Abstract
Nickel catalysts supported on γ–Al2O3 doped with La2O3 and alkaline earth oxides (MgO, CaO, and SrO) were investigated in the dry reforming of methane. The samples were prepared with wet impregnation method and characterized by BET surface area, X–ray diffraction (XRD), and scanning electron microscopy (SEM) techniques. The results showed that addition of these dopants decrease the specific surface area (SBET) of oxides and/or catalysts. XRD results revealed the presence of different phases of Al2O3, as well as La(OH)3, La2O2CO3, MgO, CaCO3 and SrCO3. The addition of alkaline earth promoters (MgO, CaO, and SrO) increased the catalytic activity and stability of the catalysts. The Ni/SrLaAl catalyst presented the best activity and stability, which is explained by the strong basicity of strontium. SEM analysis after reaction indicates formation of carbon over the spent catalyst and that addition of strontium stabilized the surface of the catalyst by homogeneous dispersion of the particles.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.