COMPARATIVE ASSESSMENT OF SYNTHESIS OF ZEOLITE X FROM KANKARA AND ELEFUN KAOLINITE CLAY
Zeolite NaX was successfully synthesized from both Kankara and Elefun kaolinite clay. Both clays were wet beneficiated, calcined at 850oC for six hours, to obtain a more reactive metakaolin. The metakaolin was dealuminated using 60wt% tetraoxosulphate (VI) acid for three minutes, washed to neutrality before the introduction of calculated amount of NaOH. The resulting gels were aged for seven days at room temperature and subjected to crystallization temperature of 100oC for reaction times of 6, 12, 24 and 36 hours, respectively. The samples and products were characterized using XRF, XRD, SEM and BET. The XRF analysis confirmed the status of the raw materials and gave a positive indication of the pretreatment and zeolitization processes. The highest intensity value from XRD was recorded for zeolite NaX at 24hrs reaction time, while the SEM and BET for products at 36hrs tends to be more desirable. The zeolite NaX from Kankara and Elefun obtained at 1000C at 36hrs had an octahedral shape, highly crystalline in nature, having a specific surface area of about 479m2/g and 468 m2/g, respectively. The investigated characteristic properties tend to favorably compete with her commercial NaX (specific surface area-SSA of 423.6 m2/g).