Zeolite synthesis from coal ash using ultrafine-bubble-containing solution

Abstract

Zeolite synthesis from coal ash was investigated using a solution containing ultrafine bubbles in a system with a production capacity of 60 kg/batch as a prototype for actual production. The formation of zeolite P was enhanced by the presence of ultrafine bubbles in the reaction solutions. Cation exchange capacities of about 2.3 mol/kg were obtained with a treatment time 4 h at 98 °C. The accelerated formation of zeolite P from coal ash in the ultrafine-bubble-containing solutions was responsible for the high cation exchange capacities.