Advances in Energy Research

  • 제5권1호
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  • Pages.13-29
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  • 2017
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  • 2287-6316(pISSN)
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  • 2287-6324(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Metal effects in Mn-Na2WO4/SiO2 upon the conversion of methane to higher hydrocarbons

  • 투고 : 2016.09.13
  • 심사 : 2017.04.13
  • 발행 : 2017.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

The roles of Na, Mn, W and silica, and the synergistic effects between each metal in the $MnNa_2WO_4/SiO_2$ catalyst have been investigated for oxidative coupling of methane (OCM). The crystallisation of amorphous silica during calcination at $900^{\circ}C$ was promoted primarily by Na, but Mn and W also facilitated this process. The interaction between Na and Mn tended to increase the extent of conversion of $Mn_3O_4$ to $Mn_2O_3$. The formation of $Na_2WO_4$ was dependent on the order in which Na and W were introduced to the catalyst. The impregnation of W before Na resulted in the formation of $Na_2WO_4$, but this did not occur when the impregnation order was reversed. $MnWO_4$ formed in all cases where Mn and W were introduced into the silica support, regardless of the impregnation order; however, the formation of $MnWO_4$ was inhibited in the presence of Na. Of the prepared samples in which a single metal oxide was introduced to silica, only $Mn/SiO_2$ showed OCM activity with significant oxygen conversion, thus demonstrating the important role that Mn plays in promoting oxygen transfer in the reaction. The impregnation order of W and Na is critical for catalyst performance. The active site, which involves a combination of Na-Si-W-O, can be formed in situ when distorted $WO_4^{2-}$ interacts with silica during the crystallisation process facilitated by Na. This can only occur if the impregnation of W occurs before Na addition, or if the two components are introduced simultaneously.

