scholarly journals Analysis of Coal for Safe Producing Low Temperature Carbon Products

2018 ◽  
Vol 41 ◽  
pp. 01010
Author(s):  
Andrey Papin ◽  
Alexander Nevedrov ◽  
Elena Vasileva ◽  
Evgeniya Makarevich
Keyword(s):  
Low Temperature ◽  
Adsorption Capacity ◽  
Quality Indicators ◽  
Elemental Analysis ◽  
Coal Sample ◽  
Open Pit ◽  
Coal Quality ◽  
Technical Specifications ◽  
Subsequent Activation ◽  
Feed Coal

Solid products of low temperature carbonization in comparison with coke have the higher reaction and adsorption capacity, are easier to undergo the subsequent activation and gasification. The low temperature coke can also act as a refined smokeless fuel for boiler plants and domestic ovens, an active carbonaceous reductant for the chemical and metallurgical industries. The results of Tugnuisky open pit (Buryatia) coal quality studies are given in this article. The parameters of the technical and elemental analysis of the feed coal were tested during the experiments. The low temperature carbonization of coal sample in retort was carried out to determine the yield of the low temperature carbonization products. The produced products were investigated according to the quality indicators in accordance with the requirements of the technical specifications.

Formation of Pt decorated Ni–Pt nanocubes through low temperature atomic diffusion – time-resolved elemental analysis of nanoparticle formation

Nanoscale ◽  
2015 ◽  
Vol 7 (21) ◽  
pp. 9927-9934 ◽  
Author(s):  
A. Nagao ◽  
K. Higashimine ◽  
J. L. Cuya Huaman ◽  
T. Iwamoto ◽  
T. Matsumoto ◽  
...  
Keyword(s):  
Low Temperature ◽  
Elemental Analysis ◽  
Diffusion Time ◽  
Atomic Diffusion ◽  
Pt Catalysts ◽  
Time Resolved ◽  
Nanoparticle Formation ◽  
The Core ◽  
Temperature Diffusion

Low temperature diffusion of Pt atoms from the core to the corners and edges of the Ni cube results in the preparation of potential novel cage-structured Pt catalysts.

Study on Low-Temperature Oxidation’s Endothermic Character of Coal with Comparative-Oxidation Method

2012 ◽  
Vol 577 ◽  
pp. 39-42
Author(s):  
Chang Lu ◽  
Yuan Qing Liang ◽  
Hui Hui Li
Keyword(s):  
Low Temperature ◽  
Energy Conservation ◽  
Heat Release ◽  
Release Rate ◽  
Coal Sample ◽  
Spontaneous Combustion ◽  
Storage Conditions ◽  
Equation Model ◽  
Oxidation Method ◽  
Temperature Controlled

In this paper air was passed through into one progress temperature-controlled box with coal sample and nitrogen into another as comparison during the procedure of coal’s low-temperature （10～80°C）oxidation . Draw the heating curves and heating rate curve, and equation model is built combined with energy conservation, then concludes the heat release rate of the coal samples in the air conditions. The experimental results show that the condition with air is more close to the storage conditions of coal such as transportation in reality, which is very significant to prevent the spontaneous combustion of coals

scholarly journals Study of the swelling pressure of coals and coal charges in the coking process

2021 ◽  
Vol 303 ◽  
pp. 01053
Author(s):  
Tatiana Cherkasova ◽  
Nikita Krasulin ◽  
Aleksandr Nevedrov ◽  
Andrey Papin ◽  
Sergey Subbotin
Keyword(s):  
Quality Indicators ◽  
Swelling Pressure ◽  
Coke Production ◽  
Coke Furnace ◽  
Coal Quality ◽  
Plastic Properties ◽  
Plant Laboratory ◽  
Factors Affecting ◽  
Central Plant Laboratory ◽  
The Relationship

The maintenance of furnaces is one of the most important problems for by-product coke production. Swelling pressure is one of the least studied factors affecting the lining of coke furnace walls. The results of studies of the swelling pressure of PJSC “Koks” feedstock coal are presented in this paper. Research has been carried out to identify the dependence of the swelling pressure on the coal quality indicators, estimated during the incoming control of the central plant laboratory of PJSC “Koks”. The plastic properties of PJSC “Koks” feedstock coals were studied using Gieseler plastometer. The relationship between the swelling pressure and the maximum coal fluidity is revealed.

