sensitivity to carbon deposition [6,7]. Comparing the catalysts based on nickel, ruthenium, rhodium, palladium, iridium, andplatinum it has been found that noble metal catalysts show high selectivity for carbon-freeoperation during reaction of methane reforming with carbon dioxide. However, the majordrawback of the noble metal catalysts is their high cost and limited availability, which restricttheir potential use in the industrial processes. Therefore, the modification of Ni-basedcatalysts by small amount of noble metal can result in a non-expensive bimetallic supportedsystem assuring both high activity of the catalyst and its low carbon deposition.References:1 Deluga, G.A., Salge, J.R., Schimidt, L.D., Verykios, X.E., Science 303, 993 (2004)2 D. Gray, G. Tomlinson, in: Proc. 29 Int.Conf. Coal Utilization & Fuel Systems 2 (2004)831.3 J.M. Bockris, Int. J. Hydrogen Energy 24 (1999) 1.4 Deluga, G.A., Salge, J.R., Schimidt, L.D., Verykios, X.E., Science 303, 993 (2004) 5.5 K. Asami, T. Fujita, K.I. Kusakabe, Y. Nishiyama, Y. Ohtsuka, Appl. Catal. A: Gen. 126(1995) 245.6 S. Damyanova, J.M.C. Bueno, Appl. Catal. A: Gen. 253 (2003) 135.7 R.B.A., S. Damyanova, G. Gouliev, L.Petrov, J.M.C.Bueno, C.M.P.Marques, J. Phys.Chem. B 108 (2004) 5349.13