Physical and Chemical Properties of the Vitrinite Concen-Trates of of the Kuznetsk Basin Coals

Kozlov, A. P.; Zykov, I. Yu.; Dudnikova, Yu. N.; Fedorova, N. I.; Ismagilov, Z. R.

doi:10.26730/1999-4125-2017-4-170-175

Cited by 4 publications

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“…The main parameter for efficient energy storage is needed in the electrode material to develop a porous structure with high adsorption characteristics. For instance, in research work [9] a method of obtaining carbon sorbents from natural oxidized coal of Barzas deposit is presented. The authors show that sorbents obtained from Barzas natural oxidized activated carbon by potassium hydroxide have a developed porous structure and high adsorption characteristics.…”

Section: Nio/с Composites For Energy Storage Systemsmentioning

confidence: 99%

Carbon/NiO Compositional Fibers

Мансуров

Смагулова

Imash³

et al. 2022

Eurasian Chem. Tech. J.

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This article presents the results of the synthesis of carbon-NiO composite fibers. Fibers doped with NiO particles are of practical interest for applications in sensors, energy storage systems, photocatalysts, etc. Four-component initial fibers based on polyacrylonitrile (PAN), activated carbon (AC), coal tar pitch (CTP), and NiO particles were obtained. CTP was obtained by thermal treatment of coal tar, AC by carbonization of apricot kernels, NiO by solution combustion synthesis. PAN, CTP, and AC are a source of carbon, but each of them plays a specific role. PAN is the basis of carbon fibers and a fiber-forming material, CTP is a technogenic waste added to replace polymer particles, AC is an additive that could increase the carbon content and the porosity of the final fibers. The fibers were obtained using the electrospinning method, which makes it possible to use complex suspensions and obtain fibers of various diameters. PAN:CTP:AC:NiO fibers were obtained. Next, the processes of stabilization and carbonization of the fibers were carried out. The fibers at each stage were examined by scanning electron microscopy and EDAX. The result of the synthesis was carbon/NiO fibers with a diameter of 100‒300 nm. The resulting fibers are promising for practical applications due to the one-dimensional structure of the fibers and better adhesion between the fiber and NiO particles.

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Section: Nio/с Composites For Energy Storage Systemsmentioning

confidence: 99%

Carbon/NiO Compositional Fibers

Мансуров

Смагулова

Imash³

et al. 2022

Eurasian Chem. Tech. J.

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Study of the structure and morphology of carbon sorbents

Zykov

Dudnikova

Федорова

et al. 2021

J. Phys.: Conf. Ser.

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The paper presents the results of a study of the morphology of carbon sorbents from Kuzbass coal. Carbon sorbents were obtained by chemical activation of the initial coal with potassium hydroxide at a temperature of 800 °C and a KOH/coal ratio of 1 g/g. It was shown that alkaline activation has no significant effect on the ash content of the obtained carbon sorbents. The elemental composition of the obtained carbon sorbents practically does not differ and remains constant when the elemental composition of the initial coal changes. The morphology of the surface of the initial coal and sorbents was studied by the SEM method, and the different nature of the surface of carbon sorbents based on coal was shown. For carbon sorbents from bituminous coals of low stages of metamorphism, a spongy structure is characteristic, for carbon sorbents from bituminous coals of high stages, it is layered. The physicochemical characteristics of carbon sorbents were determined. A study was carried out for the content of total and water-soluble iron for the amount of water-soluble ash.

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Study of the textural characteristics of carbon sorbents prepared by alkaline activation

Zykov

Dudnikova

Tsvetkov

et al. 2021

J. Phys.: Conf. Ser.

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The paper investigates the textural characteristics of carbon sorbents prepared by alkaline activation of brown coal from the Tisul deposit. The texture characteristics (specific surface area-SBET, m2/g, total pore volume-VΣ, cm3/g, mesopore volume-Vme, cm3/g and volume of micropores-Vmi, cm3/g) of carbon sorbents were measured on an ASAP-2020 analyzer. The production of carbon sorbents was carried out by activating coal impregnated with potassium hydroxide at a KOH/coal (RKOH) ratio of 0.5 g/g; 1 g/g and 2 g/g. The activation of brown coal was carried out at three different temperatures-700 °C, 750 °C and 800 °C. It is shown that the RKOH ratio has a greater effect on the texture characteristics of carbon sorbents, as compared to the effect of the alkaline activation temperature. Alkaline activation at an RKOH ratio of 2 g/g makes it possible to obtain carbon sorbents with the highest values of textural characteristics. High-temperature alkaline activation (800 °C) has a positive effect on the formation of a common pore space of carbon sorbents based on brown coal from the Tisulsky deposit for all studied RKOH.

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Physical and Chemical Properties of the Vitrinite Concen-Trates of of the Kuznetsk Basin Coals

Cited by 4 publications

References 0 publications

Carbon/NiO Compositional Fibers

Carbon/NiO Compositional Fibers

Study of the structure and morphology of carbon sorbents

Study of the textural characteristics of carbon sorbents prepared by alkaline activation

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