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Coal is primarily used as fuel to generate electric power in the United States. In coal-fired power plants, bituminous coal, subbituminous coal, or lignite is burned. The heat …
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In this work, zeolite based on coal fly ash was firstly synthesized via wet milling for the adsorption of lead (Pb(II)). The effects of contact time, solid-to-liquid ratio and initial pH of solution on Pb(II) removal were investigated in detail. The experimental data showed that synthesized zeolite …
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P-Nitrophenol (4-NP) is a high toxicity material and has harmful effects on the environment. Thus, the analysis of 4-NP is an important topic at present. In this work, the fabrication of a novel electrochemical sensor based on coal-liquefaction-residue (CLR)-derived porous carbon (PC) materials. CLR-based porous carbon material was prepared …
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[1] Zhi L and Jian L 2012 Application research of ERP in coal enterprises based on data miningtechnology J. Coal Technology 2 183-185 Google Scholar [2] Wei X, Yanmin X and Jinhu N 2012 The application of data mining technology in the reverselogistics management in coal enterprises J. Coal Technology 10 45-46 Google Scholar [3] Tao S …
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For a coal-fired boiler, there is a substantial amount of heat that can be recovered from the FGD outlet flue gas. This paper proposed a new coal-fired flue gas heat recovery system. The system was applied at the Jinan-Beijiao cogeneration power plant (China). Based on the measured operating data, the plant performance was …
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Coal is a key energy fuel in the production of aluminium a non-ferrous metal known for its lightweight properties and widely used in cars, trains, and airplanes to reduce the weight …
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Based on the practical application scenarios of coal washing plants, a coal gangue sorting system capable of accurately identifying and sorting coal gangue with particle sizes ranging from 50 to ...
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Based on the chemical and mineralogical composition, fly ash is commonly classified as Class F or Class C [82].Class F fly ash is characterized by a total Si 2 O 3, Fe 2 O 3, and Al 2 O 3 content greater than 70% and a CaO content less than 5%; the percentage of unburned carbon is generally high at ≥6.0% and up to 12%. Class F ash …
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Coal is a black or brownish-black sedimentary rock that can be burned for fuel and used to generate electricity.It is composed mostly of carbon and hydrocarbons, …
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In 2022, coal accounted for about 19.5% of U.S. electricity generation. Coal use by industry. Many industries use coal and coal byproducts. The concrete and paper industries burn large amounts of coal to produce heat. The steel industry uses coal indirectly as coal coke to smelt iron ore into iron to make steel. The high temperatures created by ...
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Deep processing and functional applications of coal are important strategies to overcome the bottleneck of current coal applications. In recent years, the fluorescent carbon dots (CDs), a new member of the carbon nanomaterials family, have shown great application prospects in biological imaging, chemical sensing and photocatalysis owing …
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Coal is a non-clastic sedimentary rock. They are the fossilized remains of plants and are in flammable black and brownish-black tones. ... iron is then used to …
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Coal combustion by-products (CCBs), including boiler slag, bottom ash, fly ash and flue gas desulphurisation (FGD) material, are solid residues that remain after the burning of coal (Kalyoncu and Olson, 2001, Scheetz and Earle, 1998).The global production of CCBs in 1992 was 459 million tonnes with China as the largest producer …
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Application of coal seam grouting to prevent and extinguish fire technology in Fusheng Coal Mine. Mingming Zhang 1,2. ... In order to prevent spontaneous combustion of coal seams, it is proposed to use grouting to prevent fire extinguishing technology, mainly through the design of grouting system, the selection of grouting materials, the ...
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Nevertheless, researches on the application of coal gangue in asphalt is still limited and should be further investigated to promote the recycling of this environmental pollutant. Fatigue crack is a common defect that occurs on asphalt pavements, which will deteriorate the pavements service quality(Lei et al., 2019).
