Optimized Immobilization Strategy for Dirhodium(II) Carboxylate Catalysts for C−H Functionalization and Their Implementation in a Packed Bed Flow Reactor

2020 ◽  
Vol 132 (44) ◽  
pp. 19693-19699
Author(s):  
Taylor A. Hatridge ◽  
Wenbin Liu ◽  
Chun‐Jae Yoo ◽  
Huw M. L. Davies ◽  
Christopher W. Jones
Keyword(s):  
Flow Reactor ◽  
Packed Bed

Comparison of Raschig Ring Packing Pattern via Mean Resident Time using CFD Particle Tracing Technique: Dry Methane Reforming for Case Study

2018 ◽  
Author(s):  
Nattaporn Chutichairattanaphum ◽  
Phavanee Narataruksa ◽  
Karn Pana-Suppamassadu ◽  
Sabaithip Tungkamani ◽  
Chaiwat Prapainainar ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Flow Behavior ◽  
Plug Flow ◽  
Tubular Reactor ◽  
Packed Bed ◽  
Methane Reforming ◽  
Particle Tracing ◽  
Raschig Ring ◽  
Resident Time

This paper aims to study the effect of raschig ring packing patterns using Computational Fluid Dynamics (CFD). CFD module of particle tracing was established to measure particles diffusing through the packed bed. The support raschigs catalyst was modeled in three patterns within a tubular reactor – namely, vertical staggered, chessboard staggered and reciprocal staggered pattern. A case study of Dry Methane Reforming (DMR) was investigated at 600°C, 1 atm. The study of Mean Resident Time (MRT) and E(t) function were investigated to identify the packing pattern performance. The results showed that the minimum value of the E(t), which means the flow behavior, was close to ideal plug flow behavior. MRT can be used to systematically identify the deviation from the ideal plug flow reactor of the three different packing patterns.

Effective thermal conductivity in a packed-bed radial-flow reactor

AIChE Journal ◽  
1987 ◽  
Vol 33 (10) ◽  
pp. 1747-1750 ◽  
Author(s):  
A. L. López de Ramos ◽  
F. F. Pironti
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Radial Flow ◽  
Flow Reactor ◽  
Packed Bed ◽  
Radial Flow Reactor

scholarly journals Catalysis-in-a-Box: Robotic Screening of Catalytic Materials in the Time of COVID-19

2020 ◽  
Author(s):  
Gaurav Kumar ◽  
Hannah Bossert ◽  
Daniel McDonald ◽  
Anargyros Chatzidmitriou ◽  
M. Alexander Ardagh ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Low Cost ◽  
Packed Bed ◽  
Reaction Rates ◽  
Laboratory Scale ◽  
Materials Testing ◽  
Kinetic Measurements ◽  
Flow Reactors ◽  
Activation Barriers ◽  
Micro Flow

<p></p><p>The emergence of a viral pandemic has motivated the transition away from traditional, labor-intensive materials testing techniques to new automated approaches without compromising on data quality and at costs viable for academic laboratories. Reported here is the design and implementation of an autonomous micro-flow reactor for catalyst evaluation condensing conventional laboratory-scale analogues within a single gas chromatograph (GC), enabling the control of relevant parameters including reactor temperature and reactant partial pressures directly from the GC. Inquiries into the hydrodynamic behavior, temperature control, and heat/mass transfer were sought to evaluate the efficacy of the micro-flow reactor for kinetic measurements. As a catalyst material screening example, a combination of four Brønsted acid catalyzed probe reactions, namely the dehydration of ethanol, 2-propanol, 1-butanol, and the dehydra-decyclization of 2-methyltetrahydrofuran on a solid acid HZSM-5 (Si/Al 140), were carried out in the temperature range 403-543 K for the measurement of apparent reaction kinetics. Product selectivities, proton-normalized reaction rates, and apparent activation barriers were in agreement with measurements performed on conventional packed bed flow reactors. Furthermore, the developed micro-flow reactor was demonstrated to be about ten-fold cheaper to fabricate than commercial automated laboratory-scale reactor setups and is intended to be used for kinetic investigations in vapor-phase catalytic chemistries, with the key benefits including automation, low cost, and limited experimental equipment instrumentation.</p><p></p>

Optimized Immobilization Strategy for Dirhodium(II) Carboxylate Catalysts for C−H Functionalization and Their Implementation in a Packed Bed Flow Reactor

2020 ◽  
Vol 59 (44) ◽  
pp. 19525-19531
Author(s):  
Taylor A. Hatridge ◽  
Wenbin Liu ◽  
Chun‐Jae Yoo ◽  
Huw M. L. Davies ◽  
Christopher W. Jones
Keyword(s):  
Flow Reactor ◽  
Packed Bed

scholarly journals From batch to continuous: Au-catalysed oxidation of d-galacturonic acid in a packed bed plug flow reactor under alkaline conditions

2018 ◽  
Vol 3 (4) ◽  
pp. 540-549 ◽  
Author(s):  
F. van der Klis ◽  
L. Gootjes ◽  
J. van Haveren ◽  
D. S. van Es ◽  
J. H. Bitter
Keyword(s):  
Galacturonic Acid ◽  
Flow Reactor ◽  
Plug Flow ◽  
Packed Bed ◽  
Plug Flow Reactor ◽  
Catalysed Oxidation ◽  
Alkaline Conditions

Comparing the Au-catalysed oxidation of sugar acids: highest selectivity obtained in batch, superior productivity in flow.

The continuous synthesis and application of graphene supported palladium nanoparticles: a highly effective catalyst for Suzuki-Miyaura cross-coupling reactions

2015 ◽  
Vol 4 (3) ◽  
Author(s):  
Kendra W. Brinkley ◽  
Michael Burkholder ◽  
Ali R. Siamaki ◽  
Katherine Belecki ◽  
B. Frank Gupton
Keyword(s):  
Palladium Nanoparticles ◽  
Flow Reactor ◽  
Cross Coupling ◽  
Packed Bed ◽  
Deposition Process ◽  
Catalyst System ◽  
Coupling Reactions ◽  
Heating Source ◽  
Cross Coupling Reactions ◽  
Supported Palladium

AbstractAn efficient, sustainable, and continuous method for the preparation of graphene supported palladium nanoparticles (Pd/G) has been developed using microwave irradiation as a heating source for the metal deposition process. The Pd/G produced from this method was effective in Suzuki-Miyaura cross-coupling reactions with a broad range of substrates. When incorporated into a packed bed flow reactor, this ligand free catalyst system continued to demonstrate high reaction conversions with limited catalyst leaching in the reaction mixture (347 ppb palladium).

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