Hydroprocessing of soybean oil on nickel-phosphide supported catalysts

Zarchin, Ruby; Rabaev, Moshe; Vidruk-Nehemya, Roxana; Landau, Miron V.; Herskowitz, M.

doi:10.1016/j.fuel.2014.09.053

Cited by 101 publications

(36 citation statements)

References 41 publications

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“…HDO of triglycerides, fatty esters and acids produce an oxygen-free mixture of alkanes which are the valuable components compatible with petroleum-based motor fuels [6]. In recent years transition metal phosphide systems have proved to be the promising catalysts in HDO of fatty acid methyl esters [7][8][9][10][11][12][13][14][15][16], fatty acids [17] and vegetable oils [5,18] as well as in co-hydroprocessing of vegetable oils and gas oil mixture [19]. Among a number of transition metal phosphides the silica-supported nickel phosphide catalysts were found to display a higher activity in HDO of aliphatic ether [7], which is converted through the complicated scheme with the participation of acid-catalyzed and metal-catalyzed reactions [7,12,14,15,20,21].…”

Section: Introductionmentioning

confidence: 99%

“…It was stated that the initial Ni/P molar ratio has a profound effect on the structure and catalytic activity of the supported nickel phosphide catalysts obtained with a conventional preparation method by temperature-programmed reduction (TPR) of nickel phosphate precursors [7,8,12,17,18,29,31,33]. Stinner et al [29] have reported that Ni/P molar ratio equal to 2 leads to the formation of Ni 12 P 5 and Ni 3 P phases over silica, Ni/P molar ratio equal to 1.7 leads to Ni 12 P 5 and Ni 2 P phases, and Ni/P molar ratio = 1.5 favors Ni 2 P phase only.…”

Section: Introductionmentioning

confidence: 99%

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HDO of Methyl Palmitate over Silica-Supported Ni Phosphides: Insight into Ni/P Effect

et al. 2017

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Two sets of silica-supported nickel phosphide catalysts with a nickel content of about 2.5 and 10 wt % and Ni/P molar ratio 2/1, 1/1 and 1/2 in each set, were prepared by way of a temperature-programmed reduction method using (Ni(CH 3 COO) 2 ) and ((NH 4 ) 2 HPO 4 ) as a precursor. The Ni x P y /SiO 2 catalysts were characterized using chemical analysis N 2 physisorption, XRD, TEM, 31 P MAS NMR. Methyl palmitate hydrodeoxygenation (HDO) was performed in a trickle-bed reactor at 3 MPa and 290 • C with LHSV ranging from 0.3 to 16 h −1 . The Ni/P ratio was found to affect the nickel phosphide phase composition, PO x groups content and catalytic properties in methyl palmitate HDO with the TOF increased along with a decline of Ni/P ratio and a growth of PO x groups' content. Taking into account the possible routes of methyl palmitate conversion (metal-catalyzed hydrogenolysis or acid-catalyzed hydrolysis), we proposed that the enhancement of acid PO x groups' content with the Ni/P ratio decrease provides an enhancement of the rate of methyl palmitate conversion through the acceleration of acid-catalyzed hydrolysis.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

HDO of Methyl Palmitate over Silica-Supported Ni Phosphides: Insight into Ni/P Effect

et al. 2017

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“…To avoid the disadvantages of supported noble metals and sulphide catalysts, several new types of systems containing supported base metals, preferentially Ni [13,[34][35][36][37][38][39], or base metal carbides [40][41][42], nitrides [43], and phosphides [44][45][46][47][48][49][50][51][52][53][54] were investigated in HDO. In particular, the nickel phosphide catalysts exhibit the high activity and stability in the HDO of model compounds [44,46,48,50,[55][56][57][58][59][60][61][62][63][64][65][66] and vegetable oils [51,67], as well as in co-hydrotreatment of renewable oils with petroleum-derived distillates [68].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the nickel phosphide catalysts exhibit the high activity and stability in the HDO of model compounds [44,46,48,50,[55][56][57][58][59][60][61][62][63][64][65][66] and vegetable oils [51,67], as well as in co-hydrotreatment of renewable oils with petroleum-derived distillates [68].…”

