Abstract
Coal fly ash (CFA) was transformed to Na-P zeolite (CFA-ZP) experimentally at atmospheric pressure and low temperature (∼100°C) via conventional hydrothermal heating followed by sonochemical energy in 4h. The synthesized products were characterized using XRD, TGA/DTA, SEM, PSD, and BET techniques and CEC method. The effect of ultra-sonication time on crystallinity of the synthesized zeolite was studied. Crystallinity of Na-P zeolite as high as 87% was achieved at the optimum experimental conditions of NaOH/CFA of 0.27 and 1h conventional heating followed by 3h ultrasound irradiation. Experimental results revealed that sonochemical treatment shortened the crystallization time from 24h to 4h. Increasing the conventional heating time and decreasing the ultra-sonication time resulted in a lower crystallinity of the synthesized zeolite.
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