Acetophenone hydrogenation on Rh/Al 2 O 3 catalyst: Flow regime effect and trickle bed reactor modeling

Lee, Shinbeom; Zaborenko, Nikolay; Varma, Arvind

doi:10.1016/j.cej.2017.02.002

Cited by 10 publications

(8 citation statements)

References 33 publications

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“…Moreover, the resulted catalyst can be located in the shaped sphere catalysts which is suitable under harsh reaction conditions, such as being applied in the bed reactors, due to the mechanically solid γ-Al 2 O 3 pellet core. It is effective for the application in this work to choose the trickle bed reactor for the highly efficient production of sorbitol under environmentally friendly reaction conditions [39,43].…”

Section: Catalytic Mechanism Discussionmentioning

confidence: 99%

“…[39], the resulted shaped samples present its feasibility because the size of the resulted pellet or granules could decrease the pressure drop resulted from the hydrodynamics, which could guarantee the access to the continuous flow process [40]. Among all these shaped subjects, the sphere-like γ-Al 2 O 3 pellets have verified its superiority attributed to the high surface area [41], strong mechanical solidity [42], and a defined diameter [32], which is frequently used in trickle bed reactors [40,43].…”

Section: Introductionmentioning

confidence: 99%

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Efficient Sorbitol Producing Process through Glucose Hydrogenation Catalyzed by Ru Supported Amino Poly (Styrene-co-Maleic) Polymer (ASMA) Encapsulated on γ-Al2O3

et al. 2020

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In this work, a core-shell-like sphere ruthenium catalyst, named as 5%Ru/γ-Al2O3@ASMA, has been successfully synthesized through impregnating the ruthenium nanoparticles (NPs) on the surface of the amino poly (styrene-co-maleic) polymer (ASMA) encapsulating γ-Al2O3 pellet support. The interaction between the Ru cations and the electro-donating polymer shell rich in hydroxyl and amino groups through the coordination bond would guarantee that the Ru NPs can be highly dispersed and firmly embedded on the surface of the support. In addition, the solid sphere γ-Al2O3 pellet could serve as the core to support the resulted catalysts applied in the flow process in a trickle bed reactor to promote the productivity. The resulted catalyst 5%Ru/γ-Al2O3@ASMA can be applied efficiently in the glucose hydrogenation and presents a steadfast sorbitol yield of almost 90% both in batch reactor and the trickle bed reactor, indicating the potential feasibility of the core-shell-like catalyst in the efficient production of sorbitol.

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Section: Catalytic Mechanism Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient Sorbitol Producing Process through Glucose Hydrogenation Catalyzed by Ru Supported Amino Poly (Styrene-co-Maleic) Polymer (ASMA) Encapsulated on γ-Al2O3

et al. 2020

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“…As shown in Scheme , the hydrogenation of AP can result in several consecutive and competitive reactions. PE (1-phenylethanol), EB (ethylbenzene), CMK (cyclohexylmethylketone), EC (ethylcyclohexane), and CE are common hydrogenation products of AP in some reports. − In this research, they have been detected under specific catalytic conditions. It has been reported that noble metal-catalyzed hydrogenation reactions of AP follow all three pathways under different conditions, pathway 1 (generating CE through PE), pathway 2 (generating CE through CMK), and pathway 3 (generating EB). − Studies on the formation of AC (1-acetyl-1-cyclohexene), CHE (1-(cyclohexen-1-yl)ethanol), and ECH (1-ethylcyclohexene) are scarce as these intermediates are not very stable under the reported reaction conditions.…”

Section: Resultsmentioning

confidence: 67%

Microwave-Assisted Synthesis of Zirconium Phosphate Nanoplatelet-Supported Ru-Anadem Nanostructures and Their Catalytic Study for the Hydrogenation of Acetophenone

