Role of Ca, Cr, Ga and Gd promotor over lanthana?zirconia–supported Ni catalyst towards H ₂ ?rich syngas production through dry reforming of methane

Hydrogen production through methane dry reforming holds the promise of lowering greenhouse gases, that is CO2 and CH4, concentrations. Herein, Ca-, Cr-, Ga- Gd-promoted lanthana-zirconia–supported Ni catalysts are investigated characterized by X-ray diffraction, Raman, infrared UV-vis spectroscopy, CH4-temperature programmed surface reaction cyclic reduction-desorption experiment. All promoted catalyst systems had high constant hydrogen yield (>70%) due to pronounced reoxidation capacity reduced ‘NiO species strongly interacted with support’ oxygen replenishment CO2. The presence mixed oxide regeneration up optimum level in Gd, as well Cr-promoted catalyst, outperformed (80% initially) than other promotors, Ca Ga. In long run (440 min 33 h), system performed better H2 remained ~79% smallest energy gap between valance conduction band, Ni-Cr interaction for wide range CH4 decomposition chromate profound carbon deposit oxidation.