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Title
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A new approach for synthesis of well-crystallized Y zeolite from bentonite and rice husk ash used in Ni-Mo/Al2O3-Y hybrid nanocatalyst for hydrocracking of heavy oil
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Type
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JournalPaper
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Keywords
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Bentonite Rice husk ash Y zeolite Hydrocracking Hydrodesulfurization
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Abstract
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A series of Ni-Mo/Al 2O 3-Y hybrid nanocatalysts were synthesized for hydrocracking of heavy oil. The well crystallized Y zeolite was synthesized from mineral bentonite and rice husk ash by a two-step synthesis method. The solution combustion method was applied to develop a fast and simple technique for prepar-ing of alumina-supported NiMo catalyst with high hydrodesulfurization activity. Such activity may be due to the morphological and textural modification as a consequence of the release of a high amount of exhaust gases during the combustion process. The XRD analysis revealed that the P zeolite was a com-petitive phase presented in the obtained product that could be eliminated using a two-step synthesis method. Compared to a one-step method, the pore volume and external surface area of the synthesized zeolite by the two-step method increased by 74 and 62%, respectively. The hydrocracking results illus-trated that the synthesized zeolite was able to convert 66% of heavy oil to lighter products and reduce the viscosity up to 60%. Furthermore, the amount of sulfur removal was found to be 58%. The spent cat-alyst characterization suggested that the type of deposited coke was hard coke with the unsaturated aro-matic ring which could be respo nsible for the pores blockage after the cracking reaction
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Researchers
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Ramin Karimzadeh (Third Researcher), Reza Khoshbin (Second Researcher), Roya Hamidi (First Researcher)
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