Optimization of pelleting parameters for producing composite pellets using zeolitic material from fly ash

Abstract

: Zeolitic material in powder form was prepared from y ash by direct activation treatment. e y ash-based zeolite was pelletizing using different inorganic (calcium hydroxide, bentonite, kaolinite) and organic (dextrin) binders with varying percentage. e aim of this study was to produce granular zeolitic material for application in wastewater treatment. e zeolitic materials were analyzed by XRF, XRD, SEM, FTIR, TG-DTG and Nitrogen adsorption/desorption isotherm. Compression and impact tests were used to evaluate the deformation and breakage behaviour of spherical granules. e best performance was obtained by zeolite granular containing 5 wt.% bentonite and 5 wt.% kaolinite with mechanical strength and satisfactory water resistance. e synthesis of pelletized zeolite from by-products derived from coal combustion provides not only environmental and economic benets, but also contributes to achieving the principles of sustainable development.