Mesoporous Carbon-Based Rhodium Catalysts for Benzene Hydrogenation

  • J. M. Jandosov Institute of Combustion Problems, 172 Bogenbai Batyr st., 050012, Almaty, Kazakhstan
  • Z. A. Mansurov Institute of Combustion Problems, 172 Bogenbai Batyr st., 050012, Almaty, Kazakhstan
  • M. A. Biisenbayev Institute of Combustion Problems, 172 Bogenbai Batyr st., 050012, Almaty, Kazakhstan
  • Z. R. Ismagilov Boreskov Institute of Catalysis, 5, Pr. Akad. Lavrentieva, 630090, Novosibirsk, Russia
  • N. V. Shikina Boreskov Institute of Catalysis, 5, Pr. Akad. Lavrentieva, 630090, Novosibirsk, Russia
  • I. Z. Ismagilov Boreskov Institute of Catalysis, 5, Pr. Akad. Lavrentieva, 630090, Novosibirsk, Russia
  • S. R. Konuspayeva Institute of Combustion Problems, 172 Bogenbai Batyr st., 050012, Almaty, Kazakhstan
  • M. Shaymardan Institute of Combustion Problems, 172 Bogenbai Batyr st., 050012, Almaty, Kazakhstan

Abstract

Two different carbons, namely CAS-P-500 and CRH-P-500, were prepared from apricot stones and rice husk by H3PO4-activation at 500 ºC and H3PO4/precursor (wt/wt) impregnation ratio of 2:1 followed by water washing and desilication by NaOH solution respectively. Elemental analyses of both samples using X-ray fluorescence spectroscopy and VARIO ELEMENTAR III elemental analyzer detected up to 1% of remained phosphorus and about 88% of carbon. SEM characterization and nitrogen adsorption data revealed that highly mesoporous materials were obtained. According to BJH scheme calculations, N2 BET-surface area and pore volume for CAS-P-500 reached the values of 2030 m2/g and 1.64 cm3/g, while for CRH-P-500: 1690 m2/g and 1.95 cm3/g respectively. Activated carbons CAS-P-500 and CRH-P-500 were used as catalyst supports for the conversion of small amounts of benzene into cyclohexane to obtain cleaner gasoline. According to Euro-3 standards, gasoline should contain less than 1% of benzene, since the incomplete combustion of gasoline, which contains benzene, leads to formation of benzopyrene- a powerful carcinogen in exhaust gases. The activity of rhodium catalysts based on the CAS-P-500 and CRH-P-500 allow complete conversion of benzene into cyclohexane at 40 atm and 80oC temperature and is comparable to those of based on conventional carbons: “Sibunit”, etc.

References

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Published
2012-02-15
How to Cite
[1]
J. Jandosov, “Mesoporous Carbon-Based Rhodium Catalysts for Benzene Hydrogenation”, Euras. Chem. Tech. J., vol. 14, no. 1, pp. 37-40, Feb. 2012.
Section
Articles