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Coal combustion by-products production in USA and EU is estimated in around 115 million tons per year. A large portion of this production is accounted for the coal fly ash (CFA). Cement and concrete manufacturing consumes most of the CFA produced. Zeolite synthesized from CFA is a minor but interesting product, with high environmental applications. Zeolites may be easily obtained from CFA by relatively...
This study focuses on the synthesis of zeolites from Spanish fly ashes at laboratory (g and kg sample size) and pilot plant (metric ton sample size) scales, and on the potential application of the synthesized zeolitic material. To this end, eleven Spanish fly ashes were selected and characterized in detail. A matrix of experimental parameters was built to optimize the synthesis of mono-mineral zeolite...
This study focuses on the mobility of water-soluble major and trace elements in six Spanish fly ashes using room temperature open and closed and heated (90 o C) closed leaching systems in an attempt to reduce the content of undesirable species in coal combustion by-products to increase their potential applications.The leaching trends of the trace impurities are consistent with the dissolution...
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