WEBMost of the coal, oil and natural gas produced in the world are used as fuels and a small part is used as a chemical feedstock. Undesulfurized coal and oil in the combustion process will produce a large number of sulfur oxides (SOx), serious harm to human health, and environmental damage. The unpurified natural gas containing hydrogen sulfide .
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WEBApr 23, 2023 · The transformation from pyrite to soluble FeSO 4 and Fe 2 (SO 4) 3 is the main reason for highsulfur coal desulfurization during the process of wetgrinding. Therefore, this investigation puts forward a new and friendly desulfurization method for coal desulfurization.
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WEBApr 6, 2022 · The order of magnetism in these coal products is as follows: Pyrrhotite > Troilite > pyrite. In addition, the specific magnetization of fine coal first increases and then decreases. With decreasing particle size, the specific magnetic susceptibility X 0 of fine coal decreases gradually; however, the desulfurization degree, S rej, increases ...
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WEBThis study aims to understand the roles of hydrogen and carbon monoxide during the desulfurization process in a coal gasifiion system that H2S of the syngas was removed by Fe2O3/SiO2 sorbents. The Fe2O3/SiO2 sorbents were prepared by incipient wetness impregnation. Through the breakthrough experiments and Fourier transform infrared ...
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WEBAug 8, 2019 · The microwaveassisted chemical process is environmentally friendly and energysaving. In this study, microwave irradiation was applied to enhance the hot coal gas desulfurization process with modified semicokesupported Fe 2 O 3 as the sorbent. The results indie that the sorbent with 20% Fe 2 O 3 shows the greatest breakthrough .
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WEBSep 5, 2018 · Hot coal gas desulfurization process operating at elevated temperature (600–850 °C) is an efficient and environmentally friendly process for raw syngas purifiion (Tamhankar et al. 1986). The sketch of hot coal gas desulfurization process is depicted in Fig. 1. Coal was gasified at temperatures of > 1000 °C to produce raw .
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WEBAug 15, 2020 · The effect of coal feed size on S rej was studied by using a microwave pretreatment time of 3 min and a background field strength of 2750 Gs. As Fig. 7 shows, the desulfurization rate increased monotonically with decreasing coal particle size, attaining a maximum value of 48% when the feed particle size was − mm. The reason for this .
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WEBDOI: / Corpus ID: ; Experimental Study of Flue Gas Desulfurization Wastewater Zero Discharge from Coalfired Power Plant inproceedings{Li2016ExperimentalSO, title={Experimental Study of Flue Gas Desulfurization Wastewater Zero Discharge from Coalfired Power Plant}, .
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WEBApr 1, 1989 · A successful precombustion coal desulfurization process is very likely to be a hybrid process that integrates chemical, physical and microbial approaches. Nevertheless, I believe it is the microbial approach that holds the greatest promise of over coming that formidable obstacle organically bound sulfur.
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WEBFeb 1, 2015 · This study aims to understand the roles of hydrogen and carbon monoxide during the desulfurization process in a coal gasifiion system that H 2 S of the syngas was removed by Fe 2 O 3 /SiO 2 sorbents. The Fe 2 O 3 /SiO 2 sorbents were prepared by incipient wetness impregnation. Through the breakthrough experiments and Fourier .
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WEBApr 1, 2024 · Efficient pyrolytic desulfurization with high char yield is a promising yet challenging approach for the cleaner utilization of abundant highsulfur coal reserves. In this study, we have discovered that a single pyrolysis process under either oxidizing or reducing conditions cannot efficiently remove various sulfur forms while preserving a .
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WEBDOI: / Corpus ID: ; Coal desulfurization by photoalytic oxidation in the presence of [HO2MMim][HSO4] and H2O2 article{Wang2021CoalDB, title={Coal desulfurization by photoalytic oxidation in the presence of [HO2MMim][HSO4] and H2O2}, author={Lanyun Wang and Wen Xinglin .
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WEBApr 23, 2005 · Abstract. In this paper, a twostep desulfurization process for highsulfur coal was investigated. Two Chinese coals with the addition of 10 wt % potassium hydroxide or sodium hydroxide were ...
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WEBMar 1, 2011 · During the desulfurization process, the reaction, evaporation, crystallization, and trapping of hightemperature flue gas and desulfurization slurry may form new fine particles or adsorb on the ...
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WEBDec 15, 2021 · Therefore, removing sulfur from coal under mild conditions with low loss of calorific value are an important challenge for coal desulfurization process [14]. Photoalytic oxidative desulfurization technology can be carried out under normal temperature and pressure with good selectivity and high oxidation degree [15], [16].
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WEBOct 1, 2001 · 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 .
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WEBMay 16, 2020 · Magnesia FGD is an appealing process especially for small and medium industrial boilers due to its high desulfurization capacity, process simplicity, small cost, and low energy consumption. Magnesium sulfite produced from this method can be easily regenerated by heat decomposition between 900 and 1000 °C, similar to the .
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WEBFeb 15, 2009 · But it can be enwrapped by desulfurization reaction products to form a dense irregular blocklike structure after CaCO 3 desulfurization process. And fine particles are mostly of cube or prism ...
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WEBApr 1, 2021 · Pervaporative desulfurization process, Adopted from Reference [18] ... It is a black coallike crystalline material containing SiO 2, Al 2 O 3, Fe 2 O 3, CaO, MgO, and fixed carbon. Hariprasad et al. [126] investigated dolochar and activated dolochar in adsorptive desulfurization of crude oil. The result is encouraging since the ...
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WEBApr 1, 2003 · Desulfurization of the gases from coal combustion was studied, using limestone (marble) as the sorbent in a fluidizedbed reactor. The kinetic parameter, k, was measured by analyzing the reduction ...
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WEBSep 22, 2016 · Special attention is required on the fine particle control after desulfurization because a large quantity of fine particles are emitted into the atmosphere from the coalfired power plants. In an attempt to figure out the transformation of fine particles during the limestone gypsum desulfurization, the physical properties of fine particles before and .
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WEBApr 15, 2022 · The desulfurization sludge was collected from four coalfired power plants loed in China's Shandong Province (two power plants, A and B) and inner Mongolia (two power plants, C and D). The detailed configuration and the air pollution control devices (Ds) are summarized in Table 1.
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