Aligholi NIAEI, Dariush SALARI, Seyed Ali HOSSEINI, Reza ALESHZADEH, Hosein AFSHARY

Remediation of various naturally oxygenated volatile organic compounds (O-VOCS) by Mn- and Cr-supported $gamma - Al_2O_3$ nanocatalysts

The catalytic combustions of different naturally oxygenated volatile organic compounds (ethyl acetate, isopropanol, methyl ethyl ketone (MEK), and benzyl alcohol) alone and in binary mixtures were investigated over pure $gamma - Al _2O _3$, Mn/$gamma - Al _2O _3$, andCr/$gamma - Al _2O _3$ . The catalysts were prepared by the wet impregnation method and were characterized using XRD, ICP-AES, SEM, and BET. Mn/γ -Al2O3 showed higher activity than others in combustion of the O-VOCs, whereas complete conversion of isopropanol (the most reactive O-VOC) occurred at 350 $^o C$ and 400 $^o C$ on Mn/$gamma - Al _2O _3$ and Cr/$gamma - Al _2O _3$ , respectively. The following order was found for reactivity of organic compounds in single form: isopropanol > benzyl alcohol > ethyl acetate > MEK. There was no relation between activity of the catalyst and BET surface area. An inhibition/promotion effect was found in the oxidation of O-VOC binary mixtures because of the competitive adsorption on the catalyst, leading to an oxidation behavior for O-VOC binary mixtures different than that of single components. The presence of water vapor as a co-feed had an inhibition effect on isopropanol oxidation and was temperature-dependent such that it decreased above 350 $^o C$

PDF

___

1. Niaei, A.; Salari, D.; Hosseini, S. A.; Nabavi, R.; Jodaei, A. Int. J. Chem. React. Eng. 2008, 6, A104.
2. Niaei, A.; Salari, D.; Hosseini, S. A. Turk. J. Chem. 2010, 34, 15-25.
3. Hosseini, S. A.; Niaei, A.; Salari, D., Jodaei, A. Bull. Korean Chem. Soc. 2010, 31, 808-814.
4. Hosseini, S. A.; Niaei, A.; Salari, D., Aghazadeh, F. Chin. J. Chem. 2010, 28, 143-148.
5. Kim, D. H.; Woo, S. I.; Lee, J. M.; Yang, O. B. Catal. Lett. 2000, 70, 35-41.
6. Peluso, M. A.; Pronsato, E.; Sambeth, J. E.; Thomas, H. J.; Busca, G. Appl. Catal. B 2000, 78, 73-79.
7. Chintawar, P. S.; Greene, H. L. J. Catal. 1997, 165, 12-21.
8. Tost, R. M.; Gonzalez, J. S.; Torres, P.M.; Castell´on, E. R.; Jimenez-Lopez, A. Appl. Catal. B 2002, 38, 51-60.
9. Hussain, S. T.; Atta, M. A. Turk. J. Chem. 1997, 21, 77-83.
10. C¸a˘glayan, B. S.; Aksoylu, A. E. Turk. J. Chem. 2009, 33, 249-256.
11. Kaya, S.; Üner, D. Turk. J. Chem. 2008, 32, 645-652.
12. Kaya, S.; Erunal, E.; Shaltaf, R.; Ellialtıoglu, S¸.; Üner, D. Turk. J. Chem. 2009, 33, 11-21.
13. Wang, C. H. Chemosphere 2004, 55, 11-17.
14. Kim, S. C. J. Hazard. Mater. 2002, 91, 285-299.
15. ´Alvarez-Galvan, M. C.; Pawelec, B.; O’Shea, V.; Fierro, J. L. G.; Arias, P. L. Appl. Catal. B 2004, 51, 83-91.
16. Burgos, N.; Paulis, M.; Antxustegi, M.; Montes, M. Appl. Catal. B 2002, 38, 251-258.
17. Yang, Y.; Xu, X.; Sun, K. J. Hazard. Mater. 2007, 139, 140-145.
18. Niaei, A.; Salari, D.; Hosseini, S. A.; Khatamian, M.; Jodaei, A. Chin. J. Chem. 2009, 27, 483-488.
19. Beauchet, R.; Magnoux, P.; Mijoin, J. Catal. Today 2007, 124, 118-123.
20. Tsyrulnikov, P. G.; Tsybulya, S. V.; Kryukova, G. N.; Boronin, A. I.; Koscheev, S. V.; Starostina, T. G.; Bubnov, A. V.; Kudrya, E. N. J. Mol. Catal. A 2002, 179, 213-220.
21. Zaki, M. I.; Hasan, M. A.; Pasupulety, L.; Kumari, K. Thermochim. Acta 1998, 311, 97-103.
22. Stobbe, E. R.; de Boer, B. A.; Geus, J. W. Catal. Today 1999, 47, 161-167.
23. Abdullah, A. Z..; Abu Bakar, M. Z.; Bhatia, S. Ind. Eng. Chem. Res. 2003, 42, 6059-6067.