A Low Temperature Vaporization of Pb(THD)2 with NH3

1994 ◽  
Vol 361 ◽  
Author(s):  
June Key Lee ◽  
Wan In Lee ◽  
Seshu B. Desu
Keyword(s):  
Molecular Structure ◽  
Thin Films ◽  
Low Temperature ◽  
Elemental Analysis ◽  
Carrier Gas

ABSTRACTPb(THD)2 is one of the most popular CVD precursors for lead. It was found in this study that the volatility of Pb(THD)2 can be considerably improved by using ammonia as a carrier gas. An adduct between Pb(THD)2 and NH3 is generated in-situ, when the NH3 carrier gas is passed through the bubbler containing Pb(THD)2. The ammoniated precursor was isolated and its molecular structure was characterized by elemental analysis, infrared and NM.R. PbO thin films could be prepared with this precursor system while maintaining the bubbler temperature at 110° C, which is considerably lower than the temperature used with the Pb(THD)2 precursor in the commonly used carrier gas.

AVAILABLE ELGIN COAL DEPOSIT COAL QUALITY INDICATORS ASSESSMENT

Ugol ◽  
2016 ◽  
pp. 72-77
Author(s):  
N.N. Grib ◽  
◽  
P.Yu. Kuznetsov ◽  
Keyword(s):  
Quality Indicators ◽  
Coal Deposit ◽  
Coal Quality

Low Temperature Selective Catalytic Reduction of NO on CeO2-Fe3O4/TiO2,CeO2 /TiO2 Catalysts Prepared by Coprecipitation Method

2014 ◽  
Vol 960-961 ◽  
pp. 234-239 ◽  
Author(s):  
Wen Long Zhen ◽  
Rui Tang Guo ◽  
Wei Guo Pan
Keyword(s):  
Low Temperature ◽  
Adsorption Capacity ◽  
Selective Catalytic Reduction ◽  
Surface Area ◽  
Catalytic Reduction ◽  
Coprecipitation Method ◽  
High Concentration ◽  
Excellent Performance ◽  
Reduction Of No ◽  
Chemisorbed Oxygen

CeO2-Fe3O4/TiO2and CeO2/TiO2catalysts were prepared by coprecipitation method, and their activities for selective catalytic reduction of NO with NH3were investigated. As can be seen from the experimental results, the CeO2-Fe3O4/TiO2catalyst prepared showed the best SCR activity and SO2resistance. Based on the characterization results of BET, XRD, NH3-TPD and XPS the excellent performance of CeO2-Fe3O4/TiO2catalyst should be resulted from its large surface area, high NH3adsorption capacity and high concentration of surface chemisorbed oxygen.

scholarly journals Development of new compositions for dust control in the mining and mineral transportation industry

2021 ◽  
Vol 248 ◽  
pp. 272-280
Author(s):  
Natalya Kondrasheva ◽  
Elizaveta Kireeva ◽  
Olga Zyryanova
Keyword(s):  
Aqueous Solution ◽  
Low Temperature ◽  
Dust Control ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Adhesion Properties ◽  
Theoretical Part ◽  
Heavy Oil Residues ◽  
Alkyd Oligomer

Dust control in summer and winter periods is a topical problem associated with conducting open pit mining operations; however, at negative temperatures the additional requirements are imposed on dust suppressants. Preventive compositions are proposed, in which light and heavy gas oils, obtained from catalytic cracking and delayed coking, are used as base components. Involvement of heavy fractions allows to increase the flash point, thereby reducing the flammability of dust suppressant, improve its adhesion properties by increasing the content of polyaromatic hydrocarbons and reduce the cost of the final product. In order to improve low-temperature and adsorption properties of developed dust suppressants, heavy oil residues (cracking residue and tar) are included in their composition in various concentrations: 2-10 wt.%. Alternative compositions of dust suppressants, obtained by water emulsification of vinylated alkyd oligomer, are developed; the ability of this dispersion to form strong films on dusty surfaces is examined. The efficiency of using aqueous solution of vinylated alkyd oligomer as a summer dust suppressant is demonstrated. The results of this study include the development of new preventive compositions with improved low-temperature properties and confirmation of the theoretical part of the study by the results of performance tests on a laboratory facility.Alternative compositions of dust suppressors have been developed, which were obtained by emulsifying a vinyl alkyd oligomer (VAO) in water; the ability of this dispersion to form strong films on dusty surfaces has been studied. The efficiency of using an aqueous solution of vinyl alkyd oligomer in the summer period as a dust suppressant is shown. The results of this study are the development of new prophylactic formulations with improved low-temperature properties and confirmation of the theoretical part of the study by the results of tests of operational characteristics in a laboratory facility.

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