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Characterization and gravimetric analysis of the dissolved quartz in the conversation of coal fly ash to solidate

Mohamed, Mohd Hilmi and Ramli, Zainab (2011) Characterization and gravimetric analysis of the dissolved quartz in the conversation of coal fly ash to solidate. In: 24th Malaysian Symposium Of Analytical Sciences (SKAM™- 24).

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Abstract

Coal fly ash (CFA) is a waste product produced from the electrical power plant and hazardous towards the environment. However, the high composition of silica and alumina in the CFA makes it useful as raw materials in the zeolite synthesis. However, the presence of silica in the form of quartz in the CFA does not facilitate the transformation of CFA to zeolite at 100 degree Celsius and autogeneous pressure. In this study, CFA was converted to zeolites in various NaOH concentrations by microwave heating at various heating time. All synthesized product were characterized by X-ray diffraction (XRD), and gravimetric analysis. XRD has shown that quite pure sodalite in nano size has been formed as early as 15 minutes and increase with time. Prolong heating up to 45 minutes has reduced the content of quartz to ca 20 %. Gravimetric analysis performed on the liquor of the reaction showed that the dissolved silica decrease with increase of heating time indicating that most of the dissolved quartz is used up to form sodalite framework. Hence, quartz of CFA did help in enhancing the crystallinity of the formed sodalite after prolong heating.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:COAL, FLY ASH, GRAVIMETRIC ANALYSIS, QUARTZ, SOLUTES Descriptors (DEC)AEROSOL WASTES, ASHES, CARBONACEOUS MATERIALS, CHEMICAL ANALYSIS, COMBUSTION PRODUCTS, ENERGY SOURCES, FOSSIL FUELS, FUELS, MATERIALS, MINERALS, OXIDE MINERALS, QUANTITATIVE CHEMICAL ANALYSIS, RESIDUES, WASTES
Subjects:Q Science > Q Science (General)
Divisions:Science
ID Code:45651
Deposited By: Haliza Zainal
Deposited On:10 Jun 2015 03:01
Last Modified:30 Jul 2017 06:59

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