Kinetics of Reductive Alkylation of Aniline with Acetone Using a Ni/Organoclay Catalyst

The kinetic model for reductive alkylation of aniline with acetone using 30 wt % Ni/Organoclay was derived and validated at different temperatures. The catalyst was synthesized and characterized for structural and morphological properties, showcasing promising potential in organic synthesis due to the synergistic effects of nickel on organoclay. As per our knowledge, no one reported the reductive alkylation of aniline using Ni/Organoclay. Additionally, very few articles are reported on the kinetic modeling of this reaction. To address this gap, we have investigated the kinetics of reductive alkylation of aniline with acetone using a Ni/Organoclay catalyst. The study systematically investigates the influence of various reaction parameters, such as temperature, pressure, catalyst screening, concentration of the catalyst, mole ratio, agitation speed, and reactant concentrations, on the reaction kinetics. The kinetic analysis involves the determination of crucial parameters, such as reaction rate, activation energies, and heat of adsorption. A number of rate equations were derived to fit the batch reactor data, and rate models based on Langmuir–Hinshelwood competitive associative adsorption of the surface reaction between the Schiff base and hydrogen as the rate-limiting catalytic steps were found to represent the experimental data

High Efficiency Conversion of Glycerol to 1,3-Propanediol Using a Novel Platinum–Tungsten Catalyst Supported on SBA-15

The hydrogenolysis of glycerol to 1,3-propanediol was conducted over a series of Pt-WO₃/SBA-15 catalysts with Pt content ranging from 0.5 to 3 wt % and W content of 10 wt % in vapor phase under atmospheric pressure for the first time. The catalysts prepared via sequential impregnation method were systematically characterized using XRD, NH₃-TPD, Py-IR, CO chemisorption, TPR, TEM, and surface area measurements. The catalysts exhibited unprecedented activity for selective formation of 1,3-propanediol via hydrogenolysis of glycerol. The effect of various reaction parameters such as catalyst loading, reaction temperature, hydrogen flow rate, glycerol concentration and reaction time were studied. The optimized reaction conditions showed that a high glycerol conversion (86%) and 1,3-propanediol selectivity (42%) was obtained over 2Pt-10WO₃/SBA-15 catalyst illustrating the potential of SBA-15 supported platinum–tungsten catalyst to be highly active and efficient. The Brønsted acid sites of the catalyst formed due to addition of WO₃ enhanced selective formation of 1,3-propanediol

Platinum Supported on H‑Mordenite: A Highly Efficient Catalyst for Selective Hydrogenolysis of Glycerol to 1,3-Propanediol

The selective production of 1,3-propanediol from glycerol under mild reaction conditions is of high interest. The current work describes the use of a highly selective catalyst consisting of platinum supported on mordenite zeolite employed for the first time for vapor phase hydrogenolysis of glycerol to 1,3-propanediol under atmospheric pressure. The catalysts with varying Pt content (0.5–3 wt %) were prepared and thoroughly characterized by X-ray diffraction, temperature-programmed desorption of ammonia, FT-IR of adsorbed pyridine, CO chemisorptions, transmission electron microscopy, X-ray photoelectron spectroscopy, and BET surface area. The influence of reaction parameters has been studied to unveil the optimized reaction conditions. A high 1,3-propanediol selectivity (48.6%) was obtained over a 2 wt % Pt/H–mordenite catalyst at 94.9% glycerol conversion. According to the results obtained, the selectivity to 1,3-propanediol is better influenced by Pt dispersion and Brønsted acidity of the support. A plausible reaction mechanism has been presented. The spent catalyst exhibited consistent activity and selectivity toward the desired product during the glycerol hydrogenolysis reaction