scholarly journals Preparation and catalytic performance of active metal sintered membrane reactor anchored with Pt atoms

RSC Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 2848-2853
Author(s):  
Xiaoliang Ren ◽  
Shufang Wang ◽  
Xiaoshu Ding ◽  
Dongsheng Zhang ◽  
Yanji Wang
Keyword(s):  
Liquid Phase ◽  
Membrane Reactor ◽  
Catalytic Performance ◽  
Nitroaromatic Compounds ◽  
Liquid Phase Hydrogenation ◽  
Active Metal ◽  
Excellent Catalytic Performance

A novel, active metal sintered membrane reactor anchored with Pt atoms was successfully developed. The membrane reactor exhibited excellent catalytic performance and stability towards continuous liquid-phase hydrogenation of nitroaromatic compounds.

Tuning the surface structure and catalytic performance of PdIn/Al2O3 in selective liquid-phase hydrogenation by mild oxidative-reductive treatments

2018 ◽  
Vol 28 (6) ◽  
pp. 603-605 ◽  
Author(s):  
Igor S. Mashkovsky ◽  
Nadezhda S. Smirnova ◽  
Pavel V. Markov ◽  
Galina N. Baeva ◽  
Galina O. Bragina ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Surface Structure ◽  
Catalytic Performance ◽  
Liquid Phase Hydrogenation

Hydrogenation of Ethylbenzene Over Ru/γ-Al2O3 Catalyst in Trickle-Bed Reactor

2021 ◽  
Vol 21 (7) ◽  
pp. 4116-4120
Author(s):  
Seung Kyo Oh ◽  
Huiji Ku ◽  
Gi Bo Han ◽  
Byunghun Jeong ◽  
Young-Kwon Park ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Active Sites ◽  
Catalytic Performance ◽  
Hydrogenation Reaction ◽  
Impregnation Method ◽  
Average Pore ◽  
Wet Impregnation ◽  
Trickle Bed Reactor ◽  
Liquid Phase Hydrogenation ◽  
Trickle Bed

The objective of this study is to evaluate the catalytic performance of pellet-type Ru/γ-Al2O3 as a catalyst during liquid-phase hydrogenation of the aromatic hydrocarbon. The Ru/γ-Al2O3 catalyst was prepared using a wet impregnation method. After adding a binder to Ru/γ-Al2O3, a pellet-type catalyst was obtained through an extrusion method. Nanoporous structures are well developed in the pellet-type Ru/γ-Al2O3 catalyst. The average pore sizes of the Ru/γ-Al2O3 catalysts were approximately 10 nm. The catalytic performance of the pellet-type Ru/γ-Al2O3 catalyst during ethylbenzene hydrogenation was evaluated in a trickle-bed reactor. When the ruthenium loading increased from 1 to 5 wt%, the number of active sites effective for the hydrogenation of ethylbenzene increased proportionally. In order to maximize the conversion of ethylbenzene to ethylcyclohexane, it was necessary to maintain a liquid phase hydrogenation reaction in the trickle bed reactor. In this regards, the reaction temperature should be lower than 90 °C. The conversion of ethylbenzene to ethylcyclohexane on the Ru(5 wt%)/γ-Al2O3 catalyst was highest, which is ascribed to the largest number of active sites of the catalyst.

Engineering CuOx–ZrO2–CeO2 nanocatalysts with abundant surface Cu species and oxygen vacancies toward high catalytic performance in CO oxidation and 4-nitrophenol reduction

CrystEngComm ◽  
2020 ◽  
Vol 22 (23) ◽  
pp. 4005-4013 ◽  
Author(s):  
Baolin Liu ◽  
Yizhao Li ◽  
Shaojun Qing ◽  
Kun Wang ◽  
Jing Xie ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxygen Vacancies ◽  
Catalytic Performance ◽  
Solvent Free ◽  
Metal Species ◽  
Synthetic Strategy ◽  
Nitrophenol Reduction ◽  
Active Metal ◽  
Excellent Catalytic Performance

CuOx–ZrO2–CeO2 nanocrystalline catalysts were designed and synthesized by a solvent-free synthetic strategy, and exhibited excellent catalytic performance owing to the increased oxygen vacancies and better dispersed active metal species.

