Synthesis and Characterization of Nano-Sized Pt/HZSM–5 Catalyst for Application in the Xylene Isomerization Process

摘要: The xylene isomerization is a well-established process in the aromatic-based petrochemical complex. This aims to convert ethylbenzene (EB), meta- and ortho-xylene para-xylene (PX). Active metal such as platinum (Pt) on zeolite support commonly used catalyst for reactions. Different catalysts with different acidic strength of (Si/Al ratios = 32, 50, 150) are synthesized this study. physical chemical properties characterized using X-ray diffraction (XRD), inductively coupled plasma (ICP), Brunauer, Emmett, Teller (BET) surface area analyses. Then, effect types operating parameters temperature (370, 375, 380, 385 °C), hydrogen partial pressure (2.4, 2.6, 2.8, 3.0), weight hourly space velocity (3.2, 3.4, 3.8 4.1 h−1) investigated process. Indeed, variation EB conversion, loss, ratio PX produced equilibrium condition (PXATE) by these influential factors experimentally monitored laboratory-scale reactor. Results show that small Si/Al 32 has higher provides best performance. Moreover, temperatures 375 °C, (H2/hydrocarbon) (WHSV) 3.5 h−1 optimum conditions