n-Heptane hydroconversion over sulfated-zirconia-supported molybdenum carbide catalysts

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• 作者：F. F. Oloye ; A. J. McCue ; J. A. Anderson
• 关键词：Molybdenum carbide ; Sulfated zirconia ; n ; heptane ; Cracking ; Isomerisation
• 刊名：Applied Petrochemical Research
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：6
• 期：4
• 页码：341-352
• 全文大小：963KB
• 刊物主题：Catalysis; Industrial Chemistry/Chemical Engineering; Nanochemistry; Energy Technology; Nanotechnology and Microengineering;
• 出版者：Springer Berlin Heidelberg
• ISSN：2190-5533
• 卷排序：6

文摘

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.