Open AccessThe study of chromium oxide loading on platinum chromium oxide zirconia catalyst for n-dodecane and 1,4-diisopropylbenzene hydrocracking
Author(s) -
Nur Hazirah Rozali Annuar,
Lee Peng Teh,
Herma Dina Setiabudi,
Muhammad Arif Ab Aziz,
Noor Salam,
Aishah Abdul Jalil
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/736/4/042039
Subject(s) - catalysis , platinum , tetragonal crystal system , materials science , chromium , cubic zirconia , fourier transform infrared spectroscopy , oxide , inorganic chemistry , dodecane , nuclear chemistry , chemical engineering , phase (matter) , chemistry , metallurgy , organic chemistry , ceramic , engineering
Hydrocracking reaction is one of the major processes in petroleum refining. To date, the exploration of a suitable catalyst for hydrocracking reaction remains challenging. The presence of Pt loaded on Cr 2 O 3 -ZrO 2 promotes the catalytic activity and stability of Cr 2 O 3 -ZrO 2 . While, zirconia has an interesting thermal and mechanical properties which make it as a support material. Therefore, in this study, platinum chromium oxide zirconia catalyst (Pt/Cr 2 O 3 -ZrO 2 ) with different Cr 2 O 3 loading (1, 4, 8, and 12 wt%) were prepared by impregnation method. The physical and chemical properties will be characterized by the XRD and FTIR analysis whereas catalytic testing will be analyzed by n -dodecane and 1,4-diisoproylbenzene hydrocracking. The XRD results showed that the peak intensity of the tetragonal phase of ZrO2 and bulk crystalline of Cr 2 O 3 increased with the increase in the Cr 2 O 3 loading from 1 to 12 wt%. The FTIR KBr analysis showed the presence of monoclinic and tetragonal phase of ZrO2 and none or only negligible amount of coke formed during the reaction. The 2,6-lutidine adsorbed FTIR analysis showed that six bands located at 1675, 1660, 1650, 1640, 1630 and 1625 cm −1 corresponding to the Bransted acid sites whereas the Lewis acid sites located at 1608, 1603, 1593, 1580, 1565 and 1560 cm −1 . For n -dodecane and 1,4-diisoproylbenzene hydrocracking, all catalysts showed 100% conversion except for Pt/12Cr 2 O 3 -ZrO 2 . Hence, the presence of tetragonal phase and Lewis acid sites play an important role for catalytic activity of n -dodecane and 1,4-diisoproylbenzene hydrocracking.