Coal is the dominant fuel in China to provide primary energy, and 70% of polyvinyl chloride is produced from coal-based CaC 2.CaC 2 reacts with water to produce acetylene and calcium carbide slag (CCS) as a solid waste for polyvinyl chloride production. Approximate 40 million tons of dry CCS are generated annually in China, …

Furthermore, carbide slag is also expected to be used in the production of high value-added fine chemical products, such as calcium chloride and nano-calcium carbonate [12][13][14] [15] [16 ...

It is a much meaningful research direction to improve the existing carbide slag–gypsum desulfurization technology to overcome the above problems. ... The preparation of calcium carbonate from carbide slag can realize the high value-added utilization of carbide slag . As an important fine chemical product, calcium carbonate is widely used.

Among the solid wastes listed, desulfurization slag has a greater carbon sequestration potential, as it contains 45 %–60 % CaO (according to the literature ... Factors affecting the precipitation of pure calcium carbonate during the direct aqueous carbonation of flue gas desulfurization gypsum. Energy, 65 (2014), pp. 527-532.

Corpus ID: 265539940. Preparation of calcium carbonate with micro and nano structure from carbide slag for CO2 sequestration by using recyclable ammonium …

In this work, industrial Kambara reactor desulphurization slag (KR slag) was indirectly carbonated. The effects of leaching time, leaching temperature, leaching agent types, and leaching agent concentration on the leaching ratio of calcium from KR slag were investigated. Subsequently, precipitated c …

Sulfur dioxide (SO2) in combustion exhaust gas from medium-scale facilities must be removed because it pollutes the air. In this study, dry-DeSOx filters, particularly calcium carbonate, that used simple desulfurization materials to capture SO2 is focused on. Physically modified calcium compound, which is the main ingredient of marine waste …

Carbon capture capacity of desulfurization gypsum and carbide slag. Since the skeleton material DGCS is composed of two substances, ... and less calcium carbonate can be generated, with a lower reaction rate; with the passage of time, the Ca 2+ in the solution is consumed, and then the undissolved calcium salts are dissolved, ...

CO2 sequestration by flue gas desulfurization gypsum (FGDG) has become a promising FGDG disposal technology due to simultaneous CO2 emission reduction and FGDG conversion into calcium carbonate.

DOI: 10.1016/j.jclepro.2022.132463 Corpus ID: 249221537; Preparation of calcium carbonate nanoparticles from waste carbide slag based on CO2 mineralization @article{Li2022PreparationOC, title={Preparation of calcium carbonate nanoparticles from waste carbide slag based on CO2 mineralization}, author={Wenxiu Li and Yan Huang …

The extensive accumulation of phosphorus slag (PS) not only occupies land but also pollutes the environment. In the present study, calcium carbide slag (CS) and desulfurization gypsum (DG) were used to synergistically activate PS, and metakaolin (MK) was added to provide additional Al 2 O 3 for the cementitious system.The setting …

Teir et al. Teir et al. (2016) produced calcium carbonate from carbon dioxide in flue gases and SS. In the study, the first step was extracting calcium from the slag using ammonium chloride as the solvent. Then, the extracted calcium reacted with CO 2 in flue gas and precipitated as CaCO 3. The process would remove 0.3 t CO 2 per tons CaCO 3 ...

Calcium extraction from steelmaking slag and production of precipitated calcium carbonate from calcium oxide for carbon dioxide fixation. J Ind Eng Chem. 53, 233–240 (2017).

Calcium carbonate synthesis from Kambara reactor desulphurization slag via indirect carbonation for CO2 capture and utilization | Request PDF. DOI: …

The development of sorbents for flue gas desulfurization in a dry mode is essential to control emission of sulfur dioxide. Based on the novel concept of "treating waste with waste", a low-cost and highly activated calcium-based sorbent (ACS) was prepared using coal fly ash, CaO and waste gypsum as the raw materials via the one-step incipient …

Semantic Scholar extracted view of "Preparation of calcium carbonate with micro and nano structure from carbide slag for CO2 sequestration by using recyclable ammonium chloride" by Jin Yao et al. ... Effect of carbon capture on desulfurization gypsum/carbide slag phase-change composites for waste removal and renewable …

