A highly loaded and dispersed Ni2P/SiO2 catalyst for the hydrotreating reactions

Zhao, Yu; Xue, Mingwei; Cao, Muhan; Shen, Jianyi

doi:10.1016/j.apcatb.2011.03.028

Cited by 31 publications

(19 citation statements)

References 27 publications

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“…It was found that the HDS products of DBT on Zn x Mg 1−x Ni-P/Al 2 O 3 are only BP and CHB. Similar product distributions have been reported [24][25][26]. As showed in Figure 6b, the selectivity of BP increases and that of CHB decreases with the increase in temperature for all catalysts.…”

Section: Catalystsupporting

confidence: 68%

High Active Zn/Mg-Modified Ni–P/Al2O3 Catalysts Derived from ZnMgNiAl Layered Double Hydroxides for Hydrodesulfurization of Dibenzothiophene

et al. 2017

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A series of ZnMgNiAl layered double hydroxides (LDHs) containing 20 wt.% Ni and different Zn/Mg molar ratios were prepared by a coprecipitation method, and then were introduced with H 2 PO 4 − via a microwave-hydrothermal method. With the resulting mixtures as the precursors, Zn/Mg-modified ZnMgNi-P/Al 2 O 3 catalysts were prepared. The Zn/Mg molar ratio affected the formation of Ni 2 P and Ni 12 P 5 in nickel phosphides. The ZnMgNi-P/Al 2 O 3 catalyst with a Zn/Mg molar ratio of 3:1 exhibits the best dibenzothiophene hydrodesulfurization (HDS) activity. Compared with the Ni-P/Al 2 O 3 catalyst prepared from the impregnation method, the ZnMgNi-P/Al 2 O 3 catalyst shows a higher HDS activity (81.6% vs. 54.3%) and promotes the direct desulfurization of dibenzothiophene.

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Section: Catalystsupporting

confidence: 68%

High Active Zn/Mg-Modified Ni–P/Al2O3 Catalysts Derived from ZnMgNiAl Layered Double Hydroxides for Hydrodesulfurization of Dibenzothiophene

et al. 2017

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“…According to earlier studies treatment temperatures, higher than that required to generate Ni 2 P phase, was found to result in lowered Ni 2 P dispersion and, as a consequence, in lower hydroconversion activity [11,12]. The TPR results were used to determine the preferable lowest temperature of precursor-to-catalyst conversion and also the H 2 demand of the process.…”

Section: Temperature-programmed Reduction By Hydrogen (H 2 -Tpr)mentioning

confidence: 99%

A study of the hydrodenitrogenation of propylamine over supported nickel phosphide catalysts using amorphous and nanostructured silica supports

Badari

Lónyi

Drotár

et al. 2015

Applied Catalysis B: Environmental

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Pyrolysis of animal by-products provides pyro-oil that contains about 10 wt% nitrogen mainly in aliphatic compounds and virtually no sulfur. The nitrogen should be removed from the oil preferably by hydrodenitrogenation (HDN) to obtain liquid fuel and ammonia. In order to understand the catalytic HDN processes of such bio-oils the HDN of propylamine (PA) was studied as model reaction over silica-supported Ni 2 P and Ni catalysts. Catalysts were prepared by H 2 -reduction of catalyst precursor NiO/phosphated silica gel and NiO/phosphated SBA-15 silica material and NiO/silica gel. The catalyst surface was characterized by Diffuse Reflectance Infrared Fourier Transform Spectroscopic (DRIFTS) examination of adsorbed CO. It was shown that the Ni 2 P particles had a highly defected structure in the initial reduced state of the catalyst but were rapidly converted to ordered crystals in contact with PA under reaction conditions. The HDN reaction of PA was studied using a flow-through tube reactor

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“…ACES HDS activity; therefore, selecting an appropriate reduction atmosphere to lower the reduction temperature is momentous. Non-noble metal phosphides have highly HDS activity which is higher than normal Co(Ni)Mo(W)S. Particularly, the activity of crystalline Ni 2 P is the highest among them because of its higher intrinsic activity and dispersion degree compared to the other phosphides [10]; Another advantage of Ni 2 P is its HDS activity will not be inhibited with the competition of HDN (hydrodenitrification) [4,6,10]. Inversely, the HDS activity of Co(Ni)Mo(W)S would be restricted due to the competition of nitrogen compounds in H and the edges of active phase [35].…”

Section: Non-noble Metal Phosphide and Noble Metal Phosphidementioning

confidence: 99%

“…If the ratio is too high, there will be more formation of low active Ni 12 P 5 . In general, this ratio is between 1.2 -1.4 [6,13,14,36], and is lower than the ideal ratio 2.…”

Section: Non-noble Metal Phosphide and Noble Metal Phosphidementioning

confidence: 99%

Advancement of Hydro-Desulfurization Catalyst and Discussion of Its Application in Coal Tar

Liu¹,

Zhang²,

Jiang³

et al. 2013

ACES

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This paper describes the influences of active metal, promoter and chelating agent on the properties of hydro-desulfurization catalyst. The use of chelating agent, especially its combination with common promoters e.g., EDTA-P, has an important meaning to develop highly active catalyst, specifically to unify the active metal dispersion degree and sulfurization degree in some extent, however, they are contradictory in conventional cognition. In the aspect of carriers, composition and nanometer carriers have more excellent performances in acidity, pores structure and metal-carrier interaction than common carriers, and are the developing trend in the future and should be a breakthrough mainly in preparation methods. We also pointed out the decisive factors to improve the activity of the catalyst: higher sulfurization degree of active metal oxide and higher aspect ratios of active phase crystal morphology, and the proper acidity and pores structure can be considered the key factors for deep desulfurization whose mainly obstacle is the desulfurization of large rigid molecules, e.g., dibenzothiophene and 4, 6-dimethyl substituted dibenzothiophene. Based on above that, We discussed the suitable hydrodesulfurization (HDS) catalyst for coal tar, aiming at providing some theoretical guidance for the "design" of coal tar HDS catalyst.

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A highly loaded and dispersed Ni2P/SiO2 catalyst for the hydrotreating reactions

Cited by 31 publications

References 27 publications

High Active Zn/Mg-Modified Ni–P/Al2O3 Catalysts Derived from ZnMgNiAl Layered Double Hydroxides for Hydrodesulfurization of Dibenzothiophene

High Active Zn/Mg-Modified Ni–P/Al2O3 Catalysts Derived from ZnMgNiAl Layered Double Hydroxides for Hydrodesulfurization of Dibenzothiophene

A study of the hydrodenitrogenation of propylamine over supported nickel phosphide catalysts using amorphous and nanostructured silica supports

Advancement of Hydro-Desulfurization Catalyst and Discussion of Its Application in Coal Tar

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