Direct dehydrogenation of n-butane over Pt/Sn/M/γ-Al2O3 catalysts: Effect of third metal (M) addition

A series of Pt/Sn/M/gamma-Al2O3 catalysts with different third metal (M = Zn, In, Y, Bi, and Ga) were prepared by a sequential impregnation method for use in the direct dehydrogenation of n-butane to n-butene and 1,3-butadiene. In the direct dehydrogenation of n-butane, Pt/Sn/Zn/gamma-Al2O3 catalyst showed the best catalytic performance. Catalytic performance decreased in the order of Pt/Sn/Zn/gamma-Al2O3 > Pt/Sn/In/gamma-Al2O3 > Pt/Sn/gamma-Al2O3 > Pt/Sn/Y/gamma-Al2O3 > Pt/Sn/Bi/gamma-Al2O3 > Pt/Sn/Ga/gamma-Al2O3. The catalytic performance increased with increasing metal-support interaction and Pt surface area of the catalyst. (C) 2014 Elsevier B.V. All rights reserved.