Kinetic Modeling of Hydrodenitrogenation of Pyridine

• Published in: Petroleum science and technology 2009-04, Vol.27 (6), p.557-567
• Main Authors: Oyekunle, L. O., Edafe, O. A.
• Format: Article
• Language: English
• Subjects: Applied sciences; catalyst activity; Crude oil, natural gas and petroleum products; Energy; Exact sciences and technology; Fuels; hydrodenitrogenation; hydrotreating; kinetic modeling; nitrogen compounds; Petroleum products, gas and fuels. Motor fuels, lubricants and asphalts; Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units; selectivity
• ISSN: 1091-6466; 1532-2459
• DOI: 10.1080/10916460802104156

This study is aimed at developing a kinetic model for the hydrodenitrogenation (HDN) of pyridine. The developed model deals with the selectivity of piperidine, one of the products obtained from the HDN of pyridine and with the conversion of pyridine to piperidine. Kinetic parameters were estimated from the results of the experimental data obtained from literature sources where the reactions were carried out in a trickle-bed reactor in the liquid phase over Mo 2 C, NbMo 2 C, and MoS 2 /SiO 2 catalysts at temperatures of 480 to 590 K. POLYMATH 5.0 software was used to solve the proposed first-order model. It was shown that during the course of the HDN reaction of pyridine the conversion increases exponentially with temperature while selectivity of piperidine with respect to pyridine decreases with temperature. The changes in activation energies evaluated for the catalysts were 80.30 kJ/mol, 55.10 kJ/mol, and 40.85 kJ/mol for Mo 2 C, NbMo 2 C, and MoS 2 /SiO 2 , respectively.