Effect of Precursor on Physicochemical Properties and Catalytic Performance of Ni-Co over Mixed Nano-oxides of Al-Mg-Zr Used in Dry Reforming of CH4

Ni-Co over mixed nano-oxides of Al-Mg-Zr have been synthesized by sol–gel technique with two different precursors of zirconia i.e. zirconyl nitrate hydrate (ZNH) and zirconyl nitrate solution, 35wt% solution dilute nitric acid (ZNS) and used in dry reforming of methane. Both nanocatalysts have been characterized by XRD and FESEM analysis. Comparing XRD patterns of synthesized samples revealed that nanocatalyst employed ZNS (NCZNS) has a suitable crystalline structure which improves catalytic activity. In contrast, the amorphous behavior was intensified in the other one which used ZNH (NCZNH). FESEM results of NCZNS indicated uniform, homogeneous and well dispersed particle size. The synthesized nanocatalysts showed high catalytic activity and stability during 1440 min. It was observed that NCZNS has better catalytic performance. The results confirmed the remarkable effect of zirconia precursor on the sample morphology, structure and catalytic activity

کلیدواژه ها:

Dry reforming ، Synthesis gas ، Ni-Co/Al2O3-MgO-ZrO2 ، Nanocatalysts ، Sol-Gel