Effect of phosphorus on the surface concentration of molybdenum and nickel in the oxide form of nickel—molybdenum/alumina catalysts and on their hydrodesulphurization activity

Atanasova, P.; Halachev, T.; Uchytil, Jan; Kraus, M.

doi:10.1016/s0166-9834(00)82828-6

Cited by 96 publications

(33 citation statements)

References 6 publications

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“…For both P/C + Ni(10)/Al (SUL) and Ni(5)P(5)/Al (SUL), we note a low yield of HC (Table 6; Nos. [32][33], which is on the same level as for the sulfided Ni/SiO 2 catalysts.…”

Section: Hdn Activity Of Supported Catalystsmentioning

confidence: 65%

Phosphorus Promotion of Ni(Co)-Containing Mo-Free Catalysts in Quinoline Hydrodenitrogenation

Robinson

Gestel

Korányi

et al. 1996

Journal of Catalysis

149

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“…For both P/C + Ni(10)/Al (SUL) and Ni(5)P(5)/Al (SUL), we note a low yield of HC (Table 6; Nos. [32][33], which is on the same level as for the sulfided Ni/SiO 2 catalysts.…”

Section: Hdn Activity Of Supported Catalystsmentioning

confidence: 65%

Phosphorus Promotion of Ni(Co)-Containing Mo-Free Catalysts in Quinoline Hydrodenitrogenation

Robinson

Gestel

Korányi

et al. 1996

Journal of Catalysis

149

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“…Improved dispersion [ 1,9,10], less deactivation [2] and decrement of the amount of inactive Co and Ni species [ 9,111 are explanations which have been put forward. The different effect of phosphates (P) on HDS and HDN [ 121 implicates that the function of P cannot simply be ascribed to one of the above mentioned explanations.…”

Section: Introductionmentioning

confidence: 99%

“…XPS data show that addition of P can lead both to a better and to a worse distribution of the MO species over the support [4,9,14,17,18]. This suggests that the structure of the MO-P catalysts strongly depends on the preparation conditions used, such as pH, P loading and sequence of impregnation.…”

Section: Introductionmentioning

confidence: 99%

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Structure of phosphorus containing CoO—MoO3/Al2O3 catalysts

et al. 1990

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Mangnus, P.J.; van Veen, J.A.R.; Eijsbouts, S.; de Beer, V.H.J.; Moulijn, J.A. Published in: Applied Catalysis DOI:10.1016/S0166-9834(00) Published: 01/01/1990 Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. ABSTRACTThe influence of phosphate (P) on the structure of alumina-supported CO-MO catalysts was studied by means of temperature-programmed reduction (TPR). Conclusions deduced from these TPR measurements were supported by Fourier transform infrared (FT-IR) and Raman measurements. Phosphorus added by sequential impregnation or coimpregnation had a great influence on both Co and MO surface structure. Addition of P to an alumina support resulted in the formation of a well dispersed AlPO, surface layer. Next to the phases already reported on Co/Al,O, catalyst, cobalt can be present in interaction with the AlPO, species in Co-P/A&O, catalysts. Coimpregnation of Co and P increased the dispersion of the cobalt species. The influence of P on the distribution of the MO species depends on the P content and the sequence of impregnation. On MO-P catalysts, prepared by coimpregnation, the reducibility of apart of the MO species decreased with increasing P content due to the formation of MO-O-P species. On the catalysts prepared by sequential impregnation of P and MO a part of the MO was present in MOO, crystallites, the other part was very well distributed over the AlPO, surface layer. These results suggest that at high P loadings, MO can be present as a MO-AlPO, surface structure. Both sequential and coimpregnation of Co, MO and ...

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“…It is well documented that sulfided catalysts with additives are used in hydrotreating reactions such as hydrogenation (HDN), hydrodesulfurization (HDS), hydrodenitrogenation (HDN) and hydrodemetallization (HDM) [1,2,3]. Additives such as P have a promotional effect when added to the oxide forms of the catalyst and this effect is typically explained in terms of dispersion of the metal salts on the support, modification of acid sites or formation of a new active phase [4,5].…”

Section: Introductionmentioning

confidence: 99%

Novel Supported Bimetallic Carbide Catalysts for Coprocessing of Coal with Waste Materials

Chen¹,

Cox²,

Allen³

et al. 1998

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Effect of phosphorus on the surface concentration of molybdenum and nickel in the oxide form of nickel—molybdenum/alumina catalysts and on their hydrodesulphurization activity

Cited by 96 publications

References 6 publications

Phosphorus Promotion of Ni(Co)-Containing Mo-Free Catalysts in Quinoline Hydrodenitrogenation

Phosphorus Promotion of Ni(Co)-Containing Mo-Free Catalysts in Quinoline Hydrodenitrogenation

Structure of phosphorus containing CoO—MoO3/Al2O3 catalysts

Novel Supported Bimetallic Carbide Catalysts for Coprocessing of Coal with Waste Materials

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