Study on the Chemical Composition of Coal Fly Ash as a Raw Material for Artificial Zeolite

• Published in: Journal of the Japan Society of Waste Management Experts Vol. 8; no. 6; pp. 280 - 287
• Main Authors: Meguro, Masaru, Haruna, Junsuke, Noda, Tamio, Kanamaru, Tatuya
• Format: Journal Article
• Language: Japanese
• Published: Japan Society of Material Cycles and Waste Management 1997
• Subjects: alkali treatment; cation exchange capacity; chemical composition; coal fly ash; zeolite
• ISSN: 1883-1648; 1883-163X
• DOI: 10.3985/jswme.8.280

Artificial zeolite (A.Z.) having a high cation exchange capacity (C.E.C) is formed by treating coal fly ash (fly ash), discharged from a coal-fueled power plant, with an alkali solution. This study was carried out to determine the chemical composition of fly ash suitable as a raw material for A.Z. and to establish the process conditions to form A.Z. having a high C.E.C. from fly ash. The results can be summarized as follows : (1) The C.E.C. of A.Z. depends on the non-crystalline Al2O3 content in flyash. (2) The C.E.C. of A.Z. and the non-crystalline Al2O3 content in fly ash increase as the content of Na2O+K2O and/or Al2O3 in the fly ash increase. (3) A.Z. with a the high C.E.C. is formed through the addition of a suitable Al resource in the process of treating fly ash with an alkali solution.