Title :
Preparation of zeolitic compounds from high calcium fly ash
Author :
Temuujin, Jadambaa
Author_Institution :
Lab. of Mater. Sci. & Technol., Inst. of Chem. & Chem. Technol., Ulaanbaatar, Mongolia
Abstract :
Various zeolitic compounds such as faujasite-Na and sodium aluminum silicate hydrate have been synthesized from high calcium fly ash by a classical hydrothermal treatment. The composition of reaction mixtures was set with a Si:A ratio of 1 by adding a transition alumina to the fly ashes. NaOH solutions with 2 and 4 molar concentrations were used to dissolve the aluminosilicates in the fly ash and produce the conditions for zeolite crystallization. Zeolitic compounds have been prepared at 150°C and 200°C temperatures for 4-24 hrs.
Keywords :
aluminium compounds; crystal growth from solution; crystallisation; fly ash; sodium compounds; zeolites; Na3Al3Si3O12H2O; aluminosilicates; high calcium fly ash; hydrothermal treatment; reaction mixtures composition; sodium aluminum silicate hydrate; temperature 150 C; temperature 200 C; time 4 hr to 24 hr; transition alumina; zeolite crystallization; zeolitic compounds preparation; Aluminum oxide; Calcium; Compounds; Crystallization; Fly ash; Power generation; X-ray scattering; chemical composition; fly ash; hydrothermal synthesis; zeolites;
Conference_Titel :
Strategic Technology (IFOST), 2011 6th International Forum on
Conference_Location :
Harbin, Heilongjiang
Print_ISBN :
978-1-4577-0398-0
DOI :
10.1109/IFOST.2011.6020992
