Abstract
Molybdenum carbide on sulfated zirconia was prepared by impregnation of MoO3 on sulfated zirconia to give a loading of 5 wt% followed by carburisation at 923 K in a mixture of CH4/H2 (4:1). The resulting catalyst was characterised by N2 adsorption–desorption, CO chemisorption, FTIR of pyridine adsorption, XRD, TPR, TGA, Raman and SEM–EDX. This combination of characterisation studies suggests formation of a well-dispersed Mo2C phase over tetragonal zirconia. When employed in the hydroconversion of n-heptane, high temperature and low space velocity lead to substantial cracking. However, under some conditions, an increase in the research octane number (RON) from 0 (n-heptane) to ca. 50 was attained. Between 723 and 873 K, n-heptane is mainly cracked to iso-pentane and ethane. The product distribution as a function of conversion suggests that the reaction did not simply follow a consecutive reaction pathway, but that other parallel routes were involved.
Original language | English |
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Pages (from-to) | 341-352 |
Number of pages | 12 |
Journal | Applied Petrochemical Research |
Volume | 6 |
Issue number | 4 |
Early online date | 19 Oct 2016 |
DOIs | |
Publication status | Published - Dec 2016 |
Bibliographical note
Tertiary Education Trust Fund (TETFUND) NigeriaKeywords
- molybdenum carbide
- sulfated zirconia
- n-Heptane
- cracking
- isomerisation