Nanocatalysts: Effect of Active-phase and Promoter on Catalytic Properties and Performance in the Hydrodesulfurization Reaction

Abstract

nanocatalysts was examined in hydrodesulfurization of thiophene. The nanocatalysts were synthesized via sonochemical technique. The prepared samples were characterized by XRD, FE-SEM, BET, and FTIR analysis. The catalytic activity in hydrodesulfurization reaction was investigated in a batch stirred slurry reactor at 160 • C and atmospheric pressure. The characterizations confirmed highly dispersion of active phase and formation of amorphous AlPO 4 species on the support surface. The results obtained from thiophene hydrodesulfurization showed the nanocatalysts contained 1 wt% of phosphorus had the highest activity. The CoMoP/Al 2 O 3 and NiMoP/Al 2 O 3 nanocatalysts with optimum phosphorus loading nearly gave 100% conversion of thiophene, so that the sulfur compound concentration in final solution was less than 50 ppm.

Preparation and hydrodesulfurization properties of cobalt–molybdenum–phosphorous catalysts for removal of dibenzothiophene

“…As is well known to everyone, sulfur species in fuels not only lead to acidic rain but also affect the efficiency of catalytic converters in cars. [2]. To date, hydrodesulfurization (HDS) technique is one of the best conventional methods for removal of sulfur compounds, because of its high efficiency and low environmental pollution [3].…”

Facile fabrication, characterization and catalytic activity of a NiMo/Al2O3 nanocatalyst via a solution combustion method used in a low temperature hydrodesulfurization process: the effect of fuel to oxidant ratio

“…However, several methods such as precipitation, sol-gel, chemical vapor deposition, sonochemical and hydrothermal deposition have been applied in the last decades. 16,20,[25][26][27][28][29] Although the abovementioned preparation methods have had the opportunity to produce advanced hydrodesulfurization catalysts, they suffer from some drawbacks. Some of these disadvantages are relatively complicated equipment, prolonged synthesis time, multistage process, high-energy consumption, poor control of physicochemical properties, need subsequent milling process, expensive starting substance and environmental concerns.…”