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converted into a gypsum slurry by the desulfurization pro-cess. The latter is then dehydrated to produce FGD gypsum (as shown in the following equations).17 Thus, the synthetic FGD gypsum can be used to replace natural gypsum in sev-eral industries.18,19 SO 2 in flue gas: Dissolution of limestone: An overall chemical reaction of the above ...
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Flue gas desulfurization (FGD) process is the most widely used for ( {text{S}}{{text{O}}_2} ) capture in the world, which produce large amount of desulfurization gypsum . It is quite important to find a solution for comprehensive utilization of such desulfurization gypsum not only in the view of environment …
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the amount of flue gas desulfurization (FGD) equipment has increased in large plants such as coal-fired plants, but desulfurization for small-scale and use is
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More than two-thirds of the arable land in the Hetao Irrigation District of Inner Mongolia, China, is suffering from various soil salinization and alkalization, which has …
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Salinization and sodicity are obstacles for vegetation reconstruction of coastal tidal flat soils. A study was conducted with flue gas desulfurization (FGD)-gypsum applied at rates of 0, 15, 30 ...
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Thereafter, the desulfurization process can remove a portion of the trace elements from the flue gas 52, 84; chloride enters the FGD gypsum through this process. 85-87 Furthermore, Chang et al 88 found that the average chloride ion content in FGD gypsum can be as high as 1041.69 mg/L and that chlorine in FGD gypsum exists …
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Flue gas desulfurization gypsum and clover planting alleviated the soil salinization stress. Soil pH and total phosphorus affected the bacterial communities. Total phosphorus affected the fungal communities. Flue gas desulfurization gypsum and clover planting improved jujube quality. The coastal area of Shandong Province, characterized …
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The Flue gas desulfurization (FGD) process is a set of technology that is used to remove the sulphur dioxide (SO2) present in the flue gas, which is exhausted from the thermal power plant during ...
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Flue gas desulfurized gypsum (FGDG) is an industrial by-product discharged from thermal power plants, smelters, and large-scale enterprise boilers. It is produced when sulfur is removed from flues gases in the flue gas desulfurization (FDG) system, and the formation processes are shown by the following equations (Liu et al., …
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1. Introduction. In China, coal-fired power plants produced large amounts of combustion residuals, including fly ash and flue gas desulfurization (FGD) gypsum [1].Due to the increasingly strict air control policy, the amount of combustion by-products has increased rapidly.
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F lue gas desulfurization gypsum (FGDG) is a synthetic gypsum that is created during the removal of SO 2 from flue gas by reacting the SO 2 with calcite (CaCO 3) to form calcium sulfite (CaSO 3 ·0.5H 2 O), which is further treated with wet limestone and forced oxidization to form calcium sulfate (CaSO 4 ·2H 2 O) (Laperche and Bigham, …
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Flue gas desulfurization gypsum (FGDG), a solid waste material generated by power plants, offers a cost-effective solution for preparing backfill materials. Con
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According to the U.S. Energy Information Administration's statistics, in the 2006–2016 period, approximately 42% of the electricity consumed in the U.S.A was produced by coal combustion (U.S. Energy Information Administration, 2018).The coal combustion process generates various types of residues such as fly ash, bottom ash, …
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However, the large-scale application of flue gas desulfurization (FGD) gypsum for the reclamation of high-sodicity wasteland to obtain productive fields still lacks quick and concise evaluation ...
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The scrubbing process is widely used to free flue gas from sulfur dioxide, and FGD gypsum is a by-product that originated in due process [6]. 'Wet-type …
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Fortunately, flue gas desulfurization gypsum (FGDG), a by-product obtained from the desulfurization of coal-fired flue gas, supplies a potential resource of gypsum . The chemical composition of …
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Exchangeable cation concentrations in top soil layers for various flue gas desulfurization (FGD) gypsum application ratios (Values of p on or above the bars are the significances that are > 0.05 ...
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In China, coal constitutes ... the band centered around 1140 cm −1 which splits into two components at around 1140 cm −1 and 1109 cm −1 and the small peaks at 669 ... Stabilization of mercury in flue gas desulfurization gypsum from coal-fired electric power plants with additives. Fuel Process Technol, 104 (2012), pp. 160-166.
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This leads to a continuous increase in production of flue gas desulfurization gypsum (FGDG). Flue gas desulfurization can be generally divided into wet, semi-dry and dry processes, which generate different desulfurization products (Córdoba, 2015). The wet desulphurization is most widely applied due to its high efficiency, stable operation and ...
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1. Introduction. A massive amount of flue gas desulfurization (FGD) gypsum is generated from coal-fired power plants annually. Most FGD gypsum has still dumped in landfills for storage, which would not only involve serious water and air pollution problems and occupational health risks, but also waste large land and gypsum resources.
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Flue gas desulfurization gypsum (FGDG) and fly ash (FA) are by-products from coal-fired power plants that urgently need to be recycled in a sustainable way. This study aims to develop a green binder using FGDG incorporating cement and large-volume FA that can substitute some cement in structural and geotechnical …
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The major bottleneck in SO 2 desulfurization from flue gas is the constituents of the flue gas itself. A typical flue gas from coal-firing plant with medium to high sulfur content has 75–80 vol% N 2, 12–15 vol% CO 2, 1800 ppm SO 2, 500 ppm NOx, 5–7 vol% H 2 O, 3–4 vol% O 2, < 100 ppm CO, and 10–20 mg Nm −3 of …
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Flue gas desulfurization (FGD) gypsum and straw return have been recognized for their roles in reducing soil sodicity and improving soil organic matter. However, there are few studies on the effect of their combination on improving and fertilizing sodic soil. FGD gypsum at a rate of 15 t ha−1 and three types of straw (sunflower seed …
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In semi-dry flue gas desulphurization in a spray dry scrubber, the desulphurization efficiency is a result of the competition between the spray droplets SO2 absorption rate and the droplets drying rate. The complexity of the process is increased by the 3D nature of the hydrodynamics occurring within the dryer. For accurate …
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Calcium sulfate hemihydrate whiskers (CSHW), a multi-functional and high value-added building material, were prepared with flue gas desulfurization (FGD) gypsum by hydrothermal method, which could be a reasonable disposal of FGD gypsum. In order to obtain CSHW of a high aspect ratio, a series of manufacturing parameters such as …
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Current study proposes an effective way to modify the properties of super-sulfated cement (SSC) paste and mortar with preheated flue gas desulfurization (FDG) gypsum at different temperatures and durations, and different sulfate compositions. Preheated FGDs with temperatures between 25 and 150 °C and durations between 0 …
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1. Introduction. Flue gas desulfurized gypsum mainly comes from thermal power plants, smelters, and large-enterprise boilers, and contains industrial by-products …
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The reclamation potential of applying combined brackish ice and flue-gas desulfurization (FGD) gypsum to a coastal saline soil was evaluated in a raised bed …
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Flue gas desulfurization Flue gas desulfurization is commonly known as FGD and is the technology used for removing sulfur dioxide (SO 2) from the exhaust combustion flue gases of power plants that burn coal oroil to produce steam for the turbines that drive their electricity generators.
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Flue gas desulfurization (FGD) gypsum has been used as an amendment to reduce soil salinization and alkalinization worldwide. However, the effective and safe use of FGD gypsum in agricultural land is still debatable in some countries, although many studies have reported its beneficial effects on soil management. Therefore, a study was conducted on …
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