Effect of acidity and physical properties of nanozeolite catalyst on hydrocracking of vacuum gas oil

محورهای موضوعی : Iranian Journal of Catalysis

Mina Hadi ¹ (Catalysis Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran.)
Hamid Reza Bozorgzadeh ² (Catalysis Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran.)
Hamid Reza Aghabozorg ³ (Catalysis Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran.)
Mohammad Reza Ghasemi ⁴ (Faculty of Engineering and Technology, Tehran North Branch, Islamic Azad University, Tehran, Iran.)

تاریخ دریافت : 1398/01/27 تاریخ پذیرش : 1398/06/10 تاریخ انتشار : 1399/03/12

کلید واژه: Acidity, Hydrocracking, Beta nanozeolite, USY nanozeolite, Middle distillate,

چکیده مقاله :

In this study, beta nanozeolite, ultra-stable Y zeolite (USY) and amorphous silica-alumina (ASA) were synthesized. These compounds were used as the support of hydrocracking catalyst. Ni-Mo/beta zeolite-ASA and Ni-Mo/USY zeolite-ASA catalysts were prepared by the impregnation method. The samples were characterized with X-Ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), temperature programmed desorption (TPD) and BET methods. Catalytic behavior of these catalysts was evaluated on hydrocracking of vacuum gas oil at 400 and 55 bar in a fixed bed continuous microreactor. The XRD patterns of the prepared samples determined the phase structure of the samples. FE-SEM images of the nanozeolites indicated that the particle sizes of them are less than 10 nm. The results indicated that the catalyst containing USY with higher pore diameter and acidity was more useful in middle distillate products (87%), while the conversion of the catalyst containing beta zeolite was more than the other catalysts (44.8%).

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