No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
Integration of flue gas desulfurized gypsum (FGD-gypsum) with cover crops is expected to improve soil quality (SQ). Our objectives were to evaluate the impact of FGD-gypsum and rye on SQ and the contribution of core indicators to account for SQ variability in a rainfed corn-soybean system. ... optimize decomposition with labile C, N, and P ...
The treatment of flue‐gas desulfurization (FGD) gypsum, a common solid waste material that is often affected by chloride ions, typically occupies large amounts of land, causes resource waste ...
To increase the degree of chloride decomposition, it is necessary to increase the temperature. Moreover, the quality of each chloride exhibited a different degree of loss at temperatures ranging from 125 to 180°C. ... (American Coal Ash Association), 1 chloride content in the desulfurized gypsum should be reduced to below 400 ppm. However ...
Analogous to sintering flue gas desulfurization gypsum (the main component is CaSO 4), the SFGDA decomposition product CaO is combined with Fe 2 O 3 to synthesize …
Flue gas desulfurized gypsum (FGDG) is an industrial by-product discharged from thermal power plants, smelters, and large-scale enterprise boilers. ... The DTG curves of all samples show two obvious peaks in the range of 70–160 °C and 560–700 °C, representing the decomposition of (AFt, C–S–H, and CaSO 4 ·2H 2 O) and calcium carbonate ...
Abstract. This study aims to investigate the subsurface gravel ditches and desulfurization gypsum (DG) as amelioration methods for alkalized solonchak soils in Gansu Jingyuan of China (37°02' N, 104°96' E). Three blind ditch spacing (6, 9 and 12 m) and three application rates of desulfurization gypsum (20, 22 and 24 t/hm2)
These APCDs equipment can co-remove substantial Hg from the flue gas and capture it into solid byproducts like FGD gypsum [12], [13], [14]. In fact, denitrification equipment such as SCR could effectively oxidize Hg 0 into Hg 2+, reaching an average oxidation rate of 71% [15], and Hg 2+ is easily removed by wet FGD devices [16]. The highest observed Hg removal …
A flue gas desulfurization process capable of producing a high purity gypsum and also making equipment employed as minimum as possible is provided, which process comprises the steps of cooling and ...
Semidry desulfurization and wet desulfurization in a furnace are usually used in the circulating fluidized bed boiler in the power production of thermal power plants, and these two approaches lead to high calcium content …
The results showed that the addition of coke powder enhanced the thermal efficiency and reduced the decomposition ... it has a more intricate composition than desulfurized gypsum, as the sources of S originate ... 1.0 nm (secondary electrons), 2.5 nm (backscattered electrons); Acceleration voltage: 200 V-30 kV; Maximum beam current 200 nA; The ...
The obtained semi-aqueous desulfurized gypsum was the original desulfurized gypsum, which was placed in an oven at 180 °C and dehydrated for 2 h under synchronous heating with the box. The microscopic morphology of desulfurization gypsum from SEM and XRD analysis is shown in Fig. 1. The original desulfurization gypsum featured rhombic blocks ...
The rapid expansion of coal-fired power plants has led to a significant increase in the production of flue gas desulfurization (FGD) gypsum, a byproduct of sulfur dioxide emission control processes [1], [2].With annual global output reaching millions of tons, FGD gypsum poses substantial environmental challenges due to its large-scale accumulation and potential …
Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. Due to its abundance, chemical and …
In order to realize the reutilization of industrial waste red mud and desulfurized gypsum whiskers, a novel ceramsite was fabricated using red mud and desulfurized gypsum whiskers for the adsorption of Pb(II). The study investigated the impact of red mud / desulfurized gypsum whiskers mass ratio, coupling agent dosages and calcination temperature on the …
In an alkaline medium, the driving force of CO 2 mineralization of desulfurized gypsum is due to the difference in solubility products between CaCO 3 and CaSO 4 ·2H 2 O in water.
The semi-hydrate content of desulfurized gypsum is adjusted as a natural plaster substitute for producing gypsum board, wallboard [107].The modified treatment of desulfurized gypsum with cement, inorganic waste, straw fiber and other wastes can be used to manufacture high-insulation and compression-resistant wall materials [108].Desulfurized gypsum is incorporated into the …
Gypsum whiskers which are also called calcium sulfate hemihydrate whiskers or Calcium sulfate whiskers, are a type of fiber made from calcium sulfate hemihydrate. These whiskers are characterized by their fibrous structure, which has a length-to-diameter ratio of up to 100:1. They have several desirable qualities, including being lightweight ...
Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers.This article reviews the production in China and the latest beneficial utilizations of FGD gypsum. China is a large coal-consuming country and has always had serious SO 2 emissions. Therefore, the Chinese government has …
XRD, SEM and elemental characterization of FGD gypsum. X-ray diffraction analysis revealed that the characteristic peaks at 2θ value of 11.8, 20.8 and 23.5 (Fig. 2a) of the FGD gypsum 1 suggested ...
The results showed that increasing the desulfurized gypsum content is beneficial for promoting the formation of a liquid phase and a uniform pore structure. The prepared ceramics exhibited low density (0.54 g/cm 3 ), high porosity (80.56%), and …
Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. ... growth and yield using desulfurized gypsum in the west of Songnen Plain, northeast China Geoderma, 187–188 (2012), ... Maroto-Valer MM Mercury speciation in gypsums produced from flue gas ...
Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers. This article reviews the production in China and the latest beneficial utilizations of FGD gypsum. China is a large coal-consuming country and has always had serious SO 2 emissions. Therefore, the Chinese ...
The interaction of CaS with CaSO 4 is identified as the primary secondary reaction within the intermediate product CaS. When CaSO 4 is decomposed in an atmosphere comprising 2% H 2, 20% CO ... there is no significant divergence in the surface morphologies of quicklime resulting from the reductive decomposition of desulfurized gypsum and ...
secondary ecological damage and environmental pollution. Therefore, the efficient resource utilization of desulfurized gypsum is of critical importance. The main component of desulfurized gypsum is calcium sulfate dihydrate [6] issues associated with climate change.(CaSO 4 ·2H 2 O), which has the potential to react with carbon dioxide.
Thermal Power Plant generates FGD gypsum as by-product during coal combustion. This study evaluates the characterization (spectroscopic and elemental), …
oxidized. Both gypsum and anhydrite were decomposed in a continuous manner at temperatures rang ing from 1910 to 2230°F. With temperatures of 2100°F and higher, the solids were 98 to 99% desulfur ized, and with lower temperatures, the solids were desulfurized less. However, conversion to calcium
The ultra-high addition of 20 % desulfurized gypsum is beneficial to improve the strength of DG-based binary cementitious materials with low energy consumption. The increased strength of …
Desulfurized ash contains about 21.33% hemihydrate calcium sulfite, 18.11% calcium carbonate, 28.55% dihydrate gypsum, 25.81% calcium hydroxide, 1.85% calcium oxide. Particle size distributions of hemi-hydrate gypsum and desulfurized ash are given in Fig. 1 A. The specific surface areas of desulfurized ash and hemihydrate gypsum are 351 and
A method for co-producing sulphoaluminate cement and sulfur by using desulfurized gypsum and aluminum ash, comprising: (1) drying aluminum ash, and heating desulfurized gypsum for dehydration to obtain semi-hydrated gypsum; (2) mixing the aluminum ash with the semi-hydrated gypsum according to a preset ratio, pulverizing, and homogenizing; (3) calcining the pulverized …
Decomposition of flue gas desulfurization (FGD) gypsum in the presence of (10 mass %) magnetite and different mass fractions of anthracite, as a reducer, has been …
