Estimation of trace elements in fly ash released from coal combustion

OALib ◽  
2014 ◽  
Vol 01 (01) ◽  
pp. 1-11 ◽  
Author(s):  
Ali Eltayeib
Keyword(s):  
Trace Elements ◽  
Fly Ash ◽  
Coal Combustion

scholarly journals Estimation of Trace Elements in Fly Ash Released from Coal Combustion

OALib ◽  
2014 ◽  
Vol 01 (03) ◽  
pp. 1-13
Author(s):  
Ali A. Eltayeib
Keyword(s):  
Trace Elements ◽  
Fly Ash ◽  
Coal Combustion

Study of the concentration of trace elements in fly‐ash resulting from coal combustion

1992 ◽  
Vol 13 (10) ◽  
pp. 995-1000 ◽  
Author(s):  
E.C. Teixeira ◽  
J.C. Samama ◽  
A. Brun
Keyword(s):  
Trace Elements ◽  
Fly Ash ◽  
Coal Combustion

scholarly journals A Role of Mineral Oxides on Trace Elements Behavior during Pulverized Coal Combustion

Minerals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1270
Author(s):  
Ulung Muhammad Sutopo ◽  
Erda Rahmilaila Desfitri ◽  
Yukio Hayakawa ◽  
Shinji Kambara
Keyword(s):  
Trace Elements ◽  
Fly Ash ◽  
Trace Element ◽  
Coal Combustion ◽  
Thermodynamic Calculation ◽  
Environmental Pollutant ◽  
Pulverized Coal Combustion ◽  
Good Relationship ◽  
Mineral Oxides

The issues of trace element emissions during coal combustion has been a concern in recent years due to their environmental pollutant. To study the trace element transformation, the thermodynamic calculation (FactSage 7.2) was used. Five kinds of pure mineral oxides (Al2O3, CaO, Fe2O3, K2O, and MgO) and As, B, Cr, F, and Se in fly ash were considered for trace elements. The results confirm that all mineral oxides have a good correlation with arsenic to form Ca3(AsO4)2, FeAsO4, K3AsO4, and Mg3(AsO4)2. Boron has a good relationship with Al, Ca, and Mg to form (Al2O3)9(B2O3)2, Ca3B2O6, and Mg3B2O6. Chromium has a good correlation with K and Ca to form K2CrO4, CaCr2O4. Furthermore, FeF3(s) KF(s), and AlF3(s) are predicted from the interaction of fluorine with Fe2O3, K2O, and Al2O3. The effect of mineral oxides on selenium partitioning are not observed. The inhibition order of trace elements by mineral oxides is as follow: As (Al2O3 > MgO > CaO > Fe2O3 > K2O), B (Al2O3, CaO, Fe2O3, K2O, > MgO), Cr (CaO > K2O > Al2O3, MgO, Fe2O3), F (CaO > MgO > Al2O3 > Fe2O3 > K2O). The results will be useful to control the trace element emissions.

In-situ reaction between arsenic/selenium and minerals in fly ash at high temperature during blended coal combustion

2020 ◽  
Vol 48 (11) ◽  
pp. 1356-1364
Author(s):  
Jun HAN ◽  
Yang-shuo LIANG ◽  
Bo ZHAO ◽  
Zi-jiang XIONG ◽  
Lin-bo QIN ◽  
...  
Keyword(s):  
High Temperature ◽  
Fly Ash ◽  
Coal Combustion ◽  
In Situ Reaction ◽  
Blended Coal

scholarly journals Preparation of Synthetic Zeolites from Coal Fly Ash by Hydrothermal Synthesis

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1267
Author(s):  
David Längauer ◽  
Vladimír Čablík ◽  
Slavomír Hredzák ◽  
Anton Zubrik ◽  
Marek Matik ◽  
...  
Keyword(s):  
Fly Ash ◽  
Coal Combustion ◽  
Power Plants ◽  
Coal Fly Ash ◽  
Thermal Power ◽  
Product Analysis ◽  
Coal Combustion Products ◽  
X Ray ◽  
Wide Range ◽  
Silica Alumina

Large amounts of coal combustion products (as solid products of thermal power plants) with different chemical and physical properties cause serious environmental problems. Even though coal fly ash is a coal combustion product, it has a wide range of applications (e.g., in construction, metallurgy, chemical production, reclamation etc.). One of its potential uses is in zeolitization to obtain a higher added value of the product. The aim of this paper is to produce a material with sufficient textural properties used, for example, for environmental purposes (an adsorbent) and/or storage material. In practice, the coal fly ash (No. 1 and No. 2) from Czech power plants was firstly characterized in detail (X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX), particle size measurement, and textural analysis), and then it was hydrothermally treated to synthetize zeolites. Different concentrations of NaOH, LiCl, Al2O3, and aqueous glass; different temperature effects (90–120 °C); and different process lengths (6–48 h) were studied. Furthermore, most of the experiments were supplemented with a crystallization phase that was run for 16 h at 50 °C. After qualitative product analysis (SEM-EDX, XRD, and textural analytics), quantitative XRD evaluation with an internal standard was used for zeolitization process evaluation. Sodalite (SOD), phillipsite (PHI), chabazite (CHA), faujasite-Na (FAU-Na), and faujasite-Ca (FAU-Ca) were obtained as the zeolite phases. The content of these zeolite phases ranged from 2.09 to 43.79%. The best conditions for the zeolite phase formation were as follows: 4 M NaOH, 4 mL 10% LiCl, liquid/solid ratio of 30:1, silica/alumina ratio change from 2:1 to 1:1, temperature of 120 °C, process time of 24 h, and a crystallization phase for 16 h at 50 °C.

Distribution characteristics and migration patterns of hazardous trace elements in coal combustion products of power plants

Fuel ◽  
2019 ◽  
Vol 258 ◽  
pp. 116062 ◽  
Author(s):  
Jinxi Wang ◽  
Zhen Yang ◽  
Shenjun Qin ◽  
Balaji Panchal ◽  
Yuzhuang Sun ◽  
...  
Keyword(s):  
Trace Elements ◽  
Coal Combustion ◽  
Power Plants ◽  
Combustion Products ◽  
Distribution Characteristics ◽  
Migration Patterns ◽  
Coal Combustion Products ◽  
Hazardous Trace Elements ◽  
And Migration

Modelling of pulverized coal combustion with respect to fly ash particle size distribution

Fuel ◽  
1990 ◽  
Vol 69 (6) ◽  
pp. 690-695 ◽  
Author(s):  
Luis Can̄adas ◽  
Luis Salvador ◽  
Vicente Cortés
Keyword(s):  
Particle Size ◽  
Fly Ash ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Coal Combustion ◽  
Pulverized Coal ◽  
Pulverized Coal Combustion
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