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access icon free Alkali-dissolving hydrothermal synthesis of zeolite P from fly ash

Zeolite P with the pseudo-spherical form was successfully synthesised from low-grade fly ash via alkali-dissolving hydrothermal synthesis method. These samples were characterised by X-ray diffraction, scanning electron microscope, X-ray fluorescence, Fourier-transform infrared spectroscopy, thermogravimetry-differential scanning calorimeter (TG-DSC) and Brunauer–Emmett–Teller. The textural properties of zeolite P were further studied by N2 adsorption–desorption technique. In addition, the TG-DSC study confirmed that the bound water content of zeolite P is 19.7% and the phase transition temperature of zeolite P is 400°C. Moreover, this thermal stability study approach not only extends the application of zeolite P but can be further extended to other zeolite materials as well.

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