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

Abstract

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.

Ultra‐small and highly dispersed Pd nanoparticles inside the pores of ZIF‐8: Sustainable approach to waste‐minimized Mizoroki–Heck cross‐coupling reaction based on reusable heterogeneous catalyst

“…Nitrogen adsorption–desorption isotherms of pure ZIF‐8 typically were of type I (Figure a), which is characteristic of a microporous structure. The Pd NPs@NHC@ZIF‐8 catalyst displayed typical type IV isotherm with a type H4 hysteresis loop, indicating a mesoporous framework (Figure b) . Table presents the BET surface area, total pore volume and Barrett–Joyner–Halenda (BJH) pore diameter of synthesized Pd NPs@NHC@ZIF‐8 nanocomposite which were found to be 1451 m 2 g −1 , 0.89 cm 3 g −1 and 2.42 cm 3 g −1 , respectively.…”

Metal–polydopamine frameworks and their transformation to hollow metal/N-doped carbon particles

“…52 The band at 1590 cm −1 in ZIF-67 could be assigned to the CvN stretching mode which disappears in Z67D. 53 The absorption band at 420 cm −1 originating from the Co-N stretching mode in ZIF-67 disappears in Z67D, demonstrating that Co disaggregates with 2-mim.…”

PVA assisted ZnO based mesoporous ternary metal oxides nanomaterials: synthesis, optimization, and evaluation of antibacterial activity

“…The pore size distribution of porous NPs that indicates the presence of different types of pores was expressed in terms of the Barrett-Joyner-Halenda (BJH) curve. As seen in figure 7(c) inset BJH plots, the composite shows 20-40 nm pore size distributions, indicating the mesoporous textural properties of the materials[39].…”