Articles & Issues

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

All issues

Ga로 변형된 HASM-5 촉매상에서 n-헥산의 방향족화 반응

Aromatization of n-Hexane over HZSM-5 Type Catalysts Modified with Gallium

이준원 박용철 이현구

Lee JW Park YC Rhee HK

HWAHAK KONGHAK, February 1996, 34(1), 111-116(6), NONE

Download PDF

Abstract

Ga를 HZSM-5에 함침시켜 공기 중에서 소성하게 되면 Ga는 가장 안정한 산화상태인 Ga₂O₃로 전환되므로 Ga₂O₃를 HZSM-5와 물리적으로 혼합한 후 n-헥산의 전환반응에 적용하였다. 반응결과를 Ga 함침촉매와 비교하고 TEM 및 TPD 분석결과와 연관지어 HZSM-5의 산점과 Ga의 작용점 사이의 관계를 검토하였다. 또한 Ga를 구조격자 내부에 도입하여 gallosilicate를 제조한 후 방향족 화합물에 대한 선택도를 조사하였으며 소성온도 및 Ga 함침에 의한 영향을 조사하고 촉매의 특성분석 결과와 연관지어 방향족화 반응에 대한 활성점을 규명하였다.

Since the species Ga in Ga/HZSM-5 would be converted to Ga₂O₃ and applied to the conversion of n-hexane. The experimen-tal results of the catalytic reaction was compared with those over Ga/HZSM-5 catalyst. The mixture catalyst was also characterized by TEM and TPD analysis. These results were combined together to elucidate the relationship between the acid sites of HZSM-5 and active gallium species. Also, gallosilicate was synthesized by introducing Ga into the framework and applied to the conversion of n-hexane. Investigated here were the BTX selectivity, the influence of the calcination temperature and the effect of Ga-impregnation. This information was then correlated with the catalytic characteristics of gallosilicate to examine the active site for aromatization reaction.

Keywords

n-Hexane Aromatization Ga/HZSM-5 Ga₂O₃+HZSM-5 Gallosilicate

References

Lee JW, Rhee HK, HWAHAK KONGHAK, 33(2), 204 (1995)
Corma A, Planelles J, Shachez J, Marin J, Thomas F, J. Catal., 93, 30 (1985)
Mirodatos C, Barthomeuf D, J. Catal., 114, 121 (1988)
Wielers AFH, Vaarkamp M, Post MFM, J. Catal., 127, 51 (1991)
Gnep NS, Doyement JY, Appl. Catal., 43, 155 (1988)
Kofke TJG, Gorte RJ, Kokotailo GT, Appl. Catal., 54, 177 (1989)
Price GL, J. Catal., 130, 611 (1991)
vanderGaag FJ, Jansen JC, Van Bekkum H, Appl. Catal., 17, 261 (1985)
Szostak R, "Molecular Sieves Principles of Synthesis and Identification," Van Nostrand Reinhold Catalysis Series, N.Y., 290 (1989)
Kanai J, Kawata N, Appl. Catal., 62, 141 (1990)
Lee JW, Lee JK, Rhee HK, HWAHAK KONGHAK, 32(2), 248 (1994)
Dejaifve P, Vedrine JC, Bolis V, Derouane EG, J. Catal., 63, 331 (1980)
Gnep NS, Doyement JY, Seco AM, Ribeiro FR, Guisnet M, Appl. Catal., 35, 93 (1987)
Verdine JC, Dejaifve P, Garboski ED, Derouane EG, "Catalysis by Zeolites," Imeliket, B, et al., Eds., Elsevier, Amsterdam, 4, 29 (1980)
Gnep NS, Doyement JY, Guisnet M, Mol. Catal., 45, 281 (1988)
Meriaudeau P, Sapaly G, Naccache C, "Zeolites: Facts, Figures, Future," Kazansky, V.B., Kustov, L.M., Khodakov, A.Y., Jacobs, P.A. and van Santen, R.A., eds., Elsevier, Amsterdam, 1173 (1989)
Kanai J, Kawata N, Appl. Catal., 55, 115 (1989)
Kanai J, Kawata N, J. Catal., 141, 284 (1988)