Ding

Thompson

et al. 2020

ACS Appl. Mater. Interfaces

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The catalytic hydrogenation of organic compounds containing carbonyl groups has been extensively studied and widely used in industrial processes. Herein, we report the preparation of a novel nanomaterial, α-zirconium phosphate (α-ZrP) nanoplatelet-supported ruthenium nano-anadem catalyst, which possesses high selectivity in the catalytic hydrogenation of aromatic ketones. The α-ZrP nanoplatelets were prepared using a modified reflux method. Through an ion-exchange and reduction reaction pathway, ruthenium nanoparticles were loaded on ZrP to produce Ru-ZrP with a nano-anadem structure. The successful synthesis of Ru-ZrP composites is supported by a series of characterization techniques (PXRD, SEM, TEM, EDS, XPS, FT-IR, etc.). Compared with pure ZrP nanoplatelets, the catalytic hydrogenation of acetophenone has been dramatically improved when using Ru-ZrP. Full conversion was achieved at room temperature, and the yield of 1-cyclohexylehtanol was up to 95%. The effects of reaction time, reaction temperature, and hydrogen pressure were investigated. The investigation illustrates that there are two proposed reaction pathways in the hydrogenation of acetophenone, which are further supported by computational analyses. Recycling experiments indicate that the Ru-ZrP material could be reused four times without a noticeable activity decrease.

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“…While in Reactor B, α PhOH firstly increases as molar ratio increases from 6 to 58, before almost keeping the same as O 2 :PhOH further increases from 58 to 232. [35] In Reactor B ( Figure 3B), the SD of pressure drop keeps increase as u L, sup increases from 0.49-0.81 mm/s and keeps at high value since u L, sup further increases to approximately 3.24 mm/s, reflecting behavior of highinteraction regime. Especially, when O 2 :PhOH is 232, it takes only approximately 22 seconds for α PhOH to 92%, which is significantly lower than the value of dozens of minutes in literatures.…”

Section: Comparison Of Reaction Performance Between Reactors With Imentioning

confidence: 90%

“…It is worth noting that α PhOH reaches 90% when gas-liquid microdispersion module is applied, with molar ratio of higher than 29. [35] The comparison results show that when gas-liquid microdispersion module is applied, transition from low-interaction regime to high-interaction regime, observed from pressure drop data, could appear at lower u L, sup , when the latter regime show better reaction performance. [10] Calculated r PhOH is shown in Figure 2B, which indicates r PhOH slightly increases as O 2 : PhOH increases in both Reactor A and B. r PhOH in Reactor B is 17%-70% higher than values in Reactor A under the same operating conditions, demonstrating the enhancement in reaction performance by coupling gas-liquid microdispersion module with TBRs.…”

Section: Comparison Of Reaction Performance Between Reactors With Imentioning

confidence: 96%

Process intensification in catalytic wet air oxidation of phenol via coupling gas‐liquid microdispersion with trickle bed reactors

Tan

Nie

et al. 2019

J Adv Manuf & Process

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Intensified trickle bed reactors were developed for catalytic wet air oxidation (CWAO) of phenol, by generating microbubbles before gas/liquid fluid flows along catalyst packed-beds. By coupling gas-liquid microdispersion module, phenol disappearance rate significantly increases under the same operating conditions and phenol conversion reaches 92% in 22 seconds at 160 C and 1000 kPa. Effects of operating conditions were studied systematically and results demonstrated characteristics of high-interaction regime at low Reynolds number. Comparison of effects among mass transfer and reaction steps shows CWAO reaction is controlled by resistance to liquid-solid mass transfer of phenol in most cases, while gas-liquid mass-transfer-resistance is ignorable. A dimensionless correlation, Sh = 2.29φ −0.91 (Re L + Re G ) 0.04 , was established, by considering influences of liquid film thickness and fluid flow situations on liquid-solid mass transfer coefficient in microbubblein-liquid/catalyst-particle system. The study would provide an effective method for intensifying CWAO and other liquid-solid-mass-transfer-resistance-controlled gas/ liquid/solid catalytic reactions and help understand mass transfer mechanism in new gas/liquid/solid system. K E Y W O R D Sintensified process fundamentals, modeling and simulation, process intensification

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Acetophenone hydrogenation on Rh/Al 2 O 3 catalyst: Flow regime effect and trickle bed reactor modeling

Cited by 10 publications

References 33 publications

Efficient Sorbitol Producing Process through Glucose Hydrogenation Catalyzed by Ru Supported Amino Poly (Styrene-co-Maleic) Polymer (ASMA) Encapsulated on γ-Al2O3

Efficient Sorbitol Producing Process through Glucose Hydrogenation Catalyzed by Ru Supported Amino Poly (Styrene-co-Maleic) Polymer (ASMA) Encapsulated on γ-Al2O3

Microwave-Assisted Synthesis of Zirconium Phosphate Nanoplatelet-Supported Ru-Anadem Nanostructures and Their Catalytic Study for the Hydrogenation of Acetophenone

Process intensification in catalytic wet air oxidation of phenol via coupling gas‐liquid microdispersion with trickle bed reactors

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