LAUSR

The present work reports the synthesis of beta zeolite and its modification with phosphorous in different percentages of P2O5 (1 and 5%) and vacuum gas oil (VGO) hydrocracking (HCK) conversion and yield to naphtha and middle distillates. The solids were characterized by X-ray diffraction, elemental analysis by atomic absorption spectroscopy and inductively coupled plasma atomic emission spectrometry (ICP-AES), N2 adsorption, 27Al magic angle spinning-nuclear magnetic resonance (27Al-MAS-NMR), temperature-programmed desorption of ammonia (NH3-TPD) and isopropylamine (IPam-TPD), pyridine adsorption followed by Fourier transform infrared spectroscopy (Py-FTIR), hydrogen temperature-programmed reduction, transmission electron microscopy, and energy-dispersive X-ray (TEM–EDX). The catalysts were tested in a tubular reaction system at 350 °C, 10 342 kPa, H2/feed: 1250 NL/L, LHSV: 1 h–1 with prehydrotreated VGO. Overall activity and middle distillates and naphtha yields were influenced by the phosphorous impregn...