STATISTICAL ANALYSIS OF ZEOLITE A AND Y SYNTHESIZED FROM AHOKO KAOLIN USING TWO DIFFERENT HYDROTHERMAL METHODS AND THE STUDY OF THEIR ION EXCHANGE CAPACITIES
Zeolite A and Y have been successfully synthesized using conventional and alkaline fusion methods
from Ahoko Kaolin. The percentage crystallinity of synthesised Zeolite A ranged from 22.52 to 30.70
% for samples synthesized by conventional hydrothermal method and from 28.74 to 43.35 % for those
synthesized by alkaline fusion route. Zeolite Y crystallinity ranged from 37.09 – 48.92 % and from
37.55 - 47.73 % for the conventional and alkaline fusion synthesized zeolite respectively. A replicated
23 factorial design was used to study the influence of three different variables (crystallization
temperature, crystallization time and ageing time) on the quality of the synthesized zeolites expressed
in terms of CEC. For zeolite A, the crystallization temperature is the most significant factor and the
interaction between the ageing time and crystallization temperature is less significant on the CEC.
While for zeolite Y, the ageing time is the most significant factor and the interaction between
crystallization time and ageing time is less significant. The average CEC for Zeolite A and Y samples
obtained by conventional and fusion method ranges between 264.32 – 585.75, 303.31 – 627.74,
239.32 – 585.74 and 287.31 – 600.75 meq/100 g respectively.