Abstract
Synthesis of hexagonal zeolite Y from Kankara kaolin using a split technique is presented. The technique entails splitting kaolin to alumina and silica components. These components were further recombined to synthesize zeolite Y. The as-synthesized NaY zeolite was transformed to REY zeolite. Characterizations of the as-synthesized zeolite Y were carried out using X-ray diffraction (XRD), X-ray fluorescence (XRF), Brunauer–Emmett–Teller (BET) texture analysis, scanning electron microscope (SEM), transmission electron microscope (TEM) and Fourier transform infrared (FTIR) spectroscopy. Catalytic desulfurization of the as-synthesized REY zeolite was studied using microwave assisted desulfurization of model diesel. The Si/Al molar ratio of the as-synthesized NaY zeolite was 4.27. The crystallinity of the as-synthesized NaY and REY zeolites were 79.1 and 56.5% respectively. The as-synthesized NaY and REY zeolites possessed hexagonal morphology with average crystal sizes of 200 and 100 nm respectively. The specific surface area, pore volume and pore diameter of the as-synthesized NaY zeolite were 732 m2 g−1, 0.2611 cm3 g−1 and 1.426 nm respectively. The specific surface area, pore volume and pore diameter of the as-synthesized REY zeolite were 456 m2 g−1, 0.1591 cm3 g−1 and 1.395 nm respectively. Zeolite Y synthesized using the split technique possessed physiochemical properties comparable to the commercial zeolite Y, it was also free of quartz and competing phase impurities reported in previous works. The as-synthesized REY zeolite resulted to 79% sulfur reduction when used as a catalyst in a microwave desulfurization of model diesel at 100 °C for 15 min.
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The authors gratefully acknowledge the financial and technical supports of Petroleum Development Trust Fund (PDTF), Abuja. Ahmadu Bello University, Zaria, Nigeria, and Sultan Qaboos University, Muscat, Oman.
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Salahudeen, N., Ahmed, A.S. Synthesis of hexagonal zeolite Y from Kankara kaolin using a split technique. J Incl Phenom Macrocycl Chem 87, 149–156 (2017). https://doi.org/10.1007/s10847-016-0686-0
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DOI: https://doi.org/10.1007/s10847-016-0686-0