Preparation of Keggin-type monosubstituted polyoxometalate ionic liquid catalysts and their application in catalyzing the coupling reaction of ethylene carbonate and dimethyl succinate to synthesize poly(ethylene succinate)

A series of Keggin-type monosubstituted polyoxometalate-ionic liquids catalysts (POM-ILs) were synthesized. The chemical structure, crystal structure, catalyst morphology, elemental and thermal stability properties of POM-ILs were characterized and analyzed. And...

NiO-PTA supported on ZIF-8 as a highly effective catalyst for hydrocracking of Jatropha oil

Nickel oxide (NiO) and phosphotungstic acid (PTA) supported on a ZIF-8 (NiO-PTA/ZIF-8) catalyst was first synthesized and it showed high activity and good selectivity for the hydrocracking of Jatropha oil. The catalyst was characterized by SEM, SEM-EDS, TEM, N₂ adsorption, FT-IR, XRD and XPS. Compared with the NiO-PTA/Al₂O₃ catalyst, the selectivity of C15-C18 hydrocarbon increased over 36%, and catalytic efficiency increased 10 times over the NiO-PTA/ZIF-8 catalyst. The prepared NiO-PTA/ZIF-8 catalyst was stable for a reaction time of 104 h and the kinetic behavior was also analyzed. This catalyst was found to bypass the presulfurization process, showing promise as an alternative to sulfided catalysts for green diesel production.

Preparation and catalytic performance of a novel highly dispersed bifunctional catalyst Pt@Fe-MCM-41

A novel bifunctional catalyst Pt@Fe-MCM-41 containing highly dispersed metal and acid active sites was successfully synthesized and had excellent catalytic performance.