Improvement in hydrocracking activity of heavy oil upgrading catalyst by modifications to some specific properties of Y-zeolite
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We have been developing zeolite catalysts for fixed-bed resid hydrodesulfurization (HDS) units. The catalysts, named R-HYC, show high resid hydrocracking (HYC) activity by increasing middle distillates and concurrently decreasing bottom fuel oil. To meet refinery demands for lower catalyst cost and improved HYC activity, the newest R-HYC has been developed as R-HYC12, showing more than twofold improved HYC activity compared with the previous R-HYC10, by means of modifications to some specific properties of Y-zeolite. A new sequence combining the developed R-HYC12 with the other, hydrodemetallization (HDM) and HDS catalysts has been proposed to achieve the best resid HDS unit performance.
KeywordsHeavy oil upgrading Hydrocracking (HYC) HDS Zeolite Modifications
This work was supported by the Japan Petroleum Energy Center (JPEC) under a subsidy of the Japanese Ministry of Economy, Trade, and Industry (METI).
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