Abstract
The study examines the technology of processing fly ash from Troitskaya power plant for the production of zeolite. The paper presents the results of laboratory studies evaluating the suitability of fly ash from Troitskaya power plant for the production of zeolites and the development of the zeolite production process. Fly ash contains a small amount of heavy metals that can complicate processing, but contains a large amount of silicon oxide. The technology consists of high-temperature alkaline activation of fly ash and hydrochemical synthesis. The resulting powder has a specific surface area of 89.7 m2/g, determined by the BET method, and an average pore diameter of 0.345 μm. The static exchange capacity was 220 mg/g.
Highlights
Thermal power plant residues are divided into the fly ash, collected on electrostatic air cleaner, and slag formed under the combuster
The total content of silicon oxide in ash is 55.2%, and of aluminum oxide - 26.8%, based on which, the ash can be classified as high-silica
The obtained results are in good agreement with the data of [5]
Summary
Thermal power plant residues are divided into the fly ash, collected on electrostatic air cleaner, and slag formed under the combuster. Due to physical and chemical properties (small powdery particles of spherical shape, often hollow), fly ash is widely used in the production zeolites Their use may be limited by the high content of toxic metals [1]. The main components of fly ash are silicon oxides, aluminum, iron, calcium, potassium, sodium and titanium, the main content of which in all ash is 50-60% SiO2, 20-30% Al2O3, 5-10% Fe2O3 [2,3]. Such composition makes the ash an attractive raw material for the production of sorption materials such as zeolites
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