Modification of CeNi<sub>0.9</sub>Zr<sub>0.1</sub>O<sub>3</sub> Perovskite Catalyst by Partially Substituting Yttrium with Zirconia in Dry Reforming of Methane
oleh: Mahmud S. Lanre, Ahmed E. Abasaeed, Anis H. Fakeeha, Ahmed A. Ibrahim, Abdullah A. Alquraini, Salwa B. AlReshaidan, Ahmed S. Al-Fatesh
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-05-01 |
Deskripsi
Methane Dry Reforming is one of the means of producing syngas. CeNi<sub>0.9</sub>Zr<sub>0.1</sub>O<sub>3</sub> catalyst and its modification with yttrium were investigated for CO<sub>2</sub> reforming of methane. The experiment was performed at 800 °C to examine the effect of yttrium loading on catalyst activity, stability, and H<sub>2</sub>/CO ratio. The catalyst activity increased with an increase in yttrium loading with CeNi<sub>0.9</sub>Zr<sub>0.01</sub>Y<sub>0.09</sub>O<sub>3</sub> catalyst demonstrating the best activity with CH<sub>4</sub> conversion >85% and CO<sub>2</sub> conversion >90% while the stability increased with increases in zirconium loading. The specific surface area of samples ranged from 1–9 m<sup>2</sup>/g with a pore size of 12–29 nm. The samples all showed type IV isotherms. The XRD peaks confirmed the formation of a monoclinic phase of zirconium and the well-crystallized structure of the perovskite catalyst. The Temperature Program Reduction analysis (TPR) showed a peak at low-temperature region for the yttrium doped catalyst while the un-modified perovskite catalyst (CeNi<sub>0.9</sub>Zr<sub>0.1</sub>O<sub>3</sub>) showed a slight shift to a moderate temperature region in the TPR profile. The Thermogravimetric analysis (TGA) curve showed a weight loss step in the range of 500–700 °C, with CeNi<sub>0.9</sub>Zr<sub>0.1</sub>O<sub>3</sub> having the least carbon with a weight loss of 20%.