Hydrotreating Performance of FCC Diesel and Dibenzothiophene over NiMo Supported Zirconium Modified Al-TUD-1 Catalysts

Abstract

Zr modified mesoporous alumina Al-TUD-1 with different Zr content was successfully synthesized via sol− gel method and the optimal thermal treatment time was 4 h. The characterization results of HRTEM, XPS and pyridine FT-IR revealed that Zr atoms acted as electronic promoters not only enhanced the sulfidation degree and modulated the morphology of MoS 2 active phases but also brought more acidities into the alumina framework. Additionally, the sulfided catalysts were evaluated using dibenzothiophene (DBT) and FCC diesel as feedstocks, respectively. NiMo/ZrAT-100 catalyst with the largest pore size, the highest active metal sulfidities, as well as the highest total acid and B/L value exhibited the highest HDS (99.1%) and HDN efficiencies (98.7%) in diesel hydrotreating reaction; moreover, it possessed the largest reaction rate constant in DBT HDS reaction. Furthermore, a possible reaction network was also proposed, in which DDS route was the predominant pathway for DBT HDS.

Vanadium Phosphorus Oxide/Siliceous Mesostructured Cellular Foams: efficient and selective for sustainable acrylic acid production via condensation route

“…Similarly, the IR bands of 1447 and 1595 cm −1 over pure MCF, 5%-VPO/MCF, and 33%-VPO/MCF are attributable to the L acid sites 50–53 . Notably, only Lewis acid sites essentially exist on the MCF support and this L-type acid site has little contribution to the target reaction 54 . Both B and L acid sites co-exist over 5%-VPO/MCF, 33%-VPO/MCF, and unsupported VPO, but the fraction of B acid sites in the overall acid sites gradually decreases with increasing VPO content.…”

A current overview of the oxidative desulfurization of fuels utilizing heat and solar light: from materials design to catalysis for clean energy

“…As mentioned previously, the resulting fuels undergo a specific downstream purification process to eliminate the oxidized sulfur compounds. In comparison with other desulfurization techniques, the reaction temperature of thermal-driven ODS prevalently stays in the range of 35 to 90 1C, 38 which is much lower than those in the conventional HDS (300-360 1C) [39][40][41] and Fig. 3 Graphical synopsis of the five predominant focal points, including engineering, synthesis, properties, catalytic performance and reaction mechanisms of catalysts, in contributing insights into recent ODS advancements, the structure-activity relationship of catalysts and the challenges and future outlook in thermal and light-driven ODS systems.…”

Restrictive diffusion and hydrodesulfurization reaction of dibenzothiophenes over NiMo/SBA‐15 catalysts

“…Detailed descriptions of different characterization methods, for instance, x‐ray diffraction (XRD), nitrogen physisorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy, were provided in the previous articles 16,17 …”