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Combinations of platinum and palladium on alumina supports as oxidation catalysts

Magnus Skoglundh (Institutionen för teknisk kemi) ; Lars Löwendahl (Institutionen för teknisk kemi) ; Jan-Erik Otterstedt (Institutionen för teknisk kemi)
Applied Catalysis (0166-9834). Vol. 77 (1991), 1, p. 9-20.
[Artikel, refereegranskad vetenskaplig]

The effects of the total content of Pd+Pt, the mol-% ratio of Pd to Pt, hydrothermal treatment of the catalyst wash-coat, and the oxygen concentration on the light-off temperature, T50, for the complete oxidation of xylene isomers, propene, and carbon monoxide were studied. The alumina wash-coats were thermally treated at 500°C for 2 h in air or after the thermal treatment, hydrothermslly treated at 814°C for 2 h in 100-% steam. The catalysts were impregnated with 5, 10, and 20 micromol of Pd+Pt per gram of catalyst. The mol-% ratio of Pd to Pt was varied in the range from 0:100 to 100:O. The light-off temperatures had a minimum at a Pd:Pt mol-% ratio of 80:20, and decreased with increasing total metals concentration, increasing oxygen concentration and hydrothermal treatment of the alumina wash-coat.

Nyckelord: platinum, palladium, almina, xylene oxidation, hydrothermal treatment, light-off temperature, bimetal

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Denna post skapades 2012-02-06. Senast ändrad 2013-01-30.
CPL Pubid: 154793


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