International Journal of Scientific & Technology Research

IJSTR@Facebook IJSTR@Twitter IJSTR@Linkedin
Home About Us Scope Editorial Board Blog/Latest News Contact Us

IJSTR >> Volume 5 - Issue 1, January 2016 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Effect Of pH On The Physicochemical Properties Of MoVTeNbOx Catalysts For Oxidation Of Propane To Acrylic Acid

[Full Text]



Syazwani M.N, Irmawati R, Taufiq-Yap Y.H, Zainuddin, N.



Index Terms: microwave-assisted, MoVTeNbOx mixed metal oxide, pH, post treatment, propane oxidation



Abstract: Mo1.0V0.3Te0.23Nb0.12 mixed metal oxide catalysts were prepared via slurry method followed by microwave irradiation. The pH (1, 3, 5, and 7) of the synthesis solution was shown to affect physicochemical properties of the catalysts. XRD analysis revealed that the monophasic orthorhombic M1 phase Te2M20O57 (M = Mo, V, and Nb) was only developed when pH was 1. This catalyst displayed BET surface area, 18.0 m2/g the highest among other samples after post treatment and suggested the elimination of hexagonal M2 phase. The sample was also highly reducible with reduction temperature coincide very well with the temperature of catalytic reaction. Therefore, this catalyst was also active and selective for anaerobic propane oxidation to acrylic acid.



[1] Lin, M. M. (2001). Selective oxidation of propane to acrylic acid with molecular. Applied Catalysis A: General, 207: 1–16.

[2] Voge, H. H., and Adams, C. R. (1967). Catalytic oxidation of olefins. Advances in Catalysis, 17:151.

[3] Yu, Z., Zheng, W., Xu, W., Zhang, Y., Fu, H., and Zhang, P. (2009). Effect of preparation conditions on selective oxidation of propane to acrylic acid. Transactions of Nonferrous Metals Society of China, 19:476-479.

[4] Beato, P., Blume, A., Girgsdies, F., Jentoft, R.E., Schlögl, R., Timpe, O., Trunschke, A., Weinberg, G., Basher, Q., Hamid, F.A., Hamid, S.B.A., Omar, E., and Mohd Salim, L. (2006). Analysis of structural transformations during the synthesis of a MoVTeNb mixed oxide catalyst. Applied Catalysis A: General, 307(1):137-147.

[5] Ueda, W., Vitry, D., Katou, T., Watanabe, N., and Endo, Y. (2006). Key aspects of crystalline Mo-V-O-based catalysts active in the selective oxidation of propane. Research on Chemical Intermediates, 32(3-4): 217-233.

[6] Ushikubo, T., Nakamura, H., Koyasu, Y., and Wajiki, S. (1995). Method for producing an unsaturated carboxylic acid. Patent 5 380 933.

[7] Ushikubo, T., Oshima, K., Kayou, A., and Hatano, M. (1997). Ammoxidation of propane over Mo-V-Nb-Te mixed oxide catalysts. Studies in Surface Science and Catalysis, 112:473-480.

[8] Grasselli, R.K., Buttrey, D.J., DeSanto Jr, P., Burrington, J.D., Lugmair, C.G., Volpe Jr, A. F., and Weingand, T. (2004). Active centers in Mo–V–Nb–Te–Ox (amm)oxidation catalysts. Catalysis Today, 91–92: 251-258.

[9] Oliver, J.M., López Nieto, J.M., Botella, P., and Mifsud, A. (2004). The effect of pH on structural and catalytic properties of MoVTeNbO catalysts. Applied Catalysis A: General, 257(1): 67-76.

[10] Guan, J., Wang, H., Yang, Y., Liu, B., Yu, X., Ma, Y., and Kan, Q. (2009). Effect of pH on the catalytic properties of Mo–V–Te–P–O catalysts for selective oxidation of isobutane. Catalysis Letters, 131(3-4):512-516.

[11] Yu, Z., Zheng, W., Xu, W., Zhang, P., Fu, H., and Zhang, Y. (2011). Crystalline structure of mixed metal oxide catalysts for propane selective oxidation to acrylic acid. Transactions of Nonferrous Metals Society of China, 21(2):405-411.

[12] Irmawati, R., Muda, A. A., Ismail, A.Z., and Ahangar, H.A. (2011). Patent Pending no PI2011003855.

[13] Sanfiz, A.C., Hansen, T.W., Girgsdies, F., Timpe, O., Rodel, E., Ressler, T., Trunschke, A., and R. Schlogl, R. (2008). Preparation of phase-pure M1 MoVTeNb oxide catalysts by hydrothermal synthesis—Influence of reaction parameters on structure and morphology. Topics in Catalysis, 50:19–32.

[14] Deniau, B., Bergeret, G., Jouguet, B., Dubois, J.L., and Millet, J.M.M. (2008). Preparation of single M1 phase MoVTe(Sb)NbO catalyst: Study of the effect of M2 phase dissolution on the structure and catalytic properties. Topics in Catalysis, 50(1-4):33-42.

[15] Vitry, D., Morikawa, Y., Dubois, J.L., and Ueda, W. (2003). Mo-V-Te-(Nb)-O mixed metal oxides prepared by hydrothermal synthesis for catalytic selective oxidations of propane and propene to acrylic acid. Applied Catalysis A: General, 251: 411-424.

[16] Ivars, F., Solsona, B., Hernández, S. and López Nieto, J.M. (2010). Influence of gel composition in the synthesis of MoVTeNb catalysts over their catalytic performance in partial propane and propylene oxidation. Catalysis Today, 149:260-266.

[17] Lin, M. M. (2003). Complex metal oxide catalysts for selective oxidation of propane and derivatives: II. The relationship among catalyst preparation, structure and catalytic properties. Applied Catalysis A: General, 250:287-303.

[18] Jiang, H. C., Lu, W. M., and Wan, H. L. (2004). The effect of MoV0.3Te0.23PxOn catalysts with different phosphorus content for selective oxidation of propane to acrolein. Journal of Molecular Catalysis A-Chemical, 208: 213-217.