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1.1. Flue gas desulfurization processes. The flue gas desulfurization (FGD) processes can be separated into two main categories: once-through and regenerable processes, depending on how the sorbent is treated after SO 2 adsorption (Srivastava and Jozewicz, 2001).Once-through, or non-regenerable, processes utilize the sorbent as a …
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The desulfurization byproduct of magnesium sulfate (MgSO 4 ), converted from oxidation of magnesium sulfite (MgSO 3 ) by injected air, is generally used as fertilizer or chemical resource raw ...
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DOI: 10.1016/j.jmrt.2022.01.070 Corpus ID: 246263559; The hydration mechanism of magnesium oxysulfate cement prepared by magnesium desulfurization byproducts @article{Du2022TheHM, title={The hydration mechanism of magnesium oxysulfate cement prepared by magnesium desulfurization byproducts}, author={Huihui Du and Jiajie Li …
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The content of sulfur in commercial pig iron is generally between 400 × 10 −6 and 600 × 10 −6, while that in cast iron is between 40 × 10 −6 and 500 × 10 −6, which means that a controllable desulfurization process for pig iron products is necessary.Magnesium injection is a widely used hot metal pretreatment method with …
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Various flue gas desulfurization processes —physicochemical, biological, and chemobiological—for the reduction of emission of SO 2 with recovery of an …
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Desulfurization wastewater is industrial wastewater with a high salt content, high metal ions, and high hardness produced by flue gas desulfurization of the limestone-gypsum method in coal-fired power plants. This paper summarizes the source of desulfurization wastewater, water quality characteristics, water quality impacts, and …
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To reduce the cost of the current commercial desulfurization and eliminate effluents, the MgO-based desulfurizer fixed bed desulfurization tests were carried out in a dry environment. By means of X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy, the absorption effects of the MgO-based desulfurizer on …
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characteristics. Magnesium oxide (MgO) wet flue gas desulphurization has been favored because of its high desulfurization efficiency, simple operation and difficult scaling. It is …
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Almamet's products are used in chemistry, hot metal treatment and pyrotechnics. Its systems are used for desulfurization. Several other industries benefit from its services. The spectrum of activities includes the recycling of magnesium. Almamet offers ideal solutions for the metallurgical and chemical industry.
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Magnesium hydroxide, reclaimed from the flue gas desulfurization system (FGD) at the Zimmer Power Plant, Cincinnati, Ohio, is a weak base, in the form of either …
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reduction of slag and dust as well as recycle and treatment of these by-products are important subjects. Magnesium desulfurization of hot metal itself is a well known technol-ogy,5) but Yang et al.1–4) have shown a possibility of highly efficient magnesium desulfurization of hot metal as shown in Fig. 1. The important concept included in ...
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sulfate, a by-product of the magnesium desulfurization pr ocess, needs to be pressed into a filter cake and stored on the ship, which requires a certain floor area a nd cannot be unloaded until ...
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The byproducts of Mg desulfurization has similar properties to that of industrial grade-Mg sulfate, the difference being that the byproduct of desulfurization is MgSO 4∙ 6H 2 O with other impurities and that of industrial grade Mg sulfate is MgSO 4 ∙7H 2 O. The main raw material of MOS (Mg oxysulfate cement) is industrial-grade MgSO 4 …
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Various flue gas desulfurization processes —physicochemical, biological, and chemobiological—for the reduction of emission of SO 2 with recovery of an economic by-product have been reviewed. The physicochemical processes have been categorized as "once-through" and "regenerable."
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Highlights A systematical study on a novel magnesium-based WFGD process with a spray scrubber. Na 2 S 2 O 3 was found effectively to inhibit the oxidation of desulfurization byproduct. The desulfurization efficiency could reach a high level above 90%. A desulfurization process model was established by the double-film theory. The …
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Purpose For an alkaline–saline region in Northwest China, we examined the responses of soil microbial communities to flue gas desulfurization gypsum by-products (FGDB), a new ameliorant for alkaline–saline soils. In 2009 and 2010, we collected soils from 0–20 cm and 20–40 cm depths along an experimental FGDB gradient (0, 0.74, …
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Flue gas desulfurization gypsum (FGDG) is an industrial by-product of the flue gas desulfurization process in coal-fired power plants [28]. The continuous development of our industrial era will bring more and more industrial by-products. The process of treating FGDG requires substantial financial resources and land [29], [30]. …
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Flue gas desulfurization (FGD) sludge is a by-product generated by air pollution control systems used in coal-fired power plants. The objective of this work was to stabilize FGD gypsum and FGD filter cake with Class C fly ash.
