Comparison of MgO-supported Ni-Mo hydrodesulfurization catalysts prepared by impregnation and by precipitation-adsorption in emulsion

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Title:Comparison of MgO-supported Ni-Mo hydrodesulfurization catalysts prepared by impregnation and by precipitation-adsorption in emulsion
Creators:
Koloušek, Vladimír
Pálka, Pavel
Hillerová, Eva
Zdražil, Miroslav
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 56, 3, pp. 580-589

Abstract

Magnesia-supported Ni-Mo sulfide catalysts were prepared by several versions of aqueous impregnation method and by the unconventional method of precipitation-adsorption of sulfides in emulsion water-toluene. The activity of catalysts was tested in hydrodesulfurization of thiophene at pressure of 1.6 Mpa. The samples of Ni-Mo/MgO prepared by impregnation exhibited only 15 – 30% of the activity of Ni-Mo/Al<sub>2</sub>O<sub>3</sub> catalysts Shell 324; the principle obstacle was found to be chemical and hydrothermal instability of MgO with high surface area. The activity of samples prepared by precipitation-adsorption was not much lower than that of the impregnated catalysts; this was taken as an indirect evidence of the acid-base interaction between sulfides and MgO surface. It was concluded that the course of low activity of Ni-Mo/MgO catalysts was textural and not chemical; surface area of Ni-Mo active phase in MgO-supported catalysts was supposed to be lower than in Al<sub>2</sub>O<sub>3</sub>-supported catalysts.

Title:Comparison of MgO-supported Ni-Mo hydrodesulfurization catalysts prepared by impregnation and by precipitation-adsorption in emulsion
Creators:
Koloušek, Vladimír
Pálka, Pavel
Hillerová, Eva
Zdražil, Miroslav
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:56
Number:3
Page Range:pp. 580-589
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19910580UNSPECIFIED
ID Code:4973
Item Type:Article
Deposited On:22 Feb 2010 11:27
Last Modified:22 Feb 2010 10:28

Citation

Koloušek, Vladimír; Pálka, Pavel; Hillerová, Eva; Zdražil, Miroslav (1991) Comparison of MgO-supported Ni-Mo hydrodesulfurization catalysts prepared by impregnation and by precipitation-adsorption in emulsion. Collection of Czechoslovak Chemical Communications, 56 (3). pp. 580-589. ISSN 0010-0765

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