The relationship between speciation and release ability of …

In Zhejiang province, the FGD gypsum production was 3.69 million tons in 2010 [35]. As shown in Table 4, the average Hg concentration in FGD gypsum was 1.07 μg/g; it assumes that the Hg release potential for FGD gypsum in Zhejiang province was about 3.95 tons in 2010. The multipurpose utilization of FGD gypsums in China started …

Sorptive removal of phosphorus by flue gas desulfurization gypsum …

The flue gas desulfurization (FGD) gypsum produced as an energy plant waste byproduct has recently been advocated as a physiochemical remediation strategy for P through sorptive removal. However, limited research is available on the practical applications of FGD gypsum for P removal from water. Herein, batch sorption …

Use of flue gas desulfurization (FGD) by‐product gypsum …

Four and one‐half, 9, and 18 mt/ha of either commercially available agricultural gypsum or two gypsum by‐products were applied to a Rayne soil (Fine‐loamy, mixed, mesic Typic Hapludult) with a strongly acid subsoil. Agricultural and FGD gypsum increased alfalfa DM yields by as much as 21 and 14%, respectively.

Combined Application of Flue Gas Desulfurization Gypsum …

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 …

Recent advances in flue gas desulfurization gypsum …

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 physical properties, FGDG has been used in several beneficial …

Research on saline-alkali soil amelioration with FGD gypsum

Abstract. Flue gas desulfurization (simplified as FGD) gypsum, a kind of byproduct from wet FGD process of coal-fired power plants, was used to ameliorate saline-alkali soil. The FGD gypsum can react with the main content of saline-alkali soil to improve the soil properties. The technology has been applied for around 120 km 2 in China with ...

Basic characteristics and comprehensive utilization of FGD …

The thermal instability of most mercury (Hg) species in flue gas desulfurization (FGD) gypsum may lead to the release of large amounts of Hg into the …

Mineral carbonation of flue gas desulfurization gypsum for …

Waste gypsum is an industrial waste that falls in two categories: flue gas desulfurization (FGD) gypsum and phosphogypsum. FGD gypsum is mostly generated in the process of SO x elimination from power plant flue gas, while phosphogypsum is generated when phosphate fertilizer is produced by acid treatment of phosphate rock.

Review of Design, Operating, and Financial Considerations in …

The various flue gas desulfurization (FGD) technologies available in the market, for the reduction of sulfur dioxide emissions, are presented. The process descriptions are discussed and the capital and operating costs of the various methods are presented. ... FGD gypsum can be produced at purity levels well over 90%, to equal or …

Flue Gas Desulfurization (FGD) Working | Thermal Power …

The dewatered gypsum will be produced from FGD system, temporarily stored in the gypsum shed and discontinuously transported to offsite to load a truck by wheel loader. Process Chemistry of Flue Gas Desulfurization (FGD) In a wet limestone forced oxidized scrubbing system, a complex series of kinetic and equilibrium controlled

Basic characteristics and comprehensive utilization of FGD gypsum

Abstract. Firstly the basic characteristics of Flue-gas-desulfurization gypsum (FGD gypsum) is described in this paper. Then the research status of FGD gypsum is introduced, especially the comprehensive utilization of FGD gypsum. Finally, some suggestions are put forward to solve the problems existing in the application of FGD …

Technical feasibility for use of FGD gypsum as an additive …

Flue gas desulfurization (FGD) gypsum was evaluated as a setting time retarder to replace the natural gypsum in the production of Portland cement (CP II E-32). ... When only FGD gypsum is used in the mortar (M4), the resistance is lower that when used mixtures of natural gypsum/FGD gypsum, but it is still higher compared to the mortar …

Study on performance and function mechanisms of whisker …

The particle size distribution of the FGD gypsum is shown in Fig. 1, and the average particle diameter is 26.822 μm. Fig. 2 shows the X-ray powder diffractometry (XRD) diffraction pattern of the FGD gypsum, which indicates that the crystalline phase is mainly CaSO 4 ·0.5H 2 O. Scanning electron microscopy (SEM) images of the raw materials are …

Extensive reclamation of saline-sodic soils with flue gas

Fortunately, a huge amount of flue gas desulfurization (FGD) gypsum is produced from the combustion of coal for electrical energy production. In China, for example, the production of FGD gypsum was 75.5 Mt in 2013 according to the China Electricity Council (Pan et al., 2015).