Abstract. In this work, industrial Kambara reactor desulphurization slag (KR slag) was indirectly carbonated. The effects of leaching time, leaching temperature, leaching agent types, and leaching agent concentration on the leaching ratio of calcium from KR …

Desulfurization slag has the potential to produce autoclaved aerated concrete. •. The ing of mortars is retarded due to the insufficient alkalinity. •. Using …

Limestone (calcium carbonate) is used in the manufacture of iron and cement. In the production of iron, limestone is added to the blast furnace where it decomposes to form lime (CaO) and carbon dioxide. The CO 2 produced is reduced to carbon monoxide, CO, by coke (almost pure carbon) where it acts as a reducing agent transforming iron ore into ...

The calcium carbide slag was dried, ground, passed through a 200-mesh sieve, and placed in a three-necked flask, and a certain amount of water was added at the set solid-to-liquid ratio to carry out a desul-furization experiment at room temperature of 25 °C. The gas low was 500 mL·min−1.

This study proposes a novel method for simultaneously dealing with the waste carbide slag (WCS) and CO 2 mitigation. In addition, the ultrafine vaterite CaCO 3 with high economic value was produced under mild conditions of 25 °C and 0.1 MPa. Ammonium sulfate ((NH 4) 2 SO 4) was employed to efficiently extract calcium from …

In the present route, the total CO2 sequestration capacity per tonne of blast furnace slag reached up to 316 kg, and 313 kg of Al-rich precipitate, 1000 kg of carbonated product containing CaCO3 ...

In fact, the high composition of calcium sulfate dihydrate, > 95 w/w% in most of the cases (Wang et al. 2009; Song et al. 2014 Song et al., 2015, makes flue gas desulfurization gypsum waste a ...

Coal combustion products (CCP) are fly ash, bottom ash (or boiler slag), and flue-gas desulfurization gypsum. All have three fundamental properties: chemical composition, mineral composition, and particle size distribution. ... The calcium carbonate in the limestone reacts with the SO 2 and oxygen from the air to produce gypsum, which ...

In order to realize the resourceful, large-scale, and high-value utilization of steel slag, which is a bulk industrial solid waste, and to reduce the use of cement-based cementitious materials, this study adopted the coupled excitation effect of sodium carbonate–magnesium oxide–desulfurization gypsum to excite steel slag-based …

Finally, the treated flue gas is absorbed by NaOH solution and dried with anhydrous calcium chloride before being directed into the flue gas analyzer for analysis. Figure 1 Schematic diagram of ...

Spherical calcium carbonate (CaCO 3) is widely used in industries. However, its large-scale synthesis still remains a challenging issue. ... In this study, direct mineral carbonation of semi-dry desulfurization slag (SDe-S) through an aqueous route was investigated with an online carbonation setup to measure the amount of CO 2 consumed …

Based on salt effect and the solubility equilibrium theory of insoluble electrolyte, the technological process of ammonia-enhanced desulfurization gypsum carbonation for CO 2 sequestration in NH 4 Cl-H 2 O system was studied, and calcium carbonate with different crystal phase and morphology was prepared in this paper. The …

Based on the composition characteristics of carbide slag and the application of polyvinyl chloride, a method of preparing calcium carbonate with microstructure and nanostructure by using carbide slag as a raw material and ammonium chloride as a leaching agent was proposed. The factors for the preparation of calcium carbonate and the effects of …

For the carbide slag-wet desulfurization system, the flue gas enters the desulfurization tower where the flue gas and the carbide slag slurry are in gas–liquid reverse contact …

In purpose of the gradual decrease of calcium carbonate resources and reduction of carbon emissions in wet flue gas desulfurization process, the utilization process of carbide slag to replace ...

Phosphogypsum (PG) desulfurization slag is a calcium-rich residue from reductive decomposition of PG using sulfur as the reductant. We proposed a technology of preparation light calcium carbonate ...

Among the carbide slag desulfurization methods, in the spray reaction section of the desulfurization tower, the reaction speed of sulfur dioxide and calcium hydroxide is much higher than that of the limestone method. ... These products include calcium oxide, bleaching powder, and calcium carbonate. Carbide slag is dehydrated, …