Section: Introductionmentioning

confidence: 99%

Synergetic Effect of Ni2P/SiO2 and γ-Al2O3 Physical Mixture in Hydrodeoxygenation of Methyl Palmitate

et al. 2017

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Abstract:The Ni 2 P/SiO 2 catalyst, which was prepared by in situ temperature-programmed reduction and in the mixture with the inert (SiC, SiO 2 ) or acidic (γ-Al 2 O 3 ) material was studied in methyl palmitate hydrodeoxygenation (HDO). Methyl palmitate HDO was carried out at temperatures of 270-330 • C, H 2 /feed volume ratio of 600 Nm 3 /m 3 , and H 2 pressure of 3.0 MPa. Ni 2 P/SiO 2 catalyst, diluted with γ-Al 2 O 3 showed a higher activity than Ni 2 P/SiO 2 catalyst diluted with SiC or SiO 2 . The conversion of methyl palmitate increased significantly in the presence of γ-Al 2 O 3 most probably due to the acceleration of the acid-catalyzed reaction of ester hydrolysis. The synergism of Ni 2 P/SiO 2 and γ-Al 2 O 3 in methyl palmitate HDO can be explained by the cooperation of the metal sites of Ni 2 P/SiO 2 and the acid sites of γ-Al 2 O 3 in consecutive metal-catalyzed and acid-catalyzed reactions of HDO. The obtained results let us conclude that the balancing of metal and acid sites plays an important role in the development of the efficient catalyst for the HDO of fatty acid esters over supported phosphide catalysts.

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“…Compared to microcrystalline zeolites, the nanocrystalline zeolites had a higher surface area (525 m 2 /g for nanocrystalline zeolite beta and 1126 m 2 /g for nanocrystalline zeolite Y, respectively) and exhibited a higher conversion of used palm oil. Zarchin et al [22] studied the hydroprocessing of soybean oil over Ni 2 P/HY catalyst. The water vapors generated by hydrodeoxygenation reaction reduced the acidity of the Ni 2 P/HY catalyst, thus reducing the hydrocracking activity.…”

Section: Introductionmentioning

confidence: 99%

Review of Heterogeneous Catalysts for Catalytically Upgrading Vegetable Oils into Hydrocarbon Biofuels

et al. 2017

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Abstract:To address the issues of greenhouse gas emissions associated with fossil fuels, vegetable oilseeds, especially non-food oilseeds, are used as an alternative fuel resource. Vegetable oil derived from these oilseeds can be upgraded into hydrocarbon biofuel. Catalytic cracking and hydroprocessing are two of the most promising pathways for converting vegetable oil to hydrocarbon biofuel. Heterogeneous catalysts play a critical role in those processes. The present review summarizes current progresses and remaining challenges of vegetable oil upgrading to biofuel. The catalyst properties, applications, deactivation, and regeneration are reviewed. A comparison of catalysts used in vegetable oil and bio-oil upgrading is also carried out. Some suggestions for heterogeneous catalysts applied in vegetable oil upgrading to improve the yield and quality of hydrocarbon biofuel are provided for further research in the future.

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Hydroprocessing of soybean oil on nickel-phosphide supported catalysts

Cited by 101 publications

References 41 publications

HDO of Methyl Palmitate over Silica-Supported Ni Phosphides: Insight into Ni/P Effect

HDO of Methyl Palmitate over Silica-Supported Ni Phosphides: Insight into Ni/P Effect

Synergetic Effect of Ni2P/SiO2 and γ-Al2O3 Physical Mixture in Hydrodeoxygenation of Methyl Palmitate

Review of Heterogeneous Catalysts for Catalytically Upgrading Vegetable Oils into Hydrocarbon Biofuels

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