On-board hydrogen generation for fuel cell-powered vehicles: The use of methanol and propane
Topics in Catalysis, cilt.22, sa.3-4, ss.359-367, 2003 (Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 22 Sayı: 3-4
- Basım Tarihi: 2003
- Doi Numarası: 10.1023/a:1023504826480
- Dergi Adı: Topics in Catalysis
- Derginin Tarandığı İndeksler: Scopus
- Sayfa Sayıları: ss.359-367
- Anahtar Kelimeler: Fuel cells, Hydrogen, Methanol, Partial oxidation, Propane
- Boğaziçi Üniversitesi Adresli: Evet
Özet
The use of methanol and propane in on-board hydrogen generation for mobile fuel cell applications was studied by series of computer simulations. A combination of total oxidation and steam reforming (indirect partial oxidation) on bimetallic catalysts (Pt-Ni for propane, Pt-Cu/ZnO for methanol) and one-step, direct partial oxidation on Pt-coated monoliths for propane and Rh gauze for methanol were considered as the two alternative operations. Simulations based on the thermodynamics of the two operations indicated indirect partial oxidation of propane as the best option in terms of hydrogen yield. The optimum hydrogen yield occurred at a steam/carbon ratio of ∼ 2:1, which is below 2.5 and might lead to coking on nickel. Operating the system with ratios > 2.5 allowed the use of nickel with lower hydrogen yield but still greater than that of methanol. Simulations based on the kinetics of the indirect partial oxidation reactions indicated that propane is the preferred fuel but that the system requires higher steam/carbon ratios thus, favoring the use of nickel.