The preparation of amorphous RHA from rice husk through pretreatment with 10% H2SO4
successfully produced a highly amorphous RHA with low impurities and better yield
(95.8%). Zeolite Y is available in powder form and consequently rice husk ash was
suitable for synthesis of zeolite as it contains high percentage of amorphous silica form.
The objective to recycle waste material to produce a valuable product and a high quality
silica oxide was achieved. Preparation of zeolite Y with seeding yielded pure zeolite Y but
preparation of zeolite Y without seeding using silica gave the mixture of zeolite Y and
zeolite P. Meanwhile synthesis of zeolite Y using seed and feed gel method gave the
maximum crystallinity and rich in zeolite Y. Therefore in order to produce highly pure
zeolite Y with the absence of other impurities, seeding and ageing technique must be used
during the synthesis