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One is decomposition of the desulfurization product of MgS under the inert atmosphere. ... calcium carbide and magnesium, during one HMD treatment offers the opportunity to decrease the rea-gent ...
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DOI: 10.1016/J.FUEL.2012.07.050 Corpus ID: 97003714; Studies on magnesium-based wet flue gas desulfurization process with oxidation inhibition of the byproduct @article{Shen2013StudiesOM, title={Studies on magnesium-based wet flue gas desulfurization process with oxidation inhibition of the byproduct}, author={Zhi-jie …
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Semantic Scholar extracted view of "Transposition of wet flue gas desulfurization using MgO by-products: From laboratory discontinuous batch reactor to pilot scrubber" by R. Valle-Zermeño et al.
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The process of hot metal desulfurization by magnesium, reduced by the heat from exothermic reactions, has been investigated. Our research into the thermodynamics of magnesium oxide reduction in ...
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The desulfurization rate (Ds) of SFGDA is defined by the weight change during heat treatment: (2) D s = (1-T S 1 × m 1 T S 0 × m 0) × 100 % where T S0 is the S content in the raw material before calcination, wt%; T S1 is the S content in the raw material after calcination, wt%; D S is the SFGDA desulfurization rate, %; m 0 is the mass of the ...
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The original magnesium slag has poor desulfurization activity, so modification treatments are needed to improve its desulfurization activity. In this article, magnesium slag was modified by ...
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The use of magnesium-enhanced lime avoids the mineral impurities from direct neutralization when using pulverized limestone rock. White, pure FGD synthetic gypsum can be used to produce higher value products such as mineral fillers and industrial plasters. This paper focuses on the product development of the Mg(OH){sub 2} by …
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The kinetics of sulfite oxidation in the magnesium-based wet flue gas desulfurization (FGD) process were investigated in a stirred bubbling reactor by …
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Post-combustion flue gas desulfurization and denitrification technologies are essential in achieving the full compliance of fine particulate matter (PM 2.5, aerodynamic diameter less than 2.5 μm) air quality standards by 2030 in China as sulfur dioxide (SO 2) and nitrogen oxides (NO X) are the main precursors of PM …
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This paper presents a novel magnesium-based wet flue gas desulfurization (FGD) process in which sodium thiosulfate is used to inhibit the oxidation of …
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Magnesium Desulfurization Technology ... The wastewater processing system is divided into three parts, namely: wastewater treatment systems, sludge dewatering system, chemical dosing system. 1. Wastewater treatment system ... and then the concentrated desulfurization by-product is conveyed to the hot air drier by the screw conveyor. By …
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Research Cottrell has demonstrated the commercial availability of limestone flue gas desulfurization on a 115 MW installation. Certain chemistry and process considerations were taken into account ...
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Control and Treatment of Air Emissions. Shahryar Jafarinejad, in Petroleum Waste Treatment and Pollution Control, 2017. 5.1.5 Flue-Gas Desulfurization. Flue-gas desulfurization (FGD) is a scrubbing technique that uses an alkaline reagent (typically a sodium- or calcium-based alkaline regent) to remove SO 2 from flue gas (Tri-State …
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Calcium-based desulfurization ash (CDA) is mainly produced in dry and semi-dry flue gas desulfurization processes. The property of CDA is extremely unstable because its main component, calcium sulfite, makes it difficult to be directly applied to the field of building materials. The modification of desulfurization ash can be realized by …
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The objectives of this research are (1) to characterize the reclaimed magnesium hydroxide, e.g., purity, particle size distribution, dissolution kinetics; (2) to evaluate neutralization capacity and buffering intensity of the reclaimed magnesium hydroxide; (3) to study the efficacy of the reclaimed magnesium hydroxide for nutrient …
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In magnesium-based seawater exhaust gas clean system, the desulfurization by-product, magnesium sulfite (MgSO3), has a negative impact on the ecological environment, which needs to be treated to ...
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Magnesium oxide and Magnesium hydroxide for desulfurization Some industrial processes are associated with significant sulfur level in their gaseous effluent. As regulations on sulfur emissions are getting …
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The magnesium oxide desulfurization by-products were stored in a feed bin after pulverization. A metering screw conveyor was used to send the by-products to a …
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