[HTML][HTML] Recent processes for the production of alumina nano-particles

S Said, S Mikhail, M Riad - Materials Science for Energy Technologies, 2020 - Elsevier
Alumina nano-particles have wide usage in the adsorption and catalysis fields, because of
its acid-base properties, high specific area, mechanical and thermal stability. The first part of …

High-pressure HCl leaching of coal ash to extract Al into a chloride solution with further use as a coagulant for water treatment

D Valeev, I Kunilova, A Shoppert… - Journal of Cleaner …, 2020 - Elsevier
In the present paper a novel process of the coal ash treatment was developed and analyzed:
a high-pressure autoclave HCl leaching of the coal bottom and fly ash from an Omsk coal …

Leaching kinetics and reactivity evaluation of fly ash based on the synergistic effect of alkali and sulfate

H Wang, Y Wang, X Liu, Z Zhang - Journal of Building Engineering, 2023 - Elsevier
This work evaluates the reactivity of various minerals of fly ash based on the backscattered
electron images analysis (BSE-IA) method and discusses the influencing factors and kinetics …

Spent-medium leaching of germanium, vanadium and lithium from coal fly ash with biogenic carboxylic acids and comparison with chemical leaching

H Rezaei, SZ Shafaei, H Abdollahi, S Ghassa… - Hydrometallurgy, 2023 - Elsevier
Coal fly ash (CFA), produced in coal-fired power plants, is categorized as hazardous waste
and has caused serious environmental impacts. The CFA contains significant amounts of …

Kinetics study of al extraction from desilicated coal fly ash by NaOH at atmospheric pressure

A Shoppert, I Loginova, D Valeev - Materials, 2021 - mdpi.com
The most promising source of alumina in the 21st century is the coal fly ash (CFA) waste of
coal-fired thermal plants. The methods of alumina extraction from CFA are often based on …

High-end reclamation of coal fly ash focusing on elemental extraction and synthesis of porous materials

T Ju, S Han, Y Meng, J Jiang - ACS Sustainable Chemistry & …, 2021 - ACS Publications
Coal combustion accounts for a large proportion of the global energy supply due to its low
cost and high heat value; however, pollution from the large amounts of coal fly ash (CFA) …

Fe-Si alloys production and alumina extraction from coal fly ash via the vacuum thermal reduction and alkaline leaching

H Chen, W Yu, Z Jiang, W Jiang, P Wei… - Fuel Processing …, 2023 - Elsevier
The comprehensive utilization of coal fly ash (CFA) has attracted extensive attentions owing
to increasing awareness of environmental protection and secondary resource recycling. In …

Multi-element comprehensive utilization of high-silicon bauxite by roasting pretreatment and two-stage leaching

Y Li, X Pan, Z Lv, H Wu, H Yu - Minerals Engineering, 2022 - Elsevier
As a potential ore resource to produce alumina in industry, the complex symbiotic
relationship between the aluminum-, silicon-and iron-bearing minerals in the high-silicon …

Microwave-assisted pretreatment of coal fly ash for enrichment and enhanced extraction of rare-earth elements

GA Yakaboylu, D Baker, B Wayda, K Sabolsky… - Energy & …, 2019 - ACS Publications
A microwave-assisted pretreatment (beneficiation) technique was developed as an
approach to improve the enrichment and extraction of rare-earth elements from coal fly ash …

High purity alumina synthesised from iron rich clay through a novel and selective hybrid ammonium alum process

RA Pepper, G Perenlei, WN Martens, SJ Couperthwaite - Hydrometallurgy, 2021 - Elsevier
The demand for high purity alumina (HPA) has been steadily increasing due to its use in
advanced electronics and battery applications. This paper presents an innovative synthesis …