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Catalytic Study of Hexadecane Cracking over Novel and Efficient HY/Al-HMS/K10 Hybrid Catalysts

The aim of this study is to provide a new and high-performance catalytic system for the cracking process by combining HY-zeolite, Al-hexagonal mesoporous molecular sieves (HMS) as a new matrix, and montmorillonite K10 as filler components. The Al-HMS molecular sieve was synthesized with different Si/Al molar ratios in the range of 2.5–35 and assembled with various amounts of HY-zeolite and montmorillonite K10 to prepare two- and three-component catalysts. After calcination, their catalytic activities were investigated in a cracking reaction of n-hexadecane at 500 °C and atmospheric pressure as a model reactant. The structure and surface properties of the synthesized catalysts were characterized by X-ray diffraction, scanning electron microscopy, Brunauer–Emmett–Teller, temperature-programmed desorption of NH3, and pyridine-IR techniques. Results indicated that the desired hybrid catalysts were successfully synthesized with the micro-mesoporous structures, high surface area, and suitable pore volume, and t...