(544fg) Molybdenum Enhanced the Catalytic Activity of Nickel Supported Alumina Catalyst for Hydrodeoxygenation of Stearic Acid

The NiMo supported on γ-Al₂O₃ catalysts were synthesized by co incipient wetness impregnation method to conduct hydrodeoxygenation (HDO) of stearic acid (SA) for production of liquid hydrocarbon. The aim of the present work was to investigate the effect of five different composition of xNiyMo (x=mmol/gm of Ni and y= mmol/gm Mo of catalyst) catalyst supported on γ-Al₂O₃ catalysts for HDO of stearic acid. The catalysts were then characterized by various characterization techniques such as BET, TPR, H2 pulse chemisorption and XRD. The Ni and NiMo complexes were found by powder XRD. The incorporation of 1.0 Mo with 3.1 Ni supported on γ-Al2O3 increased significantly conversion of SA compare with 0.0 Mo and 4.1Ni supported on γ-Al2O3 catalyst. So, enhanced the catalytic activity with incorporation of Mo with Ni was due to the formation of NiMo complexes. The catalytic activity was measured in terms of HDO of SA and products selectivity to n-heptadecane and n-octadecane. The compositions of Ni and Mo in NiMo supported on γ-Al2O3 catalysts have strong impact to product selectivity. The conversion of SA was found maximum with 3.1N1.0M supported on γ-Al2O3 while decreasing with increasing the Mo content. C₁₈ alkane was found as the major products over NiMo supported on γ-Al2O3 catalyst. NiMo/ γ-Al2O3 catalyst is highly active for HDO of SA due to the formation of NiMo complexes and also suitable for reaction route which produce C₁₈ as major product.