Author/Authors :
Moriyama، نويسنده , , Ryo and Takeda، نويسنده , , Shohei and Onozaki، نويسنده , , Masaki and Katayama، نويسنده , , Yukuo and Shiota، نويسنده , , Kouji and Fukuda، نويسنده , , Tomoya and Sugihara، نويسنده , , Hiroaki and Tani، نويسنده , , Yuichi، نويسنده ,
Abstract :
A new process for converting coal fly ash to an artificial zeolite is described. The process is comprised of a high-temperature operation and water removal during the operation. Suitable operation parameters of the process were investigated using a test unit, and the optimal conditions were found to be 2.5–3.5 mol/dm3 of NaOH and 0.88–1.10 dm3/kg of liquid/solid, sodium hydroxide charge from 2.2 to 3.9 mol/kg-CFA. The zeolites obtained from a pilot plant had a higher cation exchangeable capacity than those from the test unit and were comparable to zeolites prepared using a conventional method.
