Zeolitization characteristics of fly ash and its use to manufacture porous materials
Journal Title: Archives of Materials Science and Engineering - Year 2018, Vol 2, Issue 90
Abstract
Purpose: At thermal power plants the fly ash (FA) is stored either through dry or wet disposal systems. These storage practices result in different features for fly ashes, such as their interaction with alkalis and hence the potential of zeolite synthesis will be different. With the aim to demonstrate this, it was conducted some investigations to study the physical, chemical, morphological and mineralogical characteristics of the fly ash residues, then were used to synthesis zeolites by a double stage fusion-hydrothermal method. Design/methodology/approach: The raw and converted fly ash samples were characterized with respect to their composition, crystallinity and morphology, by SEM and XRD analysis. The effects of environment conditions and process parameters on the zeolitization process were studied and analysed. Findings: The analysis of these residues showed that dry ash attains a high cation exchange capacity (CEC) and SiO2 /Al2O3 ratios, which is in agreement to the formation of fly ash zeolites as compared to its counterpart. The experimental results indicate that the fusion temperature does not influence on the synthesis mechanism in range of 500-800 (°C) having only an effect of acceleration. The increasing of alkaline activator/fly ash ratio enhances the zeolitization degree. Research limitations/implications: The scientific basis for the issues on the zeolitization characteristics of fly ash and its use to manufacture porous materials calls yet for further elucidation and development. Practical implications: This study helps to establish the superiority of dry ash over wet ash for synthesizing porous materials and their enhanced quantity and quality. Originality/value: A new route for the fly ash use is demonstrated and this can become an unavoidable task for porous material manufacturing, a viable way to manage this industrial waste and to protect the environment.<br/><br/>
Authors and Affiliations
E. David, C. Şandru, A. Armeanu
Keywords
Related Articles
- EP ID EP346414
- DOI 10.5604/01.3001.0012.0663
- Views 144
- Downloads 0
Formulation and evaluation of TiO[sub]2[/sub].Fe[sub]2[/sub]O[sub]3[/sub] nanopaint
Purpose: In this project, the formulation of TiO[sub]2[/sub].Fe[sub]2[/sub]O[sub]3[/sub] nanopaint was discussed.Design/methodology/approach: The paint was formulated in alkyd resin using ball milling process. I...
Parametric optimization of MIG welding on 316L austenitic stainless steel by Taguchi method
Purpose: Taguchi design has been adopted in order to identify optimal parametric combination for desired quality of weld. Design/methodology/approach: A plan of experiments based on Taguchi technique h...
Numerical analysis of the cavitation effect occurring on the surface of steel constructional elements
Purpose: The aim of the work is to present the results of own investigations concerning the geometric optimisation of constructional elements working in the environment of cavitation wear together with a computer numeric...
Conventional synthesis and characterization of rare earth doped barium borophosphates, BaBPO5:RE (Y, Gd and La)
Purpose: of this research, our target is synthesis and characterization of rare earth metalssuch as Y, Gd and La doped barium borophosphate compounds which are applicable innon-linear optics industry.Design/methodology/a...
Carbon based coatings for applications in friction couples with bearing steel and aluminium alloy
Purpose: Low friction nc-WC/a-C:H coatings deposited by means of magnetron sputtering provide very good tribological properties in friction couple against hard steels and good adhesion to steel substrates. Nevertheless,...