Conversion of lignite fly ash into synthetic zeolite by hydrothermal, fusion‐hydrothermal, and hydrothermal‐sonochemical processes
Eleni Kastanaki,
Anastasia Rovithi,
Eleftheria Iatrou
et al.
Abstract:The purpose of this study was the conversion of calcareous lignite fly ash (LFA) into synthetic zeolite by hydrothermal, fusion‐hydrothermal and hydrothermal ‐sonochemical processes. Experiments were carried out using raw and washed (5 N HCl) fly ash. Initially, the fractional factorial experimental design was used to plan the hydrothermal experiments and assess the process parameters such as solid to liquid ratio (S/L), silica to aluminum oxide ratio (SiO2/Al2O3), calcium oxide content (% CaO), time and tempe… Show more
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