Study on palm oil hydrogenation for clean fuel over Ni–Mo–W/γ-Al 2 O 3 –ZSM-5 catalyst

Wang, Hongyan; Jiao, Tiantian; Li, Zengxi; Li, Chunshan; Zhang, Suojiang; Zhang, Jianling

doi:10.1016/j.fuproc.2015.08.004

Cited by 38 publications

(15 citation statements)

References 39 publications

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“…Ni, Pd, and Pt prefer DCO/DCO 2 , while Co prefers HDO. Wang et al analyzed the effect of tungsten as a promoter in a NiMoW/γ-Al 2 O 3 catalyst; the effect of a 15 wt% addition of ZSM-5 in γ-Al 2 O 3 was also studied [ 148 ]. From the catalysts’ screening, the authors observed that the NiMoW/γ-Al 2 O 3 -ZSM-5 catalyst was the most active, leading to high diesel selectivity.…”

Section: Feedstockmentioning

confidence: 99%

Green Diesel Production by Catalytic Hydrodeoxygenation of Vegetables Oils

Nolfi

Gallucci

Rossi

2021

IJERPH

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Non-renewable fossil fuels and the air pollution associated with their combustion have made it necessary to develop fuels that are environmentally friendly and produced from renewable sources. In addition, global warming and climate change have brought to the attention of many countries the need to develop programs and reforms, such as the 2030 Agenda of the United Nations and the European Green Deal, that finance and promote the conversion of all socio-economic activities in favor of sustainable and environmentally friendly development. These major projects include the development of non-polluting biofuels derived from renewable sources. Vegetable oils are a renewable source widely used to produce biofuels due to their high energy density and similar chemical composition to petroleum derivatives, making them the perfect feedstock for biofuel production. Green diesel and other hydrocarbon biofuels, obtained by the catalytic deoxygenation of vegetable oils, represent a sustainable alternative to mineral diesel, as they have physico-chemical properties similar to derived oil fuels. The catalyst, temperature, hydrogen pressure, and the type of vegetable oil can influence the type of biofuel obtained and its properties. The main aspects discussed in this review include the influence of the catalyst and reaction conditions on the catalytic deoxygenation reaction.

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Section: Feedstockmentioning

confidence: 99%

Green Diesel Production by Catalytic Hydrodeoxygenation of Vegetables Oils

Nolfi

Gallucci

Rossi

2021

IJERPH

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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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“…By decreasing WHSV from 23.4 hr −1 to 3.3 hr −1 , phenol conversion was increased from 18 mol% to 28.4 mol% at 454 K. The increase in phenol conversion with the decrease in WHSV was also observed with other reaction temperatures. This is because a lower WHSV enabled a longer contact time of phenol with active sites for HDO reaction . Average contact time can be determined as follows:

italicContact time ((), s) = \frac{italicQuantity of active sites ((), italicμmol / italicg) italicx italicCatalyst weight ((), g)}{italicAverage reactant flowrate ((), italicμmol / italics)} .

Based on H 2 chemisorption analysis, Ag/TiO 2 catalyst has a 0.0861 mmol/g of Ag active sites.…”

Section: Resultsmentioning

confidence: 99%

Atmospheric hydrodeoxygenation of phenol as pyrolytic‐oil model compound for hydrocarbon production using Ag/TiO₂ catalyst

Lup

Abnisa

Daud

et al. 2019

Asia-Pacific J Chem Eng

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Hydrodeoxygenation (HDO) kinetics of phenol over Ag/TiO 2 catalyst was investigated at 415-600 K and 1 atm. The use of oxophilic TiO 2 support has improved phenol conversion due to its preferential activation of C-O bond.Product analysis confirmed the occurrence of direct deoxygenation (DDO) and hydrogenation-dehydration (HYD) pathways to produce benzene and cyclohexane, respectively. Both phenol hydrogenolysis and hydrogenation steps are the respective rate-limiting steps for DDO and HYD pathways of phenol HDO over Ag/TiO 2 . Based on the transition state theory, negative entropy changes of activation during HDO indicated that the HDO reactants formed activated complexes that had more orderly bonding configurations prior to the hydrogenolysis, hydrogenation, and dehydration steps. Under the present conditions, the catalyst was stable after 4 hr of HDO runs and able to be regenerated via H 2 -activation and calcination in air at 553 K with at least 98.9% removal efficiency to remove coke deposits and reform Ag metal species after HDO.

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Study on palm oil hydrogenation for clean fuel over Ni–Mo–W/γ-Al 2 O 3 –ZSM-5 catalyst

Cited by 38 publications

References 39 publications

Green Diesel Production by Catalytic Hydrodeoxygenation of Vegetables Oils

Green Diesel Production by Catalytic Hydrodeoxygenation of Vegetables Oils

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

Atmospheric hydrodeoxygenation of phenol as pyrolytic‐oil model compound for hydrocarbon production using Ag/TiO₂ catalyst

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Study on palm oil hydrogenation for clean fuel over Ni–Mo–W/γ-Al 2 O 3 –ZSM-5 catalyst

Cited by 38 publications

References 39 publications

Green Diesel Production by Catalytic Hydrodeoxygenation of Vegetables Oils

Green Diesel Production by Catalytic Hydrodeoxygenation of Vegetables Oils

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

Atmospheric hydrodeoxygenation of phenol as pyrolytic‐oil model compound for hydrocarbon production using Ag/TiO2 catalyst

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Atmospheric hydrodeoxygenation of phenol as pyrolytic‐oil model compound for hydrocarbon production using Ag/TiO₂ catalyst