DOI: https://doi.org/10.9767/bcrec.13.3.2570.543-552

The Effect of Aluminum Source on Performance of Beta-Zeolite as a Support for Hydrocracking Catalyst

Catalysis Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran, Islamic Republic of

Received: 25 Apr 2018; Revised: 22 Jul 2018; Accepted: 29 Jul 2018; Available online: 14 Nov 2018; Published: 4 Dec 2018.
Editor(s): Istadi Istadi
Open Access Copyright (c) 2018 by Authors, Published by BCREC Group under http://creativecommons.org/licenses/by-sa/4.0.
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Abstract

In this paper, three different kinds of aluminum sources (sodium aluminate, aluminum sulfate and aluminum isopropylate) were used for preparing of nano beta-zeolite. The as synthesized zeolites were mixed with the as prepared amorphous silica-alumina to produce the supports for hydrocracking catalyst. The prepared supports were used for preparation of NiMo/silica alumina-nano beta-zeolite by impregnation method. The influence of the aluminum source for preparation of beta-zeolite on the performance of the prepared catalysts has been studied. The samples were thoroughly characterized by X-Ray diffraction method (XRD), field emission-scanning electron microscopy (FE-SEM), N2 adsorption-desorption isotherms (BET), temperature programmed desorption (TPD) and temperature programmed reduction (TPR) methods. The catalysts performance was evaluated by vacuum gas oil (VGO) hydrocracking at 390 oC in a fixed bed reactor. The XRD patterns showed that the beta-zeolite samples obtained from the present methods were pure and highly crystalline and the crystal size of the prepared zeolites were in nanometer scale. Crystallite size of nano beta-zeolite synthesized by aluminum isopropylate [Al(iPrO)3] was smaller than those of prepared by the other aluminum sources. The catalyst containing this zeolite with higher surface area (231 m2/g) and more available acid sites (1.66 mmol NH3/g) possessed higher activity and selectivity to gas oil (71.9 %). 

Keywords: Hydrocracking; Nano Beta-Zeolite; Aluminum Isopropylate; Aluminum Sources

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Section: Original Research Articles
Language : EN
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