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Properties of sonochemically synthesized, highly dispersed MoS2/Al2O3 catalysts for the hydrodesulfurization of dibenzothiophene and 4,6-dimethyldibenzothiophene

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Authors
Lee, Jung Joon; Kwak, Chan; Yoon, Young Jin; Hyeon, Taeghwan; Moon, Sang Heup
Issue Date
2000
Citation
Studies in Surface Science and Catalysis, Vol.130 C, pp.2777-2782
Abstract
The sonochemical decomposition of molybdenum hexacarbonyl in the presence of sulfur and alumina generated a highly dispersed MoS2/Al2O3 catalyst. The catalysts were tested for the hydrodesulfurization (HDS) of dibenzothiophene and 4,6-dimethyldibenzothiophene. This sonochemically synthesized catalyst prepared by the direct sonication of molybdenum hexacarbonyl and sulfur exhibited superior HDS and hydrogenation activity compared to that of the catalysts prepared by other methods. The nitric oxide chemisorption studies of the catalysts revealed that the enhanced HDS activity resulted from the improved dispersion of the active species on the support. Temperature programmed reduction indicated that the poisoning of catalytically active sites by hydrogen sulfide did not occur on the sonochemically prepared catalysts. On the other hand, the catalysts prepared by the calcination and sulfidation of sonochemically generated Mo2C/Al2O3 showed low HDS activity due to the agglomeration of the surface particles during the heat treatments. © 2000 Elsevier Science B.V. All rights reserved.
ISSN
0167-2991
URI
http://hdl.handle.net/10371/166118
DOI
https://doi.org/10.1016/S0167-2991(00)80891-5
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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