Renewable Hydrocarbon Production via Rapeseed Oil Hydrotreatment Over Palladium Catalysts

Abstract The effect of SiO2-Al2O3 (Pd5%/SA), activated carbon (Pd5%/C) and Al2O3 (Pd5%/A) supported palladium (5%) catalysts on renewable hydrocarbon synthesis via rapeseed oil hydrotreatment was investigated. The hydrotreatment experiments were carried out in solvent free medium under initial H2 pressure 100 bar and at 340 °C temperature for 120 min using catalyst amount 5%. Gas chromatography-mass spectrometry (GC/MS) analysis were used for estimation of hydrocarbon content in the obtained samples. Pd5%/SA catalyst provided complete conversion of rapeseed oil into marketable liquid renewable hydrocarbons without presence of oxygen containing substances under studied hydrotreatment conditions. Moreover, all tested Pd catalysts gave narrow range of linear saturated hydrocarbons (n-C15-C19). Pd5%/C and Pd5%/A catalysts gave partial feedstock conversion into hydrocarbons even in long residence time. Overall liquid hydrocarbon yields were from 55.3% to 82.3%.

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Altervalent cation-doped MCM-41 supported palladium catalysts and their catalytic properties

Journal of the Serbian Chemical Society ◽

10.2298/jsc100227073j ◽

2011 ◽

Vol 76 (6) ◽

pp. 923-932 ◽

Cited By ~ 3

Author(s):

Haihui Jiang ◽

Ligang Gai ◽

Yan Tian

Keyword(s):

Electron Microscopy ◽

Palladium Catalysts ◽

Xrd Analysis ◽

Molar Ratio ◽

Pd Catalysts ◽

Transmission Electron ◽

Supported Pd Catalysts ◽

Supported Palladium ◽

Mcm 41 ◽

Supported Pd

Metal cation-doped MCM-41 (M-MCM-41, M=Al, Ce, Co, V, or Zr) supported Pd catalysts (Pd/M-MCM-41) were prepared by a solution-based reduction method. The catalysts were characterized by Xray diffraction (XRD) analysis, infrared spectroscopy (IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and further evaluated by selective hydrogenation of parachloronitrobenzene (p-CNB) in anhydrous ethanol. The metal cationcontaining Pd catalysts can efficiently enhance the selectivity for parachloroaniline (p-CAN). The highest selectivity of 96.5 % in the molar distribution for p-CNB to p-CAN was acquired over Pd (1.8 wt. %)/VMCM- 41 (Si/V=30, molar ratio) catalyst, and the corresponding turnover frequency (TOF) was 1.24?10-2 mol p-CNB mol-1 Pd s-1. Water molecules adsorbed by the support have important effects on both the catalytic activity of the sample and the selectivity for p-CAN. A water molecule-mediated catalytic hydrogenation is discussed.

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Pd Catalysts Supported on Bamboo-Like Nitrogen-Doped Carbon Nanotubes for Hydrogen Production

Energies ◽

10.3390/en14051501 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1501

Author(s):

Arina N. Suboch ◽

Olga Y. Podyacheva

Keyword(s):

Carbon Nanotubes ◽

Hydrogen Production ◽

Metallic Nanoparticles ◽

Palladium Catalysts ◽

Fold Increase ◽

Maximum Activity ◽

Pd Catalysts ◽

Nitrogen Doped ◽

Supported Palladium ◽

Nitrogen Doped Carbon

Bamboo-like nitrogen-doped carbon nanotubes (N-CNTs) were used to synthesize supported palladium catalysts (0.2–2 wt.%) for hydrogen production via gas phase formic acid decomposition. The beneficial role of nitrogen centers of N-CNTs in the formation of active isolated palladium ions and dispersed palladium nanoparticles was demonstrated. It was shown that although the surface layers of N-CNTs are enriched with graphitic nitrogen, palladium first interacts with accessible pyridinic centers of N-CNTs to form stable isolated palladium ions. The activity of Pd/N-CNTs catalysts is determined by the ionic capacity of N-CNTs and dispersion of metallic nanoparticles stabilized on the nitrogen centers. The maximum activity was observed for the 0.2% Pd/N-CNTs catalyst consisting of isolated palladium ions. A ten-fold increase in the concentration of supported palladium increased the contribution of metallic nanoparticles with a mean size of 1.3 nm and decreased the reaction rate by only a factor of 1.4.

