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Europe PMC is an archive of life sciences journal literature. In order to reduce the environmental impact due to land disposal of oil fly ash from power plants and to valorize this waste material, the removal of vanadium was investigated using leaching processes (acidic and alkaline treatments), followed by a second step of metal recovery from leachates involving …
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Recovery of vanadium and nickel from an oil fly ash is studied in a two-step leaching process, carried out under ambient pressure without calcination. In the leaching, nickel is dissolved with NH 4 Cl in the first step, followed by vanadium leaching with Na 2 CO 3 in the second step.
@misc{etde_633818, title = {A study of the extraction of vanadium and nickel in oil-fired fly ash} author = {Tsai, Shang-Lin, and Tsai, Min-Shing} abstractNote = {Annual production of oil-fired fly ash in Taiwan is approximately 43 000 tons, of this approximately 13 000 tons is electrostatically precipitated, the rest is cyclonically collected. . Structurewise, both consist of porous unburned ...
Bioleaching is a promising environmentally friendly approach for the recovery of V and Ni through using appropriate bacteria and fungi. After leaching, V and Ni compounds are …
A large number of studies have been carried outon the extraction of vanadium using ash from thermal power plants as a raw material [11][12][13][14] [15] [16] and few research is devoted the study ...
Increasing research activity is mostly observed in traditional areas: metal extraction from fly ash and the reduction of metals from the ash to V–Fe and Ni–Fe alloys. Bioengineering approaches to recover vanadium from ashes are also actively developed and have the potential to become commercially viable in the future.
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If electrostatically precipitated fly ash was leached in a solution of 0.25 N ammonia water and 2 N ammonium sulfate, it would yield an extraction of 60% nickel and 8% vanadium—leading to a ...
Extraction and separation of vanadium and nickel from fly ash ... EN English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian český русский български العربية Unknown
The current research examined the extraction of germanium, vanadium, and lithium from coal fly ash (CFA) using a sequential sodium salt roasting and organic acid leaching process. To this end, three sets of experiments were performed. In all experiments, CFA was roasted with salt at 850 °C and then leached with an organic acid.
Alavi, Bioleaching of metals from cellphones batteries by a co-fungus medium in presence of carbon materials, Bioresour. Technol. Reports, № 15
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Vanadium Extraction from Fly Ash—Preliminary Study of Leaching, Solvent Extraction, and Sorption on Chitosan ... 2 Hangzhou Zhengguang Chemical Company of China V(V) in an industrial leaching ...
Under these conditions, the extraction of vanadium can reaches 98%. Keywords vanadium, heavy fuel, fly ash, leaching, extraction 1. Introduction The power generation station that uses heavy oil produces a solid residue called fly ash [1]. Fly ash generated during oil combustion. Fly ash is rich in Ni, V, Fe, Mo, Mg, Na and C and among these metals
The aim of this report is to determine the most effective conditions for a continuous solvent extraction circuit for the recovery of the vanadium component in fly ash derived from oil burning.
In order to extract nickel and vanadium from heavy oil fly ash Tokuyama [5] investigated a process with two different steps; leaching and ion exchange. At leaching process by using water and acid solution Ni, Mg, Al, V and Zn were …
Fly ash is a powdery material produced during the purification of iron. ... of iron and vanadium. It can be used in place of pure vanadium in making alloys. Ferrovanadium saves companies the cost of making pure vanadium metal. Isotopes Two naturally occurring isotopes of vanadium exist, vanadium-50 and vanadium-51. ... Extraction Vanadium can ...
In order to reduce the environmental impact due to land disposal of oil fly ash from power plants and to valorize this waste material, the removal of vanadium was investigated using leaching processes (acidic and alkaline treatments), followed by a second step of metal recovery from leachates involving either solvent extraction or selective precipitation.
Request PDF | On Jun 7, 2024, M Baritto and others published Life cycle GHG emissions assessment of vanadium recovery from bitumen-derived petcoke fly ash | Find, read and cite all the research ...
Vanadium recovery from oil fly ash by leaching, precipitation and solvent extraction processes ... However, regulations imposed in many countries require companies to process the waste materials in order to recover the valuable materials and avoid the dissemination of toxic products. Many studies have focused on the recovery of vanadium from ...
