Creating a Composite Material Based on Carbon Nanotubes and Its Use in the Oxidative Desulphurization of Oil Products
N. S. KOBOTAEVA, T. S. SKOROKHODOVA
Institute of Petroleum Chemistry, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
Keywords: carbon nanotubes, fuel oil, oxidative desulphurization, transition metals, nickel, cobalt, metal reduction from solutions of their salts
Pages: 130-137
Abstract
A composite material is manufactured on the basis of multiwalled carbon nanotubes (MWCNT) activated with nickel and cobalt. Its physicochemical and catalytic properties are investigated in the oxidation of sulphur-containing compounds (SC) of fuel oil with hydrogen peroxide. It is demonstrated by means of X-ray phase analysis and transmission electron microscopy that the material is composed of MWCNT phase and the phases of introduced metals (Ni and Со), with nanostructure represented by thin sheets 20 × 30 nm in size. The optimal conditions for the oxidation of sulphur-containing compounds of fuel oil were revealed: temperature, 50-60 °C; process duration, 90 min; catalyst content, 1.0-1.3 mass %; the ratio of sulphur in the raw material to the oxidizer was equal to 1 : 4. It was established that the most efficient system for the extraction of oxidized sulphur-containing compounds from fuel oil is dimethylformamide - water (10 vol. %) system. Under these conditions, it is possible to achieve a degree of sulphur removal of more than 75 %.
DOI: 10.15372/CSD2021286
|
