[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.6111/JKCGCT.2012.22.6.269

Ammonia decomposition over titanium carbides

Choi, Jeong-Gil (Department of Nano-Bio Chemical Engineering, Hannam University)

Publication Information

Journal of the Korean Crystal Growth and Crystal Technology / v.22, no.6, 2012 , pp. 269-273 More about this Journal

Abstract

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.

Keywords

Ammonia decomposition activity; Titanium carbides; TPR synthesis method; Relation between surface area and activity;

Citations & Related Records

Times Cited By KSCI : 3 (Citation Analysis)

Reference
Cited By KSCI

1	J.-G. Choi, "Preparation and characterization of niobium carbide crystallites", J. of the Korean Crystal Growth and Crystal Technology 19(3) (2009) 125. 과학기술학회마을
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. DOI ScienceOn
5	L. Volpe and M. Boudart, "Ammonia synthesis on molybdenum nitrides", J. Phys. Chem. 90 (1986) 4874. DOI
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. DOI ScienceOn
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. DOI ScienceOn
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. 과학기술학회마을 DOI ScienceOn
12	J.-G. Choi, "Synthesis and reactivity over molybdenum carbide crystallites", J. of the Korean Crystal Growth and Crystal Technology 20(2) (2010) 74. 과학기술학회마을 DOI ScienceOn
13	J.-G. Choi, J. Ha and J.-W. Hong, "Synthesis and catalytic properties of vanadium interstitial compounds", Appl. Catal. 168 (1998) 47. DOI ScienceOn
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. DOI
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.