Abstract
In this study, both zeolites NaA and NaY were synthesized from rice husk ash (RHA) by a simple conventional hydrothermal route. Rice husk (RH) was used as a silicate source to produce various zeolites. The hydrothermal route was conducted via a seeding technique involving the preparation of two separate gels, i.e. colloidal seed and feedstock gel. The zeolite was first produced using commercially available chemicals and followed by the replacement of the commercial silicate sources with RHA derived silicate. The RHA silicate was obtained by combusting the RH at different temperatures and durations i.e. 450 °C for both 2 and 6 hours, as well as 750 °C for 6 hours. Zeolite NaY (faujasite) was successfully synthesized with commercial chemical seed and RHA derived feedstock gel. On the other hand, using RHA silicate in both colloidal seed and feedstock gel would give only zeolite NaA. Elemental, structural and morphological analyses of RHA and zeolites were carried out with X-ray fluorescence (XRF) spectrometer, X-ray diffractometer (XRD) and scanning electron microscopy (SEM).
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Abbreviations
- RH::
-
rice husk
- RHA::
-
rice husk ash
- NaOH::
-
sodium hydroxide
- NaAlO2::
-
sodium aluminate
- Na2SiO3::
-
sodium silicate
- PTFE::
-
Polytetrafluoroethylene
- XRF::
-
X-ray fluorescence
- LOI::
-
loss on ignition
- XRD::
-
X-ray diffractometer
- SEM::
-
scanning electron microscope
- EDS::
-
energy dispersive spectrometer
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Tan, WC., Yap, SY., Matsumoto, A. et al. Synthesis and characterization of zeolites NaA and NaY from rice husk ash. Adsorption 17, 863–868 (2011). https://doi.org/10.1007/s10450-011-9350-6
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DOI: https://doi.org/10.1007/s10450-011-9350-6