Optimization of Pd Membrane Reactor for Direct Oxidation of Aromatic Compounds
Keywords:
Membrane Reactor, Modelling, Pd Membrane, Direct Oxidation
Abstract
Computational fluid dynamic has already become a widely used and indispensable design and optimization tool in many technical areas. In the present work, the CFD simulations have been coupled with complex chemical reactions to model a membrane tubular reactor which is used to produce phenol from benzene in the vapor phase. Hydrogen dissociates on the palladium layer and reacts with oxygen to give active oxygen species, which attack benzene to produce phenol. In principal, reaction occurs in the surface of palladium and conversion of benzene is increased by changing the length and diameter of the Pd coated PSS tubes. The reactor length and diameter are two geometrical factors which are concerned in the present study. Although increasing the reactor length increase the conversion of benzene to phenol but the concentration of the phenol start to decrease. Based on the data provided by the experiments, a mathematical model has been constructed to conduct a simulation which leads us to an optimum design of a new tubular membrane micro-reactor.References
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5. K. Nomiya, S. Matsuoka, T. Hasegawa, Y. Nemoto, “Benzene hydroxylation with hydrogen peroxide catalyzed by vana- dium(V)-substituted polyoxomolybdates” J. Mol. Catal. A: Chemical 156 (2000) 143- 152.
6. N. Itoh, S. Niwa, F. Mizukami, T. Inoue, A. Igarashi, T. Namba, “Catalytic palladium membrane for reductive oxidation of benzene to phenol” Catal. Commun. 4 (2003) 243-246.
7. I. Yamanaka, K. Morimoto, M. Soma and K. Otsuka, “Oxidation of methane and benzene with oxygen catalyzed by reduced vanadium species at 40°C” J. Mol. Catal. A: Chemical, 133 (1998) 251-254.
8. Yoshihiko Moro-oka, Munetaka Akita , “Bio -inorganic approach to hydrocarbon oxidation” Catal. Today 41 (1998) 327-338.
9. S. Niwa, M. Eswaramoorthy, J. Nair, A. Raj, N. Itoh, H. Shoji, Y. Namba, F. Mizukami, “A one-step conversion of benzene to phenol with a palladium membrane” J. of Science 295 (2002) 105.
10. US patent 5055623 “Preparation of phenols by direct N2O hydroxylation of aromatic su- bstrates”
11. US patent 2002042544 A1 “Method for oxidation of benzene and / or toluene to phenol and / cresols”
12. A. Ribera, I.W.C.E. Arends, S. de Vries,J. Perez-Ramirez, R.A. Sheldon, “Preparation, Characterization, and Performance of Fe ZSM-5 for the Selective Oxidation of Ben- zene to Phenol with N2O” J. Catal. 195 (2000) 287-297.
13. L. V.Pirutko, V.S. Chernyavsky, A.K. Uriarte, G.I. Panov, “Oxidation of benzene to phenol by nitrous oxide: Activity of iron in zeolite matrices of various composition” Appl. Catal. A: General 227 (2002) 143-157.
14. ] K.A. Dubkov, N.S. Ovanesyan, A.A. Shteinman, E.V. Starokon and G.I. Panov, “Evolution of Iron States and Formation of α-Sites upon Activation of FeZSM-5 Zeolites” J. Catal. 207 (2002) 341.
15. E.J.M. Hensen, Q. Zhu, M.M.R.M. Hendrix, A.R. Overweg, P.J. Kooyman, M.V. Sychev, R.A. van Santen, “Effect of high-temperature treatment on Fe/ZSM-5 prepared by chemical vapor deposition of FeCl3: I. Physicochemical characterization” J. Catal. 221 (2004) 560.
16. E.J.M. Hensen, Q. Zhu, R.A.J. Janssen, P.C.M.M. Magusin, P.J. Kooyman, R.A. van Santen, “Selective oxidation of benzene to phenol with nitrous oxide over MFI zeolites: 1. On the role of iron and aluminium” J. Catal. 233 (2005) 123.
17. J. Pérez-Ramírez, F. Kapteijn, A. Brückner, “Active site structure sensitivity in N2O conversion over FeMFI zeolites” J. Catal. 218 (2003) 234.
Published
2011-12-31
How to Cite
Rasouli, M., Chitsazan, S., Sayyar, M. H., Yaghobi, N., & Bozorgi, B. (2011). Optimization of Pd Membrane Reactor for Direct Oxidation of Aromatic Compounds. ASEAN Journal of Chemical Engineering, 11(2), 8-15. Retrieved from https://journal.ugm.ac.id/v3/AJChE/article/view/8075
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