Carbon Dioxide Sequestration with Flue Gas Desulfurization (FGD) Gypsum …

Abstract: Carbonation of industrial alkaline residues can be used as a CO 2 sequestration technology to reduce carbon dioxide emissions. In this study, alkaline Ca-rich flue gas desulfurization (FGD) gypsum samples were carbonated to a varying extent. These materials are cheap, available near large point sources of CO 2 (power plant), and tend …

Basic characteristics and comprehensive utilization of FGD gypsum

Flue-gas-desulfurization gypsum (FGD gypsum) is an industrial b y-product gypsum obtained by desulfurizing and purifying the f lue gas generated after combus tion of sulfur-containing fuel (coal, oil,

A facile method of transforming FGD gypsum to α-CaSO

Introduction. Flue gas desulfurization gypsum (FGD gypsum), which is mainly composed of CaSO 4 ·2H 2 O (DH), is the industrial waste residue produced by …

Effects of applying flue gas desulfurization gypsum and

Flue gas desulfurization (FGD) gypsum from the coal-fired power plant is a combustion by-product produced in high quantities. In China, more than 40 million tons of FGD gypsum had been produced by 2010 (Yu et al. 2014). In case of resource conservation and environment protection, it is highly important to investigate the …

Preparation of α-High Strength Gypsum from Flue Gas Desulfurization …

The synthesis of α-calcium sulfate hemihydrate (α-CSH) from flue gas desulfurization (FGD) gypsum is a good way to realize the comprehensive utilization of FGD gypsum.To obtain α-CSH with the satisfactory performances, a facile hydrothermal-aging pretreatment process for FGD gypsum raw materials was proposed, where FGD …

Mitsubishi Power | Flue Gas Desulfurization (FGD) Plants

The flue gas desulfurization (FGD) plant removes sulfur dioxides (SO 2) from flue gas produced by boilers, furnaces, and other sources. Mitsubishi Power effectively contributes to the prevention of air pollution through its wet limestone-gypsum FGD process and seawater FGD process, and both processes can treat a large range of SO 2 ...

The Effects of Flue Gas Desulfurization Gypsum （FGD …

Flue gas desulfurization gypsum (FGD Gypsum) is an industrial byproduct derived from the desulfurization of flue gas produced by the combustion of sulfur-containing fuels (mainly coal) and has been widely applied for improving agricultural soils and for the investigation and practice of mine reclamation (Dick 2006; Chen 2011). Studies have

A comprehensive review of flue gas desulphurized gypsum: …

Flue gas desulfurization (FGD) gypsum is a byproduct of the combustion of coal, used for electricity generation. This material is generated during the process of scrubbing flue gases from power plants to remove sulfur dioxide emissions, which contribute to acid rain and other environmental problems. As concerns over environmental …

Production and resource utilization of flue gas desulfurized gypsum …

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 …

Study on properties of untreated FGD gypsum-based high …

In this study, the untreated FGD gypsum is used successfully to prepare a gypsum-based high-strength building materials, mechanical properties, hydration products, pore structure, micromorphology, hydration reaction mechanism, and other important microscopic and macroscopic properties of the building materials are all …

Flue-Gas Desulphurization

Solid Wastes. Nicholas P. Cheremisinoff, in Clean Electricity Through Advanced Coal Technologies, 2012 2.5 Flue-Gas Desulfurization Material. Flue-gas desulfurization (FGD) material is a product of a process typically used for reducing SO 2 emissions from the exhaust gas system of a coal-fired boiler. The physical nature of these materials …

