Kinetics of CO oxidation over Pt-CeOx supported on air-oxidized activated carbon
Turkish Journal of Chemistry, cilt.33, sa.5, ss.589-598, 2009 (SCI-Expanded, Scopus, TRDizin)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 33 Sayı: 5
- Basım Tarihi: 2009
- Doi Numarası: 10.3906/kim-0809-34
- Dergi Adı: Turkish Journal of Chemistry
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
- Sayfa Sayıları: ss.589-598
- Anahtar Kelimeler: Activated carbon supports, Carbon monoxide, Kinetics, Oxidation, PROX, Pt-ceria catalysts
- Boğaziçi Üniversitesi Adresli: Evet
Özet
Kinetics of low-temperature CO oxidation was studied under atmospheric pressure at 383 K in the initial rates region over 1wt%Pt-1wt%CeOx supported on air-oxidized activated carbon (AC2). Feed concentrations of 1-5 mol% CO and 1-2.5 mol% O2 with balance He were used for CO oxidation in the absence of hydrogen. A simple power-function rate expression was obtained with reaction orders of -0.24 in CO and 0.98 in O2, and a plausible LHHW expression compatible with mechanisms reported in the literature was proposed. Feed concentrations of 5 mol% CO and 2.5 mol% O2 were used for investigating the effect of the presence of CO2 or H2 on CO oxidation rates by partially replacing inert He with 2-4 mol% CO2 or 10-60 mol% H2. © TÜBİTAK.