한국결정성장학회지 (Journal of the Korean Crystal Growth and Crystal Technology)

  • 제22권6호
  • /
  • Pages.269-273
  • /
  • 2012
  • /
  • 1225-1429(pISSN)
  • /
  • 2234-5078(eISSN)
한국결정성장학회 (The Korea Association of Crystal Growth)
권호 표지
DOI QR코드

DOI QR Code

Ammonia decomposition over titanium carbides

  • Choi, Jeong-Gil (Department of Nano-Bio Chemical Engineering, Hannam University)
  • 투고 : 2012.09.21
  • 심사 : 2012.11.02
  • 발행 : 2012.12.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Ammonia decomposition over titanium carbides were investigated using eight different samples which have been synthesized by TPR (temperature-programmed reduction) method of titanium oxide ($TiO_2$) with pure $CH_4$. The resulting materials which were synthesized using wo different heating rates and space velocity exhibited the different surface areas. These results indicated that the structural properties of these materials have been related to heating rates and space velocity employed. The titanium carbides prepared in this study proved to be active for ammonia decomposition, and the activity changed with the particle size/surface area. These showed the relationship between ammonia decomposition activity and the different active species. Compared to molybdenum carbide, the titanium carbides were one order of magnitude less active, suggesting the correlation between the activity difference and the degree of electron transfer between metals and carbon in metal carbides.

키워드

참고문헌

  1. J.-G. Choi, "Preparation and characterization of niobium carbide crystallites", J. of the Korean Crystal Growth and Crystal Technology 19(3) (2009) 125.
  2. L. leclercq, K. Imura, S. Yoshida, T. Barbee and M. Boudart, "Preparation of catalysts II", edited by Delmon, B., Elsevier, NY. (1978) p. 627.
  3. D.J. Sajkowski and S.T. Oyama, "Symposium on the chemistry of W/Mo catalysis", Prep. Petrol. Chem. Div., 199th ACS Nat. Meeting 35(2) (1990) 233.
  4. J.-G. Choi, J.R. Brenner, C.W. Colling, B.G. Demczyk, J. Dunning and L.T. Thompson, "Synthesis and characterization of molybdenum nitride hydrodenitrogenation catalysts", Catalysis Today 15 (1992) 201. https://doi.org/10.1016/0920-5861(92)80176-N
  5. L. Volpe and M. Boudart, "Ammonia synthesis on molybdenum nitrides", J. Phys. Chem. 90 (1986) 4874. https://doi.org/10.1021/j100411a031
  6. J.-G. Choi, H.J. Lee, Y.-J. So, Y.-K. Yoon, J.-S. Kim and D.-S. Choi, "Synthesis and catalytic properties of niobium carbides: The effect of synthesis conditions", J. of Sci. Res. Inst. Hannam Univ. 29 (1999) 417.
  7. R.B. Levy and M. Boudart, "Platinum-like behavior of tungsten carbide in surface catalysis", Science 181 (1973) 547. https://doi.org/10.1126/science.181.4099.547
  8. J.H. Singelt and D.J.C. Yates, "Transition metal carbides", Nature Phys. Sci. 229 (1971) 27.
  9. L.E. Toth, "Transition metal carbides and nitrides", Academic Press, New York (1971) p. 234.
  10. J.-G. Choi, J.R. Brenner and L.T. Thompson, "Pyridine hydrodenitrogenation over molybdenum carbide catalysts", J. Catal. 154 (1995) 33. https://doi.org/10.1006/jcat.1995.1143
  11. J.-G. Choi, "Effects of experimental conditions on synthesis of titanium carbide crystallites", J. of the Korean Crystal Growth and Crystal Technology 20(2) (2010) 80. https://doi.org/10.6111/JKCGCT.2010.20.2.080
  12. J.-G. Choi, "Synthesis and reactivity over molybdenum carbide crystallites", J. of the Korean Crystal Growth and Crystal Technology 20(2) (2010) 74. https://doi.org/10.6111/JKCGCT.2010.20.2.074
  13. J.-G. Choi, J. Ha and J.-W. Hong, "Synthesis and catalytic properties of vanadium interstitial compounds", Appl. Catal. 168 (1998) 47. https://doi.org/10.1016/S0926-860X(97)00332-3
  14. P.A. Armstrong, A.T. Bell and J.A. Reimer, "Comparison of the dynamics and orientation of chemisorbed benzene and oyridine on $\gamma-Mo_{2}N$", J. of Phys. Chem. 97 (1993) 1952. https://doi.org/10.1021/j100111a037
  15. G.V. Samsonov, T.G. Bulankova, P.A. Khodak, E.M. Preshedromirskaya, V.S. Sinelnikova and V.M. Sleptsov, "Catalytic properties of carbides and silicides of transition metals in the dehydrogenation of EthyIbenZene to styrene", Kinet. Katal. 10 (1969) 863.

피인용 문헌

  1. Ammonia Decomposition Over Tantalum Carbides of Hydrogen Fuel Cell vol.9, pp.1, 2013, https://doi.org/10.7849/ksnre.2013.9.1.051