The effects of flue gas desulfurization gypsum (FGD gypsum) …

The effects of flue gas desulfurization gypsum (FGD gypsum) on P fractions in a coastal plain soil. Soils, Sec 2 • Global Change, Environ Risk Assess, …

Effect of impure components in flue gas desulfurization (FGD) gypsum …

1. Introduction. Limestone/gypsum wet desulfurization technique has been widely used to remove sulfur oxides from flue gas or other industrial waste gas due to its high desulfurization efficiency and stability [1].It is reported that huge amount of FGD gypsum has generated worldwide, especially in China (80 Mt, 2017) and USA (30 Mt, …

Flue Gas Desulfurization

This reaction is of great interest in the study of wet flue gas desulfurization processes. In the case of the normally used absorption additive lime, the oxidation of S(IV) is an essential step in quantitatively producing the final product, gypsum (CaSO 4 - 2H 2 O). Beside detoxication of S(IV) the dewatering properties of gypsum are improved when a high …

Hydration and mechanical properties of FGD gypsum

1. Introduction. Flue gas desulfurization (FGD) gypsum is an industrial by-products, which primarily consists of dihydrate gypsum (CaSO 4 ⋅2H 2 O),and the treatment of 1 t of SO 2 in coal flue gas by limestone-gypsum wet desulfurization technology will produce about 2.7 t of FGD gypsum, and China emitted nearly 100 …

Transformation of flue gas desulfurization (FGD) gypsum …

A novel way for transformation of flue gas desulfurization (FGD) gypsum, an industrial by-product to β-CaSO 4 ·0.5H 2 O whiskers is investigated for calcium sulfate rich alternative construction material. As the consumption of gypsum products is increasing in construction industry and limited amount of natural gypsum is available, herein facile …

Sulfur dioxide removal: An overview of regenerative flue gas …

Numerous mitigation techniques have been incorporated to capture or remove SO2 with flue gas desulfurization (FGD) being the most common method. Regenerative FGD method is advantageous over other methods due to high desulfurization efficiency, sorbent regenerability, and reduction in waste handling. The …

Research on saline-alkali soil amelioration with FGD gypsum

Flue gas desulfurization (simplified as FGD) gypsum, a kind of byproduct from wet FGD process of coal-fired power plants, was used to ameliorate saline-alkali soil. The FGD gypsum can react with the main content of saline-alkali soil to improve the soil properties. The technology has been applied for around 120 km 2 in China with …

Production and resource utilization of flue gas desulfurized …

Calcite waste produced by the carbonation reaction of FGD gypsum, which is a low-cost adsorbent for wastewater desulfurization (Song, K. et al., 2011). …

Agricultural Uses for Flue Gas Desulfurization (FGD) Gypsum

This process is known as flue gas desulfurization (FGD), and the gypsum produced is known as FGD gypsum. The term FGD gypsum is the name most often used by generators of the material. Other names include recaptured gypsum, byproduct gypsum, and synthetic gypsum. All of these terms refer to the same material produced by the …

Impact of Flue Gas Desulfurization Gypsum Applications to …

Soil amendment with flue gas desulfurization (FGD) gypsum is one such potential control strategy for P (Wang & Yang, 2018; Endale et al., 2014). Flue gas desulfurization gypsum is a by-product of coal-burning electric power plants produced during the flue gas scrubbing process that removes sulfur from the flue gas per the …

Preparation of high-performance building gypsum by calcining FGD gypsum

1. Introduction. Flue gas desulfurization (FGD) gypsum is an inevitable industrial solid waste originated from the process of calcium-based wet flue gas desulfurization in thermal power plants and some chemical plants in order to reduce the emission of SO 2 pollution gas [1], [2].In China, the total product of FGD gypsum has …

FGD Gypsum and Sustainability

Reduced water and energy consumption, landfill avoidance, and preservation of natural resources are just some of the advantages flue gas desulfurization (FGD) gypsum …

Preparation of superfine and semi-hydrated flue gas desulfurization …

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.