scholarly journals NICKEL CATALYTIC PROPERTIES IN REACTION OF LIQUID-PHASE HYDROGENATION OF CARBON-CARBON DOUBLE BOND

2017 ◽  
Vol 60 (6) ◽  
pp. 95
Author(s):  
Andreiy V. Afineevskii ◽  
Dmitriy A. Prozorov ◽  
Mikhail V. Lukin ◽  
Tatiana Yu. Osadchaya ◽  
Yaroslav P. Sukhachev
Keyword(s):  
Double Bond ◽  
Liquid Phase ◽  
Nickel Catalyst ◽  
Raney Nickel ◽  
Catalytic Properties ◽  
Supported Nickel Catalyst ◽  
Liquid Phase Hydrogenation ◽  
Carbon Double Bond ◽  
Active Metal ◽  
Wide Range

The hydrogenating of carbon-carbon double bond in a molecule of sodium maleate over a partially deactivated catalysts based on nickel in a water solution at atmospheric pressure was investigated. Kinetic regularities of the investigated processes were obtained. It was found that sulfide additives lead to the decrease in an order of the reaction for both skeletal and supported nickel catalysts, however, the correlation of activity versus the amounts of sulfur introduced is complex and independent on the amount of active metal on the catalyst surface. We proposed the method for the synthesis of a supported nickel catalyst resistant to oxidation with atmospheric oxygen and an activity of the one is more than twice better then activity of Raney nickel. The stability of the nickel catalyst (Raney nickel and nickel supported on silica) in the presence of sulfide ions impurities in the reaction system was shown. It was found that the supported nickel catalyst has a much higher resistance to deactivation than the skeletal catalyst. The role of the support at the adsorption of sulfide from solution during deactivation of the investigated catalysts was demonstrated. It was suggested that the higher stability of the supported catalyst for deactivation is due to the sorption of the catalytic poison by silica gel. It is suggested the possibility of adjusting the selectivity of the catalyst deactivation character without changing the nature of the solvent. It was presented the possibility of purposeful variation in a wide range of adsorption properties of the active metal surface relative to the reactants, which makes possible to develop approaches to the synthesis of catalysts with given parameters of activity and selectivity relative to certain classes of organic compounds.Forcitation:Afineevskii A.V., Prozorov D.A., Osadchaya T.Yu., Sukhachev Ya.P., Lukin M.V. Nickel catalytic properties in reaction of liquid-phase hydrogenation of carbon-carbon double bond. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60.N 6. P. 95-101.

Nitrobenzene liquid-phase hydrogenation in a membrane reactor

1995 ◽  
Vol 25 (3-4) ◽  
pp. 409-415 ◽  
Author(s):  
J. Peureux ◽  
M. Torres ◽  
H. Mozzanega ◽  
A. Giroir-Fendler ◽  
J-A. Dalmon
Keyword(s):  
Liquid Phase ◽  
Membrane Reactor ◽  
Liquid Phase Hydrogenation

scholarly journals Liquid-Phase Hydrogenation of Maleic Acid over Pd/Al2O3 Catalysts Prepared via Deposition–Precipitation Method

Energies ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 284 ◽  
Author(s):  
Mi Byun ◽  
Ji Kim ◽  
Jae Baek ◽  
Dae-Won Park ◽  
Man Lee
Keyword(s):  
Reaction Time ◽  
Liquid Phase ◽  
Maleic Acid ◽  
Catalytic Performance ◽  
Raw Material ◽  
Precipitation Method ◽  
Pd Dispersion ◽  
Liquid Phase Hydrogenation ◽  
The Impact ◽  
Al2o3 Catalyst

Succinic acid (SA) is a valuable raw material obtained by hydrogenation of maleic acid (MA). The product selectivity of this reaction is highly dependent on the reaction conditions. This study therefore investigated the effect of the reaction temperature, hydrogen pressure, and reaction time on the liquid-phase hydrogenation of MA by a Pd/Al2O3 catalyst. Complete conversion of MA and 100% selectivity for SA were achieved at a temperature of 90 °C, H2 pressure of 5 bar, and reaction time of 90 min. Fumaric acid (FA) was formed as an intermediate material by hydrogenation of MA under nonoptimal conditions. The impact of the percentage of Pd dispersion and phase of the Al2O3 support (γ, θ + α, and α) was also examined. The Pd/Al2O3 catalyst with 29.8% dispersion of Pd and γ phase of Al2O3 exhibited the best catalytic performance. Thus, catalytic activity depends not only on the amount of Pd dispersion but also on the physicochemical properties of Al2O3.

Sign in / Sign up

Export Citation Format

Share Document