Atomization behavior of composite liquid fuels based on typical coal processing wastes

2022 ◽  
Vol 225 ◽  
pp. 107037
Author(s):  
G.V. Kuznetsov ◽  
P.A. Strizhak ◽  
T.R. Valiullin ◽  
R.S. Volkov
Keyword(s):  
Liquid Fuels ◽  
Coal Processing ◽  
Processing Wastes

scholarly journals Environmental advantages of composite fuels based on industrial wastes and different ranks of coal

2018 ◽  
Vol 209 ◽  
pp. 00013
Author(s):  
Galina Nyashina
Keyword(s):  
Power Plants ◽  
Coal Dust ◽  
Thermal Power ◽  
Energy Performance ◽  
Power Industry ◽  
Industrial Wastes ◽  
Liquid Fuels ◽  
Anthropogenic Emissions ◽  
Oil Processing ◽  
Processing Wastes

Thermal power plants and boiler units generate most of the anthropogenic emissions around the world. A promising solution to many problems that heat and power industry is facing today would be switching from conventional coal dust combustion to composite liquid fuels (CLF). These are also known as coal-water slurries containing petrochemicals (CWSP). Here, we perform an experimental study of the most hazardous anthropogenic emissions (sulfur and nitrogen oxides) from the combustion of high-potential CWSP. We identify the main benefits and potential drawbacks of using CWSP in heat and power industry. A set of components and additives to CWSP are explored that significantly affect the environmental and energy performance of fuels. The anthropogenic emissions from the combustion of CWSP made of widespread coal and oil processing wastes are no higher than those from coal dust combustion. Using specialized additives to CWSP, we can change the concentrations of NOx and SOx several times. The most appealing additives to CWSP are sawdust, straw, charcoal, limestone, and glycerol.

Emissions in the combustion of coal and coal-processing wastes

2017 ◽  
Vol 60 (4) ◽  
pp. 171-176 ◽  
Author(s):  
G. S. Nyashina ◽  
N. E. Shlegel ◽  
P. A. Strizhak
Keyword(s):  
Coal Processing ◽  
Processing Wastes

scholarly journals Compositional Fibers Based on Coal Tar Mesophase Pitch Obtained by Electrospinning Method

2021 ◽  
Vol 15 (3) ◽  
pp. 403-407
Author(s):  
Aldan Imangazy ◽  
◽  
Gaukhar Smagulova ◽  
Bayan Kaidar ◽  
Zulkhair Mansurov ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Carbon Fibers ◽  
Coal Tar ◽  
Complete Removal ◽  
Mesophase Pitch ◽  
Coal Processing ◽  
Mesophase Formation ◽  
Electrospinning Method ◽  
Processing Wastes ◽  
Sulfur Containing

This research examines the use of coal-processing wastes of Shubarkol deposit (Kazakhstan) in obtaining useful materials such as carbon fibers. For our experiments, mesophase pitch was obtained by coal tar heat treatment at 773 K. Spinnable solution was prepared by crushing mesophase pitch into the pieces with adding poly(methylmethacrylate) as a fiber-forming material and 1,2-dichloroethane as a solvent. Elemental analysis revealed that the chemical composition of mesophase pitch (С – 91.48 %; О – 8.52 %; S – 0.00 %) showed that heat treatment up to 773 K leads to the complete removal of sulfur-containing components which affect the mesophase formation. Raman data of the obtained pitch revealed the appearance of D (1366 cm-1) and G (1605 cm-1) peaks, which are responsible for carbon materials; another peak at 2900 cm-1 shows the presence of C–H bonds. Carbon fibers with the diameter of 0.8–1.75 μm were obtained by electrospinning method in laboratory settings.

Ignition of coal-water fuels made of coal processing wastes and different oils

2018 ◽  
Vol 128 ◽  
pp. 235-243 ◽  
Author(s):  
K.Yu. Vershinina ◽  
D.A. Lapin ◽  
S.Yu. Lyrschikov ◽  
S.A. Shevyrev
Keyword(s):  
Coal Processing ◽  
Processing Wastes

scholarly journals OBTAINING CARBON FIBERS BASED ON COAL TAR BY ELECTROSPINNING METHOD

2021 ◽  
Vol 73 (1) ◽  
pp. 151-159
Author(s):  
A.M. IMANGAZY ◽  
◽  
B. KAIDAR ◽  
Keyword(s):  
Heat Treatment ◽  
Carbon Fibers ◽  
Coal Tar ◽  
Average Diameter ◽  
Mesophase Pitch ◽  
Coal Processing ◽  
Electrospinning Technique ◽  
Electrospinning Method ◽  
Processing Wastes ◽  
Sulfur Containing

This research discusses the use of coal-processing wastes of the Shubarkol Deposit (Karaganda region, Kazakhstan) to produce valuable materials such as carbon fibers. Annually «Shubarkol Komir» JSC alone produces up to 35,000 tons of coal tar as byproduct. In this experiment, mesophase pitch was obtained by coal tar heat treatment at 200 o C. By cracking mesophase pitch into the pieces with the addition of poly (methyl methacrylate) as fiber-forming material and 1,2-dichloroethane as solvent, the spinnable solution was prepared. The elemental analysis of the mesophase pitch showed that the heat treatment up to 200 o C does not contribute to the full elimination of sulfur containing components that influence the forming of mesophase. From the Raman spectra of the pitch, the D peak appearance at ~ 1370 cm-1 and G peak at ~ 1600 cm-1 responsible for carbon products. Carbon fibers with an average diameter of 2.5-3.3 μm were obtained by electrospinning technique in laboratory settings.

scholarly journals Rheological properties of coal water slurries containing petrochemicals

2019 ◽  
Vol 23 (5 Part B) ◽  
pp. 2939-2949 ◽  
Author(s):  
Dmitrii Glushkov ◽  
Sergey Lyrschikov ◽  
Sergey Shevyrev ◽  
Olga Yashutina
Keyword(s):  
Shear Stress ◽  
Rheological Properties ◽  
Storage Time ◽  
Energy Performance ◽  
Coal Preparation ◽  
Coal Processing ◽  
Processing Wastes ◽  
Wetting Agents ◽  
Main Components ◽  
Filter Cakes

In this paper, the rheological properties (viscosity, shear stress, and lamination) of the promising coal-water slurries containing petrochemicals based on filter cakes have been investigated experimentally. The latter are a mixture of water and solid organic wastes produced during coal preparation. It was established that the rheological properties of coal-water slurries containing petrochemicals depend on concentrations and properties of the main components (liquid and solid, flammable, and non-flammable), wetting agents (plasticizers), as well as the storage time and conditions. The rheological properties of the fuel slurries under study were compared with the known properties of coal-water slurries based on different ranks of coal and found to match or even surpass them. Coal processing wastes have high potential as prospective components of coal-water slurries containing petrochemicals in terms of not only their environmental, economic and energy performance but also their rheological properties.

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