Development of briquetting in the Republic Sakha (Yakutia)

Moskalenko, T. V.; Mikheev, V. A.; Vorsina, E.V.

doi:10.25018/0236-1493-2018-7-39-3-11

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…), we take as a basis the humic acids yield according to GOST (Russian National Standard) 9517-94. Correspondingly, efficiency of reagents use and effects shows increase (or decrease) of indicator of humic acids yield after influences in comparison with the value defined in accordance with the above GOST [6,7]. It allows to estimate productivity growth when introducing these methods in manufacturing, to use resources more economically and effectively, to estimate a recoupment of expenses for technology change.…”

Section: Methodsmentioning

confidence: 97%

Intensification of humic acid extraction from lignites

2020

View full text Add to dashboard Cite

One of the methods of initial properties of solid fuels changing by their organic mass oxidation is considered in the paper. Creation of innovative ways of intensification of existing solid fuels processing and their adoption by industry has always been and remains an actual task. Thus the chemical process is the most important stage of raw materials processing into target products. Chemical exposure allows to optimize the technological mode, expanding the scope of control of technological process parameters and, to a certain extent, modify the properties of the resulting products. The article presents the results of experimental research of influence of preliminary oxidation on the lignite organic mass from Kharanorsk and Kangalas deposits by different chemical reagents to determine a degree of this process impact on the efficiency of their processing into humic substances. Inorganic and organic oxidizers of different concentrations were used as reagents. The greatest effect for increasing the humic acids yield was observed when using 6-10 % hydrogen peroxide for oxidation, and 10 % hydrochloric acid. The results of experiments on the coal preoxidation effect can be used as a basis for the development of a new method of lignites processing into humic substances.

show abstract

Section: Methodsmentioning

confidence: 97%

Intensification of humic acid extraction from lignites

2020

View full text Add to dashboard Cite

show abstract

“…Analysis of publications and studies in this direction [1][2] show that the role of cohesion and adhesion is quite large in coal processing technologies. Adhesion is a molecular attraction between the surfaces of two dissimilar condensed phases, cohesion is the adhesion of homogeneous molecules, atoms or ions, which includes all types of intermolecular and interatomic attraction within one phase.…”

Section: Introductionmentioning

confidence: 99%

Method for the calculation of total dipole moment for organic mass of brown and hard coals

Moskalenko

Mikheev

Vorsina

2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

The article considers the study of the patterns of changes in the properties of coals in the metamorphism series and the identification of structural and chemical parameters that allow not only to correctly describe them, but also to use them as an express method of assessment. It is known that physical processes such as adhesion and cohesion play an important role in the processes of coal processing, since the adhesion of dissimilar or homogeneous particles brought into contact is due to intermolecular interaction. Determination of adhesive and cohesive properties of various substances, including solid fossil fuels, is not standardized in hardware. The total dipole moment is one of the indicators characterizing the intermolecular interaction. A method for calculating the total dipole moment based on an additive approach is presented. The calculated values of the total dipole moment of the organic mass of solid fossil fuels in the series “brown coal - hard coal - anthracite” showed a high correlation with the reflectance of vitrinite. As a result of mathematical data processing, equations were obtained for calculating the total dipole moment for brown and hard coals. The application of the equations obtained based on statistical processing of a large database and the calculation according to the proposed method can be used in calculating the parameters of such coal processing processes as briquetting, extraction, flotation, etc.

show abstract

“…In the work of T.V. Moskalenko et al [23], a comparative analysis of the yield of humic acids extracted from peat was carried out with and without magnetic and ultrasonic exposure.…”

Section: Introductionmentioning

confidence: 99%

“…Carbon dioxide (CO2) is widely used as an environmentally friendly lipid extraction solvent [23]. The solubility and selectivity of supercritical carbon dioxide depends on the variation of the extraction parameters such as temperature, pressure, and flow rate of CO2 (supercritical point 7.4 MPa and 31.1° C).…”

Section: Introductionmentioning

confidence: 99%

Influence of extraction conditions on the recovery lipids extracted from the dry biomass of duckweed Lemna minor

et al. 2018

View full text Add to dashboard Cite

Previous studies on the composition of lipid content of higher aquatic plants can be found in the literature. The present work aims to study the effect of various solvent extraction systems on the recovery of lipids extracted from the dry biomass of Lemna minor, using the same polar solvent (ethanol) and variating the non-polar solvent as follow: methanol-ethanol, chloroform-ethanol, hexane-ethanol, diethyl ether-ethanol, petroleum ether-ethanol at different volume ratio. The goal is to select a Sohxlet extraction method that shortens the extraction duration and increases the lipid recovery using various solvents. To intensify the extraction process, homogenization was used as a cell disruption method. It is shown that the yield of total lipids is increased by using homogenization from 4.6% to 6.0%. When studying the influence of the solvent system, the highest yield of total lipids was obtained by using hexane-ethanol with a volume ration of 1:1 (8.0% total lipids by dry mass). The yield of lipids recovered from dry biomass of Lemna minor increases by increasing the extraction time. The optimum extraction time was found to be no more than 300 minutes. The composition of the lipid fraction is mainly represented by sterols, fatty acids and triglycerides.

show abstract

Development of briquetting in the Republic Sakha (Yakutia)

Cited by 3 publications

References 0 publications

Intensification of humic acid extraction from lignites

Intensification of humic acid extraction from lignites

Method for the calculation of total dipole moment for organic mass of brown and hard coals

Influence of extraction conditions on the recovery lipids extracted from the dry biomass of duckweed Lemna minor

Contact Info

Product

Resources

About