The effects of Co/Ce loading ratio and reaction conditions on CDRM performance of Co–Ce/ZrO2 catalysts
International Journal of Hydrogen Energy, cilt.43, sa.9, ss.4321-4334, 2018 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 43 Sayı: 9
- Basım Tarihi: 2018
- Doi Numarası: 10.1016/j.ijhydene.2018.01.009
- Dergi Adı: International Journal of Hydrogen Energy
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.4321-4334
- Anahtar Kelimeler: Catalytic H2 production, CO2 utilization, Methane dry reforming, Non-PGM catalyst
- Boğaziçi Üniversitesi Adresli: Evet
Özet
This work mainly aims to establish a link between Co/Ce loading ratio in Co–Ce/ZrO2 catalysts and their Carbon Dioxide Reforming of Methane (CDRM) performance. In this context, catalysts with different Co and Ce loadings were prepared and characterized via BET, XRD, HRTEM-EDX, XPS and Raman, and parametrically tested under different CDRM conditions. Dispersion of Co particles was nonhomogeneous on all samples. For the sample with the highest Co/Ce ratio (10%Co–2%Ce/ZrO2), higher amount of lattice oxygen vacancies and lowest degree of ceria reduction were determined. Raman analysis showed that graphitic carbon coexisted with amorphous carbon on the surface of all spent samples. The extent of side reactions prevailed in determining selectivity. It was expressed that both Co–Ce synergistic interaction and synchronous contribution of Ce and ZrO2 were enhanced for the samples having lower Co/Ce ratio. It was confirmed that Ce is only responsible for oxygen transfer but not its formation.