The Effect of Different Supports on the ‎Characteristic and Catalytic Properties of ‎ Ni-Mo/Cs1.5H1.5PW12O40/S (S= SiO2 or Al2O3 or ‎ASA) Nanocatalysts in Hydrocracking of n-‎decane

Document Type : Research Paper

Authors

1 ‎Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, ‎Iran.‎

2 ‎Research Institute of Petroleum Industry, Tehran, Iran.‎

3 ‎Department of Chemistry, Azarbaijan Shahid Madani University, Tabriz, Iran.‎

Abstract

   In this research, Ni-Mo/Cs1.5H1.5PW12O40/S (S=SiO2 or Al2O3 or ASA (amorphous silica alumina)) nanocatalysts with different supports were prepared via 2 steps with impregnation method and the effect of support on the characteristic and catalytic properties of the prepared samples was studied. The synthesized samples were characterized by X-ray diffraction (XRD), temperature programmed desorption (TPD), temperature programmed reduction (TPR), and energy dispersive X-ray spectroscopy (EDX). Morphology of the samples was studied by field emission scanning electron microscope (FE-SEM) and the surface area, pore volume and pore size of the catalysts were determined by BET (Brunauer-Emmett-Teller) method. In the XRD patterns of the prepared catalysts, the H3PW12O40 (HPW) phase was observed. The FE-SEM images showed that the synthesized particles were in nanoscale. The results of TPD studies indicated that moderate acidic sites of Al2O3 supported nanocatalyst was more than the others. The catalytic activity of the nanocatalysts in hydrocracking of n-decane indicated that Al2O3 supported nanocatalyst had the highest catalytic activity.

Keywords


  1. Cui, Q., Zhou, Y., Wei, Q., Yu, G., Zhu, L., (2013). “Performance of Zr- and P-modified USY-based catalyst in hydrocracking of vacuum gas oil”, Fuel Processing Technology, 106: 439-446.
  2. Looi, P. Y., Mohamed, A. R., Tye, C. T., (2012). “Hydrocracking of residual oil using molybdenum supported over mesoporous alumina as a catalyst”, Chemical Engineering Journal, 181–182: 717-724.
  3. Eom, H. J., Lee, D. W., Kim, S., Chung, S. H., Hur, Y. G., Lee, K. Y., (2014). “Hydrocracking of extra-heavy oil using Cs-exchanged phosphotungstic acid (CsxH3-xPW12O40, x = 1-3) catalysts”, Fuel, 126: 263–270.
  4.  Jin, H., Guo, D., Sun, X., Sun, S., Liu, J., Zhu, H., Yang, G., Yi, X., Fang, W., (2013).“Direct synthesis, characterization and catalytic performance of non-sulfided Ni–CsxH3-xPW12O40/SiO2 catalysts for hydrocracking of n-decane”, Fuel, 112: 134-139.
  5.  Liu, L., Wang, B., Yonghua, D., Borgna, A., (2015). “Supported H4SiW12O40/Al2O3 solid acid catalysts for dehydration ofglycerol to acrolein: Evolution of catalyst structure and performancewith calcination temperatureLicheng”, Applied Catalysis A: General, 489: 32-41.
  6. Frattini, L., Mark, I., Christopher, M. A., Wilson, K., Kyriakou, G., Lee, A. F., (2017). “Support enhanced α-pinene isomerization over HPW/SBA-15” Applied Catalysis B: Environmental, 200: 10–18.
  7. Jin, H., Yi, X., Sun, S., Liu, J., Yang, G., Zhu, H., Fang, W., (2012). “Hydrocracking of n-decane over non-sulfided Ni-CsxH3-xPW12O40/Al2O3 catalysts”, Fuel Processing Technology, 97: 52-59.
  8.  De Mattos, F. C. G., De Carvalho, E. N. C. B., Freitas, E. F., De Paiva, M. F., Ghesti, G. F., De Macedo, J. L., Dias, S. C. L., Dias, J. A., (2017). “Acidity and Characterization of 12-Tungstophosphoric Acid Supported on Silica‑Alumina”, J. Braz. Chem. Soc., 28: 336-347.
  9. Qiu, B., Yi, X. D., Lin, L., Fang, W.P., Wan, H.L., (2008). “The hydrocracking of n-decane over bifunctional Ni-H3PW12O40/SiO2 catalysts”, Catalysis Today, 131: 464-471.
  10. Corma, A., Martinez, A., Martinez, C., (1996). “Acidic Cs+, NH4+, and K+ Salts of 12-Tungstophosphoric Acid as Solid Catalysts for Isobutane/2-butene Alkylatio”, Journal of Catalysis, 164: 422-432.
  11. Narasimharao, K., Brown, D. R., Lee, A. F., Newman, A.D., Siril, P. F., Avener, S. J., (2007). “Structure–activity relations in Cs-doped heteropolyacid catalysts for biodiesel production”, Journal of Catalysis, 248: 226-234.
  12. Ameen, M., Azizan, M. T, Ramli, A., Yusup, S., Yasir, M., (2016). “Physicochemical properties of Ni-Mo/γ-Al2O3 catalysts synthesized via sonochemical method”, Procedia Engineering, 148: 64-71.
  13. Liu, H. P, Lu, G. Z., Guo, Y., Wang, Y.Q., Guo, Y. L., (2009). “Synthesis of mesoporous Pt/Al2O3 catalysts with high catalytic performance for hydrogenation of acetophenone”, Catalysis Communications, 10: 1324-1329.
  14. Jiang, J., Dong, Z., Chen, H., Sun, J., Yang, Ch., Cao, F., (2013). “The Effect of Additional Zeolites in Amorphous Silica−Alumina Supports on Hydrocracking of Semirefined Paraffinic Wax”. Energy and Fuels, 27: 1035-1042.
  15. Mastikhin, V. M., Kulikov, S. M., Nosov, A. V., Kozhevnikov, I. V., Mudrakovsky, I. L., Timofeeva, M. N., (1990). “1H and 31P MAS NMR studies of solid heteropolyacids and H3PW12O40 supported on SiO2”, Journal of Molecular Catalysis, 60: 65–70.
  16. Maity, S. K., Ancheyta, J., Alonso Mohan, F., Rana, S., (2004). “Preparation, characterization and evaluation of Maya crude hydroprocessing catalysts”, catalysis Today, 98: 193-199.
  17. Reina, T. R., Yeletsky, P., Bermúdez, J. M., Arcelus-Arrillaga, P., Yakovlev, V. A., Millan, M., (2016). “Anthracene aquacracking using NiMo/SiO2 catalysts in supercritical water conditions”, Fuel, 182: 740–748.
  18. Amimoghadam, H., Hossaini Sadr, M., Aghabozorg, H.R., Salehirad, F., Irandoukht, A., (2018). “The effect of molybdenum on the characteristicsand catalytic properties of M/Cs1.5H1.5PW12O40/Al2O3 (M = Ni or/and Mo) nanocatalysts in the hydrocracking of n-decane”, Reaction Kinetics, Mechanisms and Catalysis, 125: 983–994.
  19. Roussel, M., Lemberton, J., Guisnet, M., Cseri, T., Benazzi, E., (2003). “Mechanisms of n-decane hydrocracking on a sulfided NiW on silica-alumina catalyst”, Journal of Catalysis, 218: 427-437.