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Replacement reaction-based synthesis of supported palladium catalysts with atomic dispersion for catalytic removal of benzene

Journal of Materials Chemistry A ◽

10.1039/c8ta05159c ◽

2018 ◽

Vol 6 (35) ◽

pp. 17032-17039 ◽

Cited By ~ 10

Author(s):

Linlin Xu ◽

Dong Chen ◽

Jianglan Qu ◽

Liyang Wang ◽

Jiayi Tang ◽

...

Keyword(s):

Palladium Catalysts ◽

Catalytic Performance ◽

Replacement Reaction ◽

Pd Catalysts ◽

Supported Palladium Catalysts ◽

Supported Pd Catalysts ◽

Supported Palladium ◽

Catalytic Removal ◽

Oxidation Of Benzene ◽

Supported Pd

Supported Pd catalysts with atomic dispersion in CuO show high catalytic performance for the oxidation of benzene at mild temperatures.

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Aerobic oxidation of cyclohexanones to phenols and aryl ethers over supported Pd catalysts

Organic Chemistry Frontiers ◽

10.1039/c4qo00354c ◽

2015 ◽

Vol 2 (6) ◽

pp. 654-660 ◽

Cited By ~ 19

Author(s):

Zhenzhong Zhang ◽

Taishin Hashiguchi ◽

Tamao Ishida ◽

Akiyuki Hamasaki ◽

Tetsuo Honma ◽

...

Keyword(s):

Palladium Catalysts ◽

Aerobic Oxidation ◽

Pd Catalysts ◽

Supported Palladium Catalysts ◽

Supported Pd Catalysts ◽

Supported Palladium ◽

Aryl Ethers ◽

Supported Pd

ZrO2 supported palladium catalysts promoted the aerobic oxidation of cyclohexanones to give phenols and aryl ethers.

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Model reactions for the study of hydrogenation and acidic activity of palladium catalysts

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19872019 ◽

1987 ◽

Vol 52 (8) ◽

pp. 2019-2027 ◽

Cited By ~ 1

Author(s):

Libor Červený ◽

Nguyen Thi Du ◽

Ivo Paseka

Keyword(s):

Palladium Catalysts ◽

Styrene Oxide ◽

Side Reactions ◽

Pd Catalysts ◽

Variable Parameters ◽

Acid Properties ◽

Liquid Phase Hydrogenation ◽

Acid Catalysed Reactions ◽

Different Content ◽

Model Reactions

Palladium catalysts have been used to study the hydrogenation of 1-phenyl-2-butene-1-ol which is accompanied by several side reactions considered to be acid-catalysed. Another model reaction studied was dehydration and subsequent hydrogenation or hydrogenolysis of 1-phenyl-1,3-propanediol to 3-phenyl-1-propanol, accompanied by formation of propylbenzene. The dehydration and propylbenzene formation can be again classified as acid-catalysed reactions. Another one is methanolysis of styrene oxide taking place under conditions of liquid phase hydrogenation due to the acid properties of Pd-H systems. Hydrogenation activity of Pd catalysts was tested by hydrogenation of cyclohexene. Sixteen Pd catalysts on different supports and with different content of active component were used, their activity and selectivity was determined and the effect of variable parameters in the synthesis of these catalysts on the activity and selectivity is discussed.

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Improved methane oxidation activity of P-doped γ-Al2O3 supported palladium catalysts by tailoring the oxygen mobility and electronic properties

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2019.08.237 ◽

2019 ◽

Vol 44 (51) ◽

pp. 27772-27783 ◽

Cited By ~ 5

Author(s):

Xiaohua Chen ◽

Yong Zheng ◽

Yelin Chen ◽

Yalan Xu ◽

Fulan Zhong ◽

...

Keyword(s):

Electronic Properties ◽

Methane Oxidation ◽

Palladium Catalysts ◽

Oxygen Mobility ◽

Oxidation Activity ◽

Supported Palladium Catalysts ◽

Supported Palladium

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Development of palladium catalysts modified by ruthenium and molybdenum as anode in direct ethanol fuel cell

Materials for Renewable and Sustainable Energy ◽

10.1007/s40243-020-00187-1 ◽

2021 ◽

Vol 10 (1) ◽

Author(s):

Yonis Fornazier Filho ◽

Ana Caroliny Carvalho da Cruz ◽

Rolando Pedicini ◽

José Ricardo Cezar Salgado ◽

Priscilla Paiva Luz ◽

...

