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

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.

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.

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.

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