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The total amount of carbon in the Earth crust has been estimated to be about 2.65 × 10 20 g (Hunt 1977) of this, almost 82% of the carbon is in the form of carbonates in limestone and dolomites.And just 18% occurs as organic carbon in the form of coal oil and gas (Schidlowski et al. 1974).The process of formation of hydrocarbon resources starts …
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Cement soil stabilization is a commonly used method to improve in-situ soil properties catering to different geotechnical applications. However, cement manufacturing is typically associated with high CO 2 emissions and energy consumption. Coal char is a sustainable and environmentally friendly material derived from the coal pyrolysis process.
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altered coal and caused fast carbonication-aromatization of coal and the formation of new minerals, in some cases with high concentrations of potentially toxic trace elements. The aim of eld exploration is to determine the loca-tion and lithology of coal seams and associated rocks in coal-bearing sequences, as well as the structural features,
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It is the intent of this course to deal with the very broad aspects of coal petrology. In the process of doing this, the authors intend to point out many of the areas in which the science has been applied to geological and various production problems and also to suggest some areas where future work may be of value.
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Purpose The massive mining of ion-adsorption-type rare earth ore has led to a series of problems such as soil acidification, land degradation, and water pollution, and thus, an effective method of treating rare earth tailings is urgently needed. The goal of this study was to explore the rehabilitation effect of the combined application of bamboo …
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1. Introduction. Coal gasification slag (CGS) is a solid waste discharged from the coal gasification process [1].Depending on different discharge processes, CGS is mainly classified into coarse slag (furnace bottom slag with grain sizes of 3.75–9.00 mm) and fine slag (less than 50 μm) [2].Approximately 0.15–0.2 tons of CGS are emitted for …
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Sub-bituminous coal has applications in power generation and also in industrial processes. This type of coal makes up 30 percent of the world's coal reserves. Hard coals. Bituminous coal is harder and …
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1. Introduction. Thermal power technology in China is constantly evolving. Currently, 300 MW thermal power generating units, especially units using lean coal, are facing tough competition and peak regulation [1], [2], [3].Although several coal-fired generating units with larger capacity and higher efficiency parameters have been built, …
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Macroscopic charcoal in coal was named as fusain and belongs to one of the macrolithotypes of coal (Fig. 1 N; Stach et al., 1982). Fusain appears as lenses or layers in coal seams. Microscopic charcoal in coal was named as inertinite and belongs to one of the maceral types of coal under microscope (ICCP, 1963, ICCP, 2001).
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Abstract. Modern hydraulic fracture treatments rely heavily on the implementation of formation property details such as in-situ stresses and rock mechanical properties, in order to optimize stimulation designs for specific reservoir targets. Log derived strain and strength calibrated in-situ properties provide critical description of stress …
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Industrial application of ammonia–coal co-firing. In a 600-MW unit of a pulverized coal-fired boiler, a 5 % uptick in NH 3 content per calorific fraction within the fuel can lead to a 24.08-ton per hour decrease in CO 2 emissions.
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The recognition of coal–rock interface is very crucial for research in the intelligent production of coal mines. To this end, the study investigated the application of terahertz time-domain spectroscopy in the recognition of coal–rock interface, including the identification of coal–rock and coal–rock mixtures, as well as the accurate …
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The application of coal slag in energy storage systems has multiple benefits (Henry and Prasher, 2014, Calvet et al., 2013, Ortega-Fernández et al., 2015). First, recycling waste reduces the costs of TES systems and electricity generation. Second, using recycled materials rather than new raw materials (other sand and rocks) avoids the ...
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Coal is the primary energy resource in China (Dmitrienko, Nyashina, and Strizhak 2018; He et al. 2018). China's raw coal output was 3.41 billion tons in 2016. ... Application of novel flotation systems to fine coal cleaning. Gan Cheng College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan …
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Metal production, and especially iron ore-based steel production, is characterized by high fossil CO2 emissions due of the use of coal and coke in the blast furnace. Steel companies around the world are striving to reduce the CO2 emissions in different ways, e.g., by use of hydrogen in the blast furnace or by production of iron via …
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