The study aims to develop a thorough understanding of the desulfurization process and establish a theoretical framework for advancing clean coal technology and efficient coal utilization. Stringent control was maintained over parameters such as particle size, pretreatment time, bacterial species, and bacterial concentration.
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XANES was used to analyze the change of sulfur forms in the desulfurization process of high organic sulfur coal under microwave heating and conventional heating conditions. The effects of microwave fields on the molecular properties, bond strength and reaction kinetic of organic sulfurcontaining groups were studied by quantum chemical calculation.
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The flue gas desulfurization solids in the dry process (DFGDS) are the newly formed CaSO 4 and the unreacted excess of CaO. They are carried along with the coal FA out of the boiler, forming the end product (FA + DFGDS), which is highly alkaline due to the excess of CaO with respect to the initial SO 2 (Ca:S = ). Due to a low ...
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Flotation desulfurization is the process of separating sulfur from coal samples into tailing products based on the differences in the physical and chemical properties of the mineral surfaces without changing the original sulfur content of the entire coal. ... and {111} facets in alk. soln., which is beneficial to the coal desulfurization. These ...
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Mechanism of Pyrite Microbial Desulfurization. The oxidation process of coal conversion is possible by microorganisms after getting influenced by the polyfunctional coal structure and this process usually depends on two main factors: size or shape of coal and surface properties of microorganisms (Konishi et al. 1990). The morphology and ...
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article{osti_, title = {Coal desulfurization by a microwave process}, author = {Zavitsanos, P D and Golden, J A and Bleiler, K W and Jacobs, I S}, abstractNote = {A laboratory size flow reactor was developed and tested on coal samples up to 100 g/batch. A modified version of the applicator will increase sample size to 1000 g; when run continuously it can handle 500 g to 1000 g/minute.
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This study investigated the characteristics of mercury emitted from a largescale coalfired power plant in Taiwan via intensive sampling campaigns. The air pollution control devices equipped in this coalfired power plant include selective catalytic reduction, fabric filter and seawater flue gas desulfurization. During three sampling campaigns, mercury concentrations emitted from this large ...
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As a typical industrial byproduct during the flue gas desulfurization process of coalfired, flue gas desulfurization ash (FGDA) with alkali mineral can facilitate the water damage resistance of asphalt mixtures. However, low density and high hydrophilic coefficient of FGDA limit its improvement effect. Hence, the comprehensive moisture ...
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Desulfurization systems in coalfired power stations often suffer the problem of high operating costs caused by a ruleofthumb control strategy, which implies great potential for optimization of the operation. ... In this paper, an operation strategy optimization method for the desulfurization process is proposed based on a data mining ...
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Coal desulfurization is imperative to create clean coal and reducing harmful emissions during the combustion process. However, organic sulfur in coal is more difficult to remove than inorganic sulfur. Therefore, in this paper, a method of coal sample desulfurization using citric acid with microwave assisted was proposed, and experimental ...
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Flue gas desulfurization (FGD) systems using lime or limestone as the chemical reagent are widely used throughout the world for SO 2 emissions control at coalfired power plants. Ammoniabased ...
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Physical desulfurization methods can only remove inorganic sulfur and are economical and practical in nature. 14,15 Highgradient magnetic separation technology is an effective method for physical desulfurization, which can be used to deal with fine particles of paramagnetic minerals and is applied to the desulfurization of fine coal (mainly ...
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The flue gas desulfurization process in coalfired power plants is energy and resourceintensive but the ecoefficiency of this process has scarcely been considered. Given the fluctuating unit load and complex desulfurization mechanism, optimizing the desulfurization system based on the traditional mechanistic model poses a great challenge. In this regard, the present study optimized the eco ...
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Coal desulfurization has come a long way in the past 15 years, and chemical desulfurization has been at the forefront of this progression. Unfortunately, unless some new technique is developed, the chemical desulfurization processes appears to be at a stalemate. ... The Meyers process of removing pyritic sulfur from coal chemically before it ...
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The combined effect of desulfurization and ash removal in the process of coal desulfurization by microwave with peroxyacetic acid was determined by evaluating variations in minerals and sulfur forms using Xray diffraction and Xray photoelectron spectroscopy. Dielectric properties of minerals or organic sulfur functional groups in coal were studied utilizing a vector network analyzer in the ...
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environment, the desulfurization and denitration of flue gas in the combustion process of coal has become an important step. T his work summarizes the desulfur ization and denitration
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For future approaches, as well as desulfurization process, increasing the purity of coal may also promote the value of coal and prevent environment pollution. In the study of Etemadifar et al., growing and resting cells of heterotrophic Rhodococcus erythropolis strains PD1, R1, and FMF, and R. qingshengii were utilized in sulfur removal and ...
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Coal desulfurization Full Record Related Research Abstract The Meyers process of removing pyritic sulfur from coal chemically before it is burned is presented.
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The main factor for the results above was that the desulfurization mechanisms were different. Therefore, the research of different desulfurization mechanisms is the main direction of future work. The consequence of this paper would provide data support for the selection of the desulfurization method for high sulfur coal.
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This work was conducted through field tests on a coalfired circulating fluidized bed boiler with a condensation scrubber (CS) for flue gas waste heat recovery installed behind the wet flue gas desulfurization (WFGD) scrubber. Levels of multiple pollutants were investigated along the various flue gas devices of the boiler, with the CS being the ...
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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