Influence of Mo on catalytic activity of Ni-based catalysts in hydrodeoxygenation of esters

Кукушкин, Р. Г.; Булавченко, О. А.; Каичев, В. В.; Yakovlev, V. А.

doi:10.1016/j.apcatb.2014.08.001

Cited by 111 publications

(65 citation statements)

References 38 publications

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“…However, it is also well possible that Mo in intermediate oxidation states have (in combination with Ni) a positive effect on activity by activation of oxygenated species. Evidence for the latter has been reported for the hydrodeoxygenation of esters using Mo-supported Ni catalysts [59]. In addition, the high acidity of the support compared to the monometallic Ni and bimetallic Ni-Cu may also play a role and affect the performance of the catalyst.…”

Section: Catalyst Selectionmentioning

confidence: 94%

Mono-, bi-, and tri-metallic Ni-based catalysts for the catalytic hydrotreatment of pyrolysis liquids

Wang

Venderbosch

et al. 2017

Biomass Conv. Bioref.

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Catalytic hydrotreatment is a promising technology to convert pyrolysis liquids into intermediates with improved properties. Here, we report a catalyst screening study on the catalytic hydrotreatment of pyrolysis liquids using bi-and tri-metallic nickel-based catalysts in a batch autoclave (initial hydrogen pressure of 140 bar, 350°C, 4 h). The catalysts are characterized by a high nickel metal loading (41 to 57 wt%), promoted by Cu, Pd, Mo, and/or combination thereof, in a SiO 2 , SiO 2 -ZrO 2 , or SiO 2 -Al 2 O 3 matrix. The hydrotreatment results were compared with a benchmark Ru/C catalyst. The results revealed that the monometallic Ni catalyst is the least active and that particularly the use of Mo as the promoter is favored when considering activity and product properties. For Mo promotion, a product oil with improved properties viz. the highest H/C molar ratio and the lowest coking tendency was obtained. A drawback when using Mo as the promoter is the relatively high methane yield, which is close to that for Ru/C. 1 H, 13 C-NMR, heteronuclear single quantum coherence (HSQC), and two-dimensional gas chromatography (GC × GC) of the product oils reveal that representative component classes of the sugar fraction of pyrolysis liquids like carbonyl compounds (aldehydes and ketones and carbohydrates) are converted to a large extent. The pyrolytic lignin fraction is less reactive, though some degree of hydrocracking is observed.

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Section: Catalyst Selectionmentioning

confidence: 94%

Mono-, bi-, and tri-metallic Ni-based catalysts for the catalytic hydrotreatment of pyrolysis liquids

Wang

Venderbosch

et al. 2017

Biomass Conv. Bioref.

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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%

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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“…pyrolysis or gasification) were reported [13][14][15][16][17], such as aqueous phase catalysis, which was a promising technology for direct conversion of sorbitol to liquid fuels [1,[18][19][20]. Dumesic and co-workers developed a process via the selective conversion of glucose and sorbitol firstly into monofunctional hydrocarbons, then further transferring to hydrocarbon fuel over heterogeneous catalysts [21].…”

Section: Introductionmentioning

confidence: 99%

One-pot aqueous phase catalytic conversion of sorbitol to gasoline over nickel catalyst

Weng

Qiu

et al. 2015

Energy Conversion and Management

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Influence of Mo on catalytic activity of Ni-based catalysts in hydrodeoxygenation of esters

Cited by 111 publications

References 38 publications

Mono-, bi-, and tri-metallic Ni-based catalysts for the catalytic hydrotreatment of pyrolysis liquids

Mono-, bi-, and tri-metallic Ni-based catalysts for the catalytic hydrotreatment of pyrolysis liquids

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

One-pot aqueous phase catalytic conversion of sorbitol to gasoline over nickel catalyst

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