Use of Al2O3–SnO2 as a support of Pt for selective dehydrogenation of light paraffins

✍ Scribed by Adriana D. Ballarini; Claudia G. Ricci; Sergio R. de Miguel; Osvaldo A. Scelza

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 896 KB
• Volume: 133-135
• Category: Article
• ISSN: 0920-5861
• DOI: 10.1016/j.cattod.2007.11.055

✦ Synopsis

The influence of the preparation methods of Al 2 O 3 -SnO 2 on the catalytic behaviour of Pt supported on the above supports in the n-butane dehydrogenation reaction was studied. Two methods were used for the preparation of the support with different Sn loadings: (i) incipient impregnation and (ii) impregnation with an excess of solution. It was determined that the second preparation method would lead to more homogeneous catalysts than the incipient impregnation with SnCl 2 . Different characterization techniques (XPS, TPR, SEM, test reactions of the acidic and metallic functions, H 2 chemisorption) showed that geometric effects and also possible electronic effects between Pt and Sn with probable alloys formation could take place in Pt/Al 2 O 3 -SnO 2 catalysts. In all cases it was found an excellent behaviour in the n-butane dehydrogenation even when higher Sn contents in the support were used.