H3PW12O40/mpg-C3N4 as an efficient and reusable bifunctional catalyst in one-pot oxidation–Knoevenagel condensation tandem reaction

A single-site bifunctional catalyst for oxidation–Knoevenagel condensation tandem reaction was prepared by immobilizing H₃PW₁₂O₄₀ on mpg-C₃N₄via electrostatic interaction.

A Non-sulfided flower-like Ni-PTA Catalyst that Enhances the Hydrotreatment Efficiency of Plant Oil to Produce Green Diesel

The development of a novel non-sulfided catalyst with high activity for the hydrotreatment processing of plant oils, is of high interest as a way to improve the efficient production of renewable diesel. To attempt to develop such a catalyst, we first synthesized a high activity flower-like Ni-PTA catalyst used in the hydrotreatment processes of plant oils. The obtained catalyst was characterized with SEM, EDX, HRTEM, BET, XRD, H₂-TPR, XPS and TGA. A probable formation mechanism of flower-like Ni(OH)₂ is proposed on the basis of a range of contrasting experiments. The results of GC showed that the conversion yield of Jatropha oil was 98.95%, and the selectivity of C11-C18 alkanes was 70.93% at 360 °C, 3 MPa, and 15 h⁻¹. The activity of this flower-like Ni-PTA catalyst was more than 15 times higher than those of the conventional Ni-PTA/Al₂O₃ catalysts. Additionally, the flower-like Ni-PTA catalyst exhibited good stability during the process of plant oil hydrotreatment.