Semantic Scholar extracted view of "A study of the extraction of vanadium and nickel in oil-fired fly ash" by Shang-Lin Tsai et al. ... Abstract In the current project, V 2 O 5 extraction from fuel fly ash was carried out, and the advanced extraction method was investigated. This reduced the percentage of industrial fuel fly ash … Expand. 4.
Extraction and separation of vanadium and nickel from fly ash produced in heavy fuel power plants
Extraction and separation of vanadium (V) and nickel (Ni) from FA is achieved using Akita's procedure with some modifications. In the first step, Ni is selectively eluted from …
IGCC fly ash samples in the same extraction conditions (25 o C, water/fly ash ratio of 10 L/kg and 24 h leaching period) revealed that generally Ge yielded a lower extraction percentage (40 -50 %) at high limestone dos ages (4 %) than reached (53 -91 %) when
For fly ash that produced from fuel burning, the main non-process elements are V, Ni and Mg, the first two elements come with fuel and the latter one is added to fuel as Mg(OH) 2 in order to prevent fuel fouling upon burning [8]. Other common heavy metals like Fe, Mn, Co, and Al are originated from the corrosion of the process equipment that ...
Extraction and separation of vanadium and nickel from fly ash produced in heavy fuel power plants ... Reducing Environmental Pollution of Fuel Fly Ash by Extraction and Removal Vanadium Pentoxide. Mina Alikhani. Solid Fuel Chemistry, 2020 ... Central Electricity Generating Company, The Hashemite Kingdome of Jordan, Annual Report, 2010. [2]
Heavy fuel oil is used in power production and water desalination plants, which results in producing large amounts of flyash that needs to be utilized or at least managed properly. If disposed in landfills, heavy fuel oil flyash (HFOF) may have detrimental effects on surrounding environments, particularly, ground and surface waters. Therefore, HFOF must be subjected to …
Increasing research activity is mostly observed in traditional areas: metal extraction from fly ash and the reduction of metals from the ash to V–Fe and Ni–Fe alloys. Bioengineering approaches to recover vanadium …
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The properties of the fly ash used in this work, collected from the electrostatic precipitator of a power plant burning heavy oil, are reported in Table 1.The high carbonaceous fraction content (around 70%) of the sample makes a preliminary thermal treatment suitable for concentrating the inorganic fraction to be submitted afterwards to the vanadium recovery …
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Download scientific diagram | ]: The effects of NaOH concentration on extraction rate of fly ash leached (1 0 0 g /500 ml;temp.=30°C; time=2 h ) . from publication: Vanadium Extraction from ...
For each experiment, 1.00 g of coal fly ash was thoroughly mixed with 0.50 g of Na 2 CO 3, then transferred to ceramic crucibles and treated in a furnace for two hours at 850 • C in order to ...
Suncor's Alberta Vanadium Project (AVP) has a total expected investment cost of CA$36 million. It has two planned phases, the first to demonstrate that vanadium can be economically recovered from fly ash …
@article{osti_459129, title = {Characterization of fossil oil fly ash and the enrichment of the contained vanadium as V{sub 4}C{sub 3} by high-temperature treatment}, author = {Aurisicchio, C and Bardi, G and DeMaria, G}, abstractNote = {Extraction of vanadium compounds from fossil oil fly ash is discussed. Using EDS, ESCA, X-ray absorption, and atomic absorption …
Vanadium does not form concentrated deposits like other metals such as copper, nickel or zinc. It is widely dispersed in the Earth's crust, with V 3+ replacing Fe 3+ or Al 3+ in a number of minerals. Vanadium as V 3+ can substitute for Fe 3+ in magnetite (Wenk and Bulakh, 2004); vanadium(III) and iron(III) ions have near identical ionic radii in octahedral sites of …
The results of leaching fly ash in sodium hydroxide solutions of different concentrations is shown in Fig. 4.It can be seen that along with the increase in the concentration of sodium hydroxide, the pH of the leached EP fly ash increases from 8.7 to 12.9, and the extraction of vanadium increases from 2.6 to 45%.