Kinetic Study of 1-Butene Isomerization over Hydrotalcite Catalyst

This work studied the isomerization of 1-butene over hydrotalcite catalyst. The experiments were conducted at various gas hourly space velocity (GHSV), reaction temperature and feed concentration. No catalyst deactivation was observed over the reaction time of 16 hours. Two major reaction products were trans-2- butene and cis-2-butene. The reaction temperature played an important role on the reaction selectivity. At high operating temperatures, the selectivity of trans-2-butene was higher than the selectivity of cis-2-butene while it was opposite at lower reaction temperature. In the range of operating condition, the maximum conversion of 1-butene was found at 74% when T = 673 K and GHSV = 4 m3/h/kg-cat with trans- and cis-2-butene selectivities of 54% and 46%, respectively. Finally, the kinetic parameters of the reaction were determined.

Authors:

• S. Sripinun
• K. Suriye
• S. Kunjara Na Ayudhyab
• P. Praserthdam
• S. Assabumrungrat

Keywords:

• Hydrotalcite
• isomerization
• kinetic
• 1-butene.

References:

[1] Pines, H., Veseley, J.A., and Ipatieff, V.N., Studies in the terpene series.
XXIV. Sodium-catalyzed double bonds migration and dehydrogenation
of d-limonene, l-a-phellandrene and of 2,4(8)- and 3,6(9)-pmenthadiene,
J. Am. Chem. Soc., vol. 77, pp., 1955.
[2] Tichit, D., et al., Textural Properties and Catalytic Activity of
Hydrotalcites, J. of Catalysis, vol. 151, pp. 50-59, 1995.
[3] Bellotto, M., Rebours, B., Clause, O., Lynch, J., Bazin, D., and Elkaiim,
E., J. Phys. Chem., vol. 100, pp., 1996.
[4] Corma, A., Fornés, V., Martín-Aranda, R.M., and Rey, F.,
Determination of base properties of hydrotalcites: Condensation of
benzaldehyde with ethyl acetoacetate, J. of Catalysis, vol. 134, pp. 58-
65, 1992.
[5] Beres, A., Hannus, I., and Kiricsi, I., Acid-base testing of catalysts using
1-butene isomerization as test reaction, React. Kinet. Catal. Lett., vol.
56, pp. 55-61, 1995.
[6] Choudhary, V.R., Catalytic isomerization of n-butene to isobutene,
Chem. Ind. Dev, vol., pp. 32-41, 1974.
[7] Zhao, Q., Chen, S.-L., Gao, J., and Xu, C., Effect of tungsten oxide
loading on metathesis activity of ethene and 2-butene over WO3/SiO2
catalysts, Transition Metal Chemistry, vol. 34, pp. 621-627, 2009.
[8] Hattori, H., Solid Base Catalysts: Fundamentals and Applications, in:
20th Annual Saudi-Japan Symposium, Catalysts in Petroleum Refining
& Petrochemicals Dhahran, Saudi Arabia, 2010.
[9] Ono, Y. and Hattori, H., Characterization of solid base catalyst, in: Solid
Base Catalysis, Springer Science & Business Media, pp. 45-46.