Effect of preparation methods of CeO₂ on the properties and performance of Ni/CeO₂ in CO₂ reforming of CH₄.

ABSTRACT: CO₂ reforming of CH₄ (CRM) is not only beneficial to environmental protection, but also valuable for industrial application. Different CeO₂ supports were prepared to investigate the matching between Ni and CeO₂ over Ni/CeO₂ and its effect on CRM. The physicochemical properties of Ni/CeO₂-C (commercial CeO₂), Ni/CeO₂-H (hydrothermal method) as well as Ni/CeO₂-P (precipitation method) were characterized by XRD, N₂ adsorption at - 196 °C, TEM, SEM-EDS, H₂-TPR, NH₃-TPD and XPS. Ni⁰ with good dispersion and CeO₂ with more oxygen vacancies were obtained on Ni/CeO₂-H, proving the influence on Ni/CeO₂ catalysts caused by the preparation methods of CeO₂. The initial conversion of both CO₂ and CH₄ of Ni/CeO₂-H was more than five times that of Ni/CeO₂-P and Ni/CeO₂-C. The better matching between Ni and CeO₂ on Ni/CeO₂-H was the reason for its best catalytic performance in comparison with the Ni/CeO₂-C and Ni/CeO₂-P samples.

SUBMITTER: Ni Z 

PROVIDER: S-EPMC8964754 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature