Study of the Synthesis of Multi-Cationic Sm-Co-O, Sm-Ni-O, Al-Co-O, Al-Ni-O, and Al-Co-Ni-O Aerogels and Their Catalytic Activity in the Dry Reforming of Methane
oleh: Jaroslav Cihlar, Serhii Tkachenko, Vendula Bednarikova, Jaroslav Cihlar, Klara Castkova, Martin Trunec, Ladislav Celko
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2024-05-01 |
Deskripsi
Dense multi-cationic Sm-Co-O, Sm-Ni-O, Al-Co-O, Al-Ni-O, and Al-Ni-Co-O oxide aerogels were prepared by epoxide-driven sol–gel synthesis. Catalysts for dry reformation of methane, Sm<sub>2</sub>O<sub>3</sub>/Co, Sm<sub>2</sub>O<sub>3</sub>/Ni, Al<sub>2</sub>O<sub>3</sub>/Co, Al<sub>2</sub>O<sub>3</sub>/Ni, Al<sub>2</sub>O<sub>3</sub>/Co, and Ni were prepared by reduction of aerogels with hydrogen and their catalytic activities and C-deposition during dry reformation of methane were tested. Catalytic tests showed high methane conversion (93–98%) and C-deposition (0.01–4.35 mg C/g<sub>cat</sub><b><sup>.</sup></b>h). The highest content of C-deposits after catalytic tests was determined for Al<sub>2</sub>O<sub>3</sub>/Co and Al<sub>2</sub>O<sub>3</sub>/Ni catalysts, which was related to the formation of Al alloys with Co and Ni. A uniform distribution of Co<sup>0</sup> and Ni<sup>0</sup> nanoparticles (in the form of a CoNi alloy) was found only for the Al<sub>2</sub>O<sub>3</sub>/Co and Ni catalysts, which showed the highest activity as well as low C deposition.