Effect of Ultrasonic Pre-Treatment Durations on the Formation of Zeolite-T

Abstract

In the present work, the lengthy synthesis duration of zeolite-T was successfully reduced by inducing the ultrasonic pre-treatment method prior to hydrothermal growth. The effect of ultrasonic pre-treatment durations on the formation of zeolite-T was investigated. The structure and morphology of the resultant samples were characterized by FTIR, XRD and FESEM. As verified by FTIR, samples produced using synthesis durations of 5, 4, 3 and 2 days with ultrasonic pre-treatment durations of 60 min and 90 min, respectively, demonstrated zeolite-T structure. One day synthesis duration was not sufficient for the formation of zeolite-T. From the results obtained by XRD and FESEM, it was found that samples underwent 60 min ultrasonic pre-treatment produced zeolite-T with higher crystallinity, while no significant changes on the morphology of the resultant zeolite-T synthesized using ultrasonic pre-treatment durations of 60 min and 90 min.

Zeolite RHO Synthesis Accelerated by Ultrasonic Irradiation Treatment

“…Askari and Halladj 19 successfully produced fully crystalline smaller-sized SAPO-34 crystals in 1.5 hours via sonochemical-assisted hydrothermal synthesis compared to 24 hours of conventional hydrothermal synthesis. High crystallinity of zeolite T particles were also successfully produced by Wahab and Yeong 20 where the synthesis duration was shortened from 7 days to 2 days with 60 minutes of ultrasonic irradiation treatment.…”

Accelerated synthesis of deca-dodecasil 3 rhombohedral (DDR3) zeolite crystals via hydrothermal growth coupled with ultrasonic irradiation method

“…They successfully reduced the synthesis duration from 7 days (168 h) to 2 days (48 h). 28 From all above successful cases, it can be concluded that ultrasonic irradiation can signicantly reduce the synthesis duration of zeolites. Table 1 shows the ultrasonic irradiation and hydrothermal heating effect on the synthesis durations of zeolites reported by various researchers.…”