The Synthesis of Lanthanum Oxide/Ni Catalyst on the CMK-3 for the CO2 reforming of CH4

Abstract

The catalysts with valve metals had been modified to use in the reforming process. Furthermore, there is a trend to the cheaper materials due to the deactivation and high price of the mentioned catalysts. In this case, at the present research work, the Nickel/CMK-3 catalysts with La2O3 as the promoter were synthesized by an impregnation method with 3 wt. % of La2O3. Also, the Nickel catalysts/CMK-3 and Nickel catalysts-La2O3/CMK-3 were characterized by N2 adsorption-desorption, X-ray diffraction (XRD), Transmission electron microscopy (TEM), Field emission scanning electron microscopy(FE-SEM), Temperature programmed reduction (TPR), and the performance of the catalysts for CO2 reforming of CH4. In addition, the temperature programmed reduction (TPR) technique was selected to evaluate the catalyst properties for the CO2 reforming of CH4. In final, the obtained results demonstrated that the formation of amorphous mesoporous Carbon with NiO nanoparticles inside the channels of the supported base and also the Lantana oxide addition induced better Nickel oxide dispersion and increased the interaction of the catalyst particles with support. As a result, the Nickel catalysts supported on the Carbon mesoporous has shown enough activity for the CO2 reforming of CH4 at 650 ºC. However, the mentioned samples were deactivated due to Carbon oxidation according to the TGA results. Therefore, the addition of La2O3 with 3 wt. % as a promoter improved the catalytic activity up to 57% and enhanced the catalytic stability at a duration time of 2 hr.

Keywords

• dioxide carbon gas
• methane
• lanthanum oxide
• promoter
• nickel catalyst