Determination of the composition of chalcogenid glasses AS<sub>x</sub>SE<sub>1-x</sub> by the method of X-ray fluorescent analysis

Egorova, Alena; Lomakina, E.S.; Popova, A. N.

doi:10.1088/1742-6596/1384/1/012009

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…The experimental part on the quantitative determination of sulfur and microelements in the samples of petroleum coke from decantoil was carried out on a sequential wave-dispersive X-ray fluorescence XRF-1800 Shimadzu spectrometer. The instrument was equipped with an X-ray tube with a Rh anode of 3.6 kW. , The analysis was carried out without preliminary ashing of the samples using the classical addition method (Ca was added in the form of CaCl 2 ). The cathode current was 90 mA, and the tube voltage was 40 kV.…”

Section: Methodsmentioning

confidence: 99%

Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

et al. 2021

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The results of experimental investigations on the coking of decanted heavy gasoil of catalytic cracking with polystyrene in a certain concentration range to obtain petroleum needle coke with the most developed string-base anisotropic structure and a microstructure point of at least 6.2 corresponding to the super-premium grade are presented. Certain regularities have been established to improve the structural quality index of the resulting needle coke from the optimal content of polystyrene in the base raw material, including the extreme dependence of the quality indices of needle coke on the polystyrene content (10 wt %). The decrease in the quality indices of the obtained carbon material is a consequence of uncontrolled changes toward an increase in the system viscosity performance (the viscosity increases 2.7 times). The experimentally obtained coefficient of thermal expansion (CTE) of needle coke-synthesized samples within the temperature range of 40–500 °C showed a reducing trend in CTE depending on the polymer additive proportion in the feedstock; for example, at 300 °C, the CTE decreases to 5.732 × 10–6 °C–1.

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Section: Methodsmentioning

confidence: 99%

Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

et al. 2021

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“…The classic approach to solve this problem is to preburn the sample, then dissolve the residue in a mixture of concentrated acids, and determine the elements using one of the conventional analysis. − This method has two disadvantages. First, sample preparation requires a specially equipped workplace. − Second, many elements (mercury, lead, or sulfur) partially volatilize during combustion. − These problems limit the use of the methods for educational purposes in educational and scientific laboratories . The only method for the rapid and direct detection of elements heavier than sodium without prior destruction of the material is X-ray fluorescence (XRF).…”

Section: Introductionmentioning

confidence: 99%

Quantitative Determination of Trace Heavy Metals and Selected Rock-Forming Elements in Porous Carbon Materials by the X-ray Fluorescence Method

et al. 2021

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A new X-ray fluorescence (XRF) method is proposed for sample preparation and impurity quantification for elements heavier than sodium in carbon materials. The analysis is suitable for various materials including amorphous ones, such as petroleum cokes, with an impurity content higher than 0.01%. We compared a new method with the regular additive method to measure impurities in electrode graphite and petroleum coke. The XRF-based method provides the same sensitivity and accuracy and much greater reproducibility of the analysis results for variations in the sample mass, its density, and coverage by exciting X-ray radiation. The method does not require changes in the instrument software and is easily implemented on commercial analytical equipment.

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“…At the stages of development and exploitation of a land plot with the presence of minerals, the cost approach to assessment is used as the main one, while at the stage of geological study of the subsoil, other methods are also used. Among the most well-known, it is worth highlighting the method of evaluating participation [14,17], as well as the method of geological ranking, or, as it is called in Russian practice, the method of geological and industrial evaluation of deposits [22,23], which includes qualitative and quantitative indicators of valuable components contained in mineral reserves [24,25]. In addition, scientists A.Bieda, E.Wojczak and P.Pazhich used a SWOT/TOWS analysis, which made it possible to identify cost factors, relationships and the degree of their influence on the cost of land with mineral deposits in Poland on a fivepoint Tilgner scale [26].…”

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Development of methodology for economic evaluation of land plots for the extraction and processing of solid minerals

Bykowa

Khaykin

Shabaeva

et al. 2023

PMI

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The Russian economy has a pronounced resource specialization; in many regions, subsoil use is a backbone or one of the main areas of the economy. In these conditions, the improvement of the methodology for the economic evaluation of lands on which mining enterprises are located is of particular relevance. On the basis of the existing experience in assessing industrial land, the authors present a developed methodology for determining the cadastral value of land plots where mining enterprises are located, taking into account their industry characteristics and the specifics of production and commercial activities. At the same time, cadastral valuation is considered as a specific form of economic valuation. Particular emphasis is placed on the importance of taking into account the cost factors that have the greatest impact on the formation of the cost of land for the extraction and processing of solid minerals, and the method of assessment depending on the characteristics of the object. To carry out theoretical research, the methods of analysis and synthesis of legal and scientific and technical literature in the field of cadastral and market valuation of land were used in the work. The practical part is based on the application of expert methods, including the method of analysis of hierarchies, system and logical analysis. The method of M.A.Svitelskaya was chosen as the basis, which presents a combination of modified methods of statistical (regression) modeling and modeling based on specific indicators of cadastral value. The use of this technique in economic practice contributes to increasing the efficiency of cadastral valuation and the objectivity of its results.

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Determination of the composition of chalcogenid glasses AS_xSE_1-x by the method of X-ray fluorescent analysis

Cited by 4 publications

References 9 publications

Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

Quantitative Determination of Trace Heavy Metals and Selected Rock-Forming Elements in Porous Carbon Materials by the X-ray Fluorescence Method

Development of methodology for economic evaluation of land plots for the extraction and processing of solid minerals

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Determination of the composition of chalcogenid glasses ASxSE1-x by the method of X-ray fluorescent analysis

Cited by 4 publications

References 9 publications

Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

Technology of Petroleum Needle Coke Production in Processing of Decantoil with the Use of Polystyrene as a Polymeric Mesogen Additive

Quantitative Determination of Trace Heavy Metals and Selected Rock-Forming Elements in Porous Carbon Materials by the X-ray Fluorescence Method

Development of methodology for economic evaluation of land plots for the extraction and processing of solid minerals

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Determination of the composition of chalcogenid glasses AS_xSE_1-x by the method of X-ray fluorescent analysis