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, …

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 …

Introduction. FGD (flue gas desulfurization) gypsum (calcium sulfate dihydrate, CaSO 4 ·2H 2 O) is the main product of desulfurization system for the removal of SO x at fossil-fuel power plants. One of the well known application of waste gypsum is the production of the fertilizer ammonium sulfate ((NH 4) 2 SO 4) [1], [2], [3]: CaSO 4 ⋅ 2 H 2 …

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

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 …

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 …

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 …

For the 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 limestone is systematically analyzed. The properties of carbide slag and limestone have been analyzed, and the mass transfer and reaction behaviors in …

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

Calcium carbonate (CaCO3) is divided into precipitated calcium carbonate (PCC) synthesized through chemical precipitation and ground calcium carbonate (GCC) …

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

Process compatible desulfurization of NSP cement production: A novel strategy for efficient capture of trace SO2 and the industrial trial. ... Characterization of direct reduced iron for reduction and elimination of sulfur using calcium carbonate. Journal of the Korean Ceramic Society 2020, 57 (1), ... foundry sand dust and Waelz slag. Journal ...

In contrast to the CS, the peak intensity of Ca(OH) 2 is slightly reduced in the KCS, and calcium carbonate (CaCO 3) phase also appears. ... Synergetic utilization of microwave-assisted fly ash and carbide slag for simultaneous desulfurization and denitrification: high efficiency, low cost and catalytic mechanism. Chem Eng J, 437 ...

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 …

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.

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.

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.

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 ...

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 …

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 …

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 …

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 ...

Preparation of calcium carbonate nanoparticles from waste carbide slag based on CO2 mineralization. May 2022. Journal of Cleaner Production 363:132463. …

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 ...

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 with PG desulfurization slag, which mainly contains two steps: leaching and carbonizing. In this work, we concentrated on the former, in …

Climate change is urgently calling for rapid methods to capture atmospheric carbon dioxide (CO 2).CO 2 can be sequestred into gypsum from gas desulfurization by carbonation to produce calcium carbonate (CaCO 3).However, CaCO 3 is produced as a mixture of polymorphs including calcite and vaterite polymorphs, which limits …

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 ...

with carbon dioxide to prepare calcium carbonate has been studied in the early stage. The main point of this ... and the calcium content in desulfurization slag is as high as 42.33% while the ...

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 …