Refining of Coal Tar by Hydrogenation in the Presence of Nanoheterogeneous Nickel Sulfide Catalyst

Maloletnev, A. S.; Каирбеков, Ж. К.; Smagulova, N. T.

doi:10.3103/s1068364x20050038

Cited by 2 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Oil shales, in turn, differ from coals by comtaining from 8 to 20% of organic substances. They also contain valuable trace elements such as germanium, lanthanum, vanadium, molybdenum and others, the content of which is comparable to that in industrial ores [4,[8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Kinetic Parameters of Thermal Degradation and Hydrodemetallization of a Mixture of the Heavy Fraction of Low-Temperature Coal Tar and Coal Shale

Baikenov,

Izbastenova,

Sarsenbekova

et al. 2024

Energies

View full text Add to dashboard Cite

The laws of thermal degradation of the mixture of the heavy fraction of low-temperature coal tar and coal shale were investigated using dynamic thermogravimetry. The kinetic characteristics of the process were determined using various methods, including the Ozawa–Flynn-Wall, Friedman, non-parametric kinetics and Šesták–Berggren methods. It is shown that coal shale initiated changes in the kinetic parameters and decomposition rate of the heavy fraction of coal tar. It was found that a 13% content of coal shale in the mixture led to the maximum rate of weight loss of the heavy fraction of coal tar. A hydrodemetallization kinetic model of the mixture of the heavy fraction of low-temperature coal tar and coal shale is proposed. The kinetic parameters of the hydrodemetallization process were determined; in addition, the rate constants at various temperatures were estimated. The study shows that the distribution of trace elements in the hydrogenate from the initial mixture and in the hydrogenate from the solid residue was characterized by relatively low values of reaction rate constants. The maximum microelement distribution rate was achieved in the hydrogenate solid residue. Energy indicators of activation processes indicated that hydrodemetallization at low temperatures is advantageous from an energy point of view.

show abstract

Section: Introductionmentioning

confidence: 99%

Determination of the Kinetic Parameters of Thermal Degradation and Hydrodemetallization of a Mixture of the Heavy Fraction of Low-Temperature Coal Tar and Coal Shale

Baikenov,

Izbastenova,

Sarsenbekova

et al. 2024

Energies

View full text Add to dashboard Cite

show abstract

“…Hydrogenation of a mixture of resin and oil distillation residue with the addition of nickel nitrate and elemental sulfur leads to formation of products which are suitable for coke producing with a more ordered structure and yield greater than with the use of industrial catalysts [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nickel Nanopowder on the Thermal Degradation of Coal Tar Distillate

Kim¹,

Байкенов²,

Ibishev³

et al. 2022

Bull. of the Kar. Univ. "Chem". Ser.

View full text Add to dashboard Cite

Regularities of influence of nickel nanpowder on the thermal degradation of coal tar distillate were determined using model-free Kissinger, Flynn-Wall-Ozawa and model-fitting Coats-Redfern methods. Coal tar distillate with a boiling point <350 °C was obtained by simple distillation of primary coal tar from the Shubarkol deposit. Nickel nanopowder was used as a catalyst and was added to coal tar distillate in a quantity of 1 % of the mass of the distillate and then the process of thermal degradation of coal tar distillate was conducted at heating rates 5, 10 and 20 °C/min in an inert gas medium. Nickel powder was obtained by high-voltage discharge impact on the dc electrolysis. X-ray diffraction (XRD) analysis showed that the obtained nickel powder has face-centered cubic structure and the average crystallite size calculated by Scherrer equation was ~ 34 nm. Calculations of activation energy were performed via processing of thermogravimetric data. The Kissinger method showed that the activation energy value decreases from 145.19 kJ/mol to 43.65 kJ/mol, by the Flynn-Wall-Ozawa (FWO) method the value decreases from 152.82 kJ/mol to 51.65 kJ/mol, and by the Coats-Redfern method the value decreases from 143.38 kJ/mol to 52.64 kJ/mol. Applicability of these methods are ensured by the high values of correlation coefficients.

show abstract

Refining of Coal Tar by Hydrogenation in the Presence of Nanoheterogeneous Nickel Sulfide Catalyst

Cited by 2 publications

References 6 publications

Determination of the Kinetic Parameters of Thermal Degradation and Hydrodemetallization of a Mixture of the Heavy Fraction of Low-Temperature Coal Tar and Coal Shale

Determination of the Kinetic Parameters of Thermal Degradation and Hydrodemetallization of a Mixture of the Heavy Fraction of Low-Temperature Coal Tar and Coal Shale

Effect of Nickel Nanopowder on the Thermal Degradation of Coal Tar Distillate

Contact Info

Product

Resources

About