Abstract
ABSTRACTNanosized sodalite octahydrate zeolite has been developed using a crystallization room temperature in the absence of organic templates. The best aging time found was 120 h and in this time the nanosized sodalite octahydrate zeolite is formed. The samples were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-Transform Infrared (FTIR) spectroscopy, x-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and N2 adsorption–desorption isotherm. The equilibrium adsorption capacities of pure gases CO2 and CH4 were measured at 298 and 308 K up to 20 bar on both powder and granules of sodalite octahydrate zeolite. With increasing temperature, the adsorption capacity decreases for both sodalite octahydrate zeolite powder and granules. The selectivity of CO2 at 308 K over CH4 was 6.53.
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