scholarly journals An in situ spatially resolved analytical technique to simultaneously probe gas phase reactions and temperature within the packed bed of a plug flow reactor

The Analyst ◽  
2013 ◽  
Vol 138 (10) ◽  
pp. 2858 ◽  
Author(s):  
Jamal Touitou ◽  
Robbie Burch ◽  
Christopher Hardacre ◽  
Colin McManus ◽  
Kevin Morgan ◽  
...  
Keyword(s):  
Gas Phase ◽  
Flow Reactor ◽  
Plug Flow ