The Development of Metal-Carbon Catalysts for Oxidative Desulfurization of Diesel Fractions

Z.R Ismagilov,A.P Nikitin,S.A Sozinov,O.S Efimova,L.M Khitsova,E.V Matus,A.N Popova

doi:10.18321/ectj954

Abstract

Metal-carbon materials M/CNTs (M = Ce, Сu, Mo) were synthesized by incipient wetness impregnation and their physicochemical characteristics were studied using various methods (inductively coupled plasma optical emission spectrometry, thermal analysis coupled with mass spectrometry, low-temperature nitrogen adsorption, X-ray diffraction and structural analysis, scanning electron microscopy, and Raman spectroscopy). It was found that M/CNTs (M = Ce, Сu, Mo) are the mesoporous materials consisting of carbon nanotubes with deposited СeO2, Сu2O/Cu or МоО3/MoO2 particles, respectively. The dispersion of supported species and their deposition uniformity improve in the series Сu < Се < Мо. The type of metal was shown to affect thermal stability as well as the textural and structural properties of the samples. The thermal stability of materials increases in the series Ce < Cu ≈ Mo, which is caused by different redox properties of the metals and also by the composition of products of the metal precursor decomposition. It is promising to use the developed materials as the catalysts for deep purification of diesel fraction components from sulfur compounds.

Highlights

The necessity to provide ecologically safe and sustainable development of society at a growing consumption of energy resources implies a decrease in discharge of harmful wastes to the environment
The thermal stability of materials increases in the series Ce < Cu ≈ Mo, which is caused by different redox properties of the metals and by the composition of products of the metal precursor decomposition
A series of metal-carbon materials M/carbon nanotubes (CNTs) was synthesized by incipient wetness impregnation with the variation of the type of metal M = Ce, Сu, Mo used for modification of the carbon matrix

Summary

Introduction

The necessity to provide ecologically safe and sustainable development of society at a growing consumption of energy resources implies a decrease in discharge of harmful wastes to the environment. The main industrial method for desulfurization of components of diesel fractions is their catalytic hydrodesulfurization [3, 4] Economical advisability of this method decreases with stiffening of environmental requirements to the fuel quality, which makes it necessary to develop new approaches to the purification of hydrocarbon feedstock. A combination of high adsorption capacity to the substrate and ability to activate the oxidant is a necessary condition for creating the catalytic systems efficient in ODS. It was shown [19] that carbon nanomaterials (CNMs) can serve as the promising materials for ODS.

Experimental

Result and discussion

Conclusion