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참고문헌

  1. Arndt, S., Otremba, T., Simon, U., Yildiz, M., Schubert, H. and Schomackera, R. (2012), "$Mn-Na_2WO_4/SiO_2$ as catalyst for the oxidative coupling of methane what is really known?", Appl. Catal. A, 425, 53-61.
  2. Chang, Y.F. and McCarty, J.G. (1996), "Novel oxygen storage components for advanced catalysts for emission control in natural gas fueled vehicles", Catal. Today, 30(1-3), 163-170. https://doi.org/10.1016/0920-5861(95)00007-0
  3. Chua, Y.T., Mohamed, A.R. and Bhatia, S. (2008), "Oxidative coupling of methane for the production of ethylene over sodium-tungsten-manganese-supported-silica catalyst (Na-W-Mn/$SiO_2$)", Appl. Catal. A, 343(1), 142-148. https://doi.org/10.1016/j.apcata.2008.03.032
  4. Czuprat, O., Schiestel, T., Voss, H. and Caro, J. (2010), "Oxidative coupling of methane in a BCFZ perovskite hollow fiber membrane reactor", Ind. Eng. Chem. Res., 49(21), 10230-10236. https://doi.org/10.1021/ie100282g
  5. Elkins, T.W. and Hagelin-Weaver, H.E. (2015), "Characterization of $Mn-Na_2WO_4/SiO_2$ and $Mn-Na_2WO_4/MgO$ catalysts for the oxidative coupling of methane", Appl. Catal. A, 497, 96-106. https://doi.org/10.1016/j.apcata.2015.02.040
  6. Fleischer, V., Steuer, R., Parishan, S. and Schomacker, R. (2016), "Investigation of the surface reaction network of the oxidative coupling of methane over $Na_2WO_4/Mn/SiO_2$ catalyst by temperature programmed and dynamic experiments", J. Catal., 341, 91-103. https://doi.org/10.1016/j.jcat.2016.06.014
  7. Gao, W.W., Ye, S.Y. and Shao, M.W. (2011), "Solution-combusting preparation of mono-dispersed $Mn_3O_4$ nanoparticles for electrochemical applications", J. Phys. Chem. Sol., 72(9), 1027-1031. https://doi.org/10.1016/j.jpcs.2011.05.015
  8. Gordienko, Y., Usmanov, T., Bychkov, V., Lomonosov, V., Fattakhova, Z., Tulenin, Y., Shashkin, D. and Sinev, M. (2016), "Oxygen availability and catalytic performance of $NaWMn/SiO_2$ mixed oxide and its components in oxidative coupling of methane", Catal. Today, 278, 127-134. https://doi.org/10.1016/j.cattod.2016.04.021
  9. Hou, S.C., Cao, Y., Xiong, W., Liu, H.C. and Kou, Y. (2006), "Site requirements for the oxidative coupling of methane on $SiO_2$-supported Mn catalysts", Ind. Eng. Chem. Res., 45(21), 7077-7083. https://doi.org/10.1021/ie060269c
  10. Ji, S.F., Xiao, T.C., Li, S.B., Chou, L.J., Zhang, B., Xu, C.Z., Hou, R.L., York, A.P.E. and Green, M.L.H. (2003), "Surface $WO_4$ tetrahedron: The essence of the oxidative coupling of methane over $M-W-Mn/SiO_2$ catalysts", J. Catal., 220(1), 47-56. https://doi.org/10.1016/S0021-9517(03)00248-3
  11. Ji, S.F., Xiao, T.C., Li, S.B., Xu, C.Z., Hou, R.L., Coleman, K.S. and Green, M.L.H. (2002), "The relationship between the structure and the performance of $Na-W-Mn/SiO_2$ catalysts for the oxidative coupling of methane", Appl. Catal. A, 225(1), 271-284. https://doi.org/10.1016/S0926-860X(01)00864-X
  12. Jiang, Z.C., Yu, C.J., Fang, X.P., Li, S.B. and Wang, H.L. (1993), "Oxide/support interaction and surface reconstruction in the $Na_2WO_4/SiO_2$ system", J. Phys. Chem., 97(49), 12870-11287. https://doi.org/10.1021/j100151a038
  13. Jones, C.A., Leonard, J.J. and Sofranko, J.A. (1987), "The oxidative conversion of methane to higher hydrocarbons over alkali-promoted $Mn/SiO_2$", J. Catal., 103(2), 311-319. https://doi.org/10.1016/0021-9517(87)90123-0
  14. Kou, Y., Zhang, B., Niu, J.Z., Li, S.B., Wang, H.L., Tanaka, T. and Yoshidac, S. (1998), "Amorphous features of working catalysts: XAFS and XPS characterization of $Mn/Na_2WO_4/SiO_2$ as used for the oxidative coupling of methane", J. Catal., 173(2), 399-408. https://doi.org/10.1006/jcat.1997.1900
  15. Mahmoodi, S., Ehsani, M.R. and Ghoreishi, S.M. (2010), "Effect of promoter in the oxidative coupling of methane over synthesized $Mn/SiO_2$ nanocatalysts via incipient wetness impregnation", J. Ind. Eng. Chem., 16(6), 923-928. https://doi.org/10.1016/j.jiec.2010.09.007
