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1. Introduction. Magnesium oxysulfate (MOS) cement is a kind of pneumatic cementitious material mixed with light-burned magnesium (LBM) and a certain concentration of magnesium sulfate solution [1]pared with magnesium oxychloride cement, MOS cement offers low thermal conductivity and resistance to high …
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DOI: 10.1016/j.jece.2022.108099 Corpus ID: 249716370; Hydrothermal recovery and reuse of oxidated by-products in magnesium flue gas desulfurization: Experimental studies and molecular dynamics simulation
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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 treatment process involves removing divalent cations (calcium (Ca) and magnesium (Mg)) and anions (sulfate (SO4)) from the FGD wastewater, leaving behind sodium (Na) and chloride (Cl). The wastewater is first treated to remove dissolved CO 2 by air stripping at low pH.
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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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An alternative is a special FGD water treatment plant eliminating excessive fine particles [18]. ... FA and the reaction product of desulfurization are collected separately. In this case, dry end products consist of "pure" FA and low-FA flue gas desulfurization solids (low-FA-FGDS). ... magnesium, and ammonium or other high-solubility salts ...
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Magnesium desulfurization is a wet flue gas desulfurization (WFGD) technology widely used in China, however, the low oxidation rate of magnesium sulfite (MgSO 3), a byproduct of WFGD, causes the subsequent oxidation and crystallization process to require amount energy.Here, we prepared a cobalt-based nitrogen-doped …
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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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A large volume of highly concentrated magnesium salt solution is produced during magnesium flue gas desulfurization. Existing method of concentration recovery …
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The magnesium oxide method recovers desulfurization products by inhibiting and promoting the oxidation of magnesium sulfite. The maximum desulfurization rate is [128], [129] . The zinc oxide method can also recover desulfurized …
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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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Calcium sulfite (CaSO 3) oxidation is the key step in the resource utilization of flue gas desulfurization (FGD) ash waste.However, under natural conditions the oxidation rate of CaSO 3 is very low, limiting its conversion into calcium sulfate, an acceptable product for construction material. This study was devoted to the investigation of the …
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HOT METAL DESULFURIZATION IRON DESULFURIZATION SOLUTIONS. Opta is the world's leading supplier of magnesium reagents, calcium-carbide, and lime-based carrier reagents for use in the iron …
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Wet magnesium oxide is the reaction of MgO and water to produce a magnesium hydroxide slurry for flue gas desulfurization. This method has a high …
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Similarly, a large amount of lime sludge is produced in the United States from water treatment plants that use lime softening to reduce the calcium and magnesium hardness of the source water. Because these by-products currently have limited uses, large portions end up in landfills or, in the case of fines, are used to backfill mined-out areas.
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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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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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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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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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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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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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In this paper, magnesium-modified biochar was prepared by co-pyrolysis using pig manure (PM) as raw material and magnesium-containing desulfurization waste residue (MDWR) from a power plant as magnesium salt, which was used to recover phosphorus from pig farm wastewater, and the phosphorus recovery product was used …
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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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Magnesium injection is a widely used hot metal pretreatment method with high desulfurization efficiency. However, the traditional magnesium particulate injection process has certain problems, such as insufficient kinetic conditions in a molten pool, a short residence time of the desulfurizer in the reactors and splashing caused by rapid …
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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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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 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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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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Moreover, magnesium sulfate, which is obtained as the desulfurization product, can be used as an industrial raw material or agricultural fertilizer and has a high economic value [5] [6][7]. To ...
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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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