Keyword(s):

Catalytic Activity ◽

Palladium Catalysts ◽

Carbon Support ◽

X Ray Diffraction ◽

Direct Ethanol Fuel Cell ◽

Pd Catalysts ◽

Bifunctional Mechanism ◽

Catalytic Activities ◽

Intrinsic Mechanism ◽

Ternary Catalysts

AbstractPhysical and electrochemical properties of Pd catalysts combined with Ru and Mo on carbon support were investigated. To this end, Pd, Pd1.3Ru1.0, Pd3.2Ru1.3Mo1.0 and Pd1.5Ru0.8Mo1.0 were synthesized on Carbon Vulcan XC72 support by the method of thermal decomposition of polymeric precursors and then physically and electrochemically characterized. The highest reaction yields are obtained for Pd3.2Ru1.3Mo1.0/C and Pd1.5Ru0.8Mo1.0/C and, as demonstrated by thermal analysis, they also show the smallest metal/carbon ratio compared the other catalysts. XRD (X-ray Diffraction) and Raman analyses show the presence of PdO and RuO2 for the Pd/C and the Pd1.3Ru1.0/C catalysts, respectively, a fact not observed for the Pd3.2Ru1.3 Mo1.0 /C and the Pd1.5Ru0.8Mo1.0/C catalysts. The catalytic activities were tested for the ethanol oxidation in alkaline medium. Cyclic voltammetry (CV) shows Pd1.3Ru1.0/C exhibiting the highest peak of current density, followed by Pd3.2Ru1.3Mo1.0/C, Pd1.5Ru0.8Mo1.0/C and Pd/C. From, chronoamperometry (CA), it is possible to observe the lowest rate of poisoning for the Pd1.3Ru1.0/C, followed by Pd3.2Ru1.3Mo1.0/C, Pd1.5Ru0.8Mo1.0/C and Pd/C. These results suggested that catalytic activity of the binary and the ternary catalysts are improved in comparison with Pd/C. The presence of RuO2 activated the bifunctional mechanism and improved the catalytic activity in the Pd1.3Ru1.0/C catalyst. The addition of Mo in the catalysts enhanced the catalytic activity by the intrinsic mechanism, suggesting a synergistic effect between metals. In summary, we suggest that it is possible to synthesize ternary PdRuMo catalysts supported on Carbon Vulcan XC72, resulting in materials with lower poisoning rates and lower costs than Pd/C. Graphic abstract

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Nanostructured supported palladium catalysts—Non-oxidative methane coupling

Applied Catalysis A General ◽

10.1016/j.apcata.2011.10.025 ◽

2012 ◽

Vol 411-412 ◽

pp. 105-113 ◽

Cited By ~ 12

Author(s):

Silvia F. Moya ◽

Ruth L. Martins ◽

Antje Ota ◽

Edward L. Kunkes ◽

Malte Behrens ◽

...

Keyword(s):

Palladium Catalysts ◽

Methane Coupling ◽

Supported Palladium Catalysts ◽

Oxidative Methane Coupling ◽

Supported Palladium

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Particle size effects in the selective hydrogenation of cinnamaldehyde over supported palladium catalysts

RSC Advances ◽

10.1039/c6ra17000e ◽

2016 ◽

Vol 6 (79) ◽

pp. 75541-75551 ◽

Cited By ~ 37

Author(s):

Feng Jiang ◽

Jian Cai ◽

Bing Liu ◽

Yuebing Xu ◽

Xiaohao Liu

Keyword(s):

Particle Size ◽

Size Effect ◽

Selective Hydrogenation ◽

Size Effects ◽

Palladium Catalysts ◽

Particle Size Effect ◽

Particle Size Effects ◽

Supported Palladium Catalysts ◽

Supported Palladium ◽

Palladium Particles

Palladium particles of different sizes obtained directly and indirectly by various methods were studied to clarify the particle size effect in the selective hydrogenation of cinnamaldehyde (CAL).

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