  16. Nipan, G.D., Buzanov, G.A., Zhizhin, K.Y. and Kuznetsov, N.T. (2016), "Phase states of Li(Na,K,Rb,Cs)/W/Mn/$SiO_2$ composite catalysts for oxidative coupling of methane", Russ. J. Inorg. Chem., 61(14), 1689-1707. https://doi.org/10.1134/S0036023616140035
  17. Noon, D., Seubsai, A. and Senkan, S. (2013), "Oxidative coupling of methane by nanofiber catalysts", ChemCatChem, 5(1), 146-149. https://doi.org/10.1002/cctc.201200408
  18. Palermo, A., Vazquez, J.P.H. and Lambert, R.M. (2000), "New efficient catalysts for the oxidative coupling of methane", Catal. Lett., 68(3-4), 191-196. https://doi.org/10.1023/A:1019072512423
  19. Palermo, A., Vazquez, J.P.H., Lee, A.F., Tikhov, M.S. and Lambertz, R.M. (1998), "Critical influence of the amorphous silica-to-cristobalite phase transition on the performance of $Mn-Na_2WO_4/SiO_2$ catalysts for the oxidative coupling of methane", J. Catal., 177(2), 259-266. https://doi.org/10.1006/jcat.1998.2109
  20. Pol, V.G., Gedanken, A. and Calderon-Moreno, J. (2003), "Deposition of gold nanoparticles on silica spheres: A sonochemical approach", Chem. Mater., 15(5), 1111-1118. https://doi.org/10.1021/cm021013+
  21. Ren, Y., Bruce, P.G. and Ma, Z. (2011), "Solid-solid conversion of ordered crystalline mesoporous metal oxides under reducing atmosphere", J. Mater. Chem., 21(25), 9312-9318. https://doi.org/10.1039/c1jm10336a
  22. Senthil, K. and Yong, K. (2007), "Growth and characterization of stoichiometric tungsten oxide nanorods by thermal evaporation and subsequent annealing", Nanotechnol., 18(39), 1-7.
  23. Serres, T., Aquino, C., Mirodatos, C. and Schuurman, Y. (2015), "Influence of the composition/texture of Mn-Na-W catalysts on the oxidative coupling of methane", Appl. Catal. A, 504, 509-518. https://doi.org/10.1016/j.apcata.2014.11.045
  24. Sharma, B.K. (1997), Industrial Chemistry (Including Chemical Engineering), Goel Publishing House, Meerut, India.
  25. Simon, U., Gorke, O., Berthold, A., Arndt, S., Schomacker, R. and Schubert, H. (2011), "Fluidized bed processing of sodium tungsten manganese catalysts for the oxidative coupling of methane", Chem. Eng. J., 168(3), 1352-1359. https://doi.org/10.1016/j.cej.2011.02.013
  26. Stobbe, E.R., De Boer, B.A. and Geus, J.W. (1999), "The reduction and oxidation behaviour of manganese oxides", Catal. Today, 47(1-4), 161-167. https://doi.org/10.1016/S0920-5861(98)00296-X
  27. Wang, D., Rosynek, M.P. and Lunsford, J.H. (1995), "Oxidative coupling of methane over oxide-supported sodium-manganese catalysts", J. Catal., 155(2), 390-402. https://doi.org/10.1006/jcat.1995.1221
  28. Wu, J.A. and Li, S.B. (1995), "The role of distorted $WO_4$ in the oxidative coupling of methane on tungsten oxide supported catalysts", J. Phys. Chem., 99(13), 4566-4568. https://doi.org/10.1021/j100013a030
  29. Wu, J.G., Li, S.B., Niu, J.Z. and Fang, X.P. (1995), "Mechanistic study of oxidative coupling of methane over $Mn_2O_3/Na_2WO_4/SiO_2$ catalyst", Appl. Catal. A, 124(1), 9-18. https://doi.org/10.1016/0926-860X(94)00245-2
  30. Zhang, H.L., Wu, J.J., Qin, S. and Hu, C.W. (2006), "Study of the effect of gas space time on the combination of methane gas-phase oxidation and catalytic oxidative coupling over $Mn/Na_2WO_4/SiO_2$ catalyst", Ind. Eng. Chem. Res., 45(21), 7090-7095. https://doi.org/10.1021/ie060303n
  31. Zhao, Q.F., Chen, S.L., Gao, J.S. and Xu, C.M. (2009), "Effect of tungsten oxide loading on metathesis activity of ethene and 2-butene over $WO_3/SiO_2$ catalysts", Transit. Met. Chem., 34(6), 621-627. https://doi.org/10.1007/s11243-009-9239-3

피인용 문헌

  1. Synthesis and molecular structure of model silica-supported tungsten oxide catalysts for oxidative coupling of methane (OCM) vol.10, pp.10, 2017, https://doi.org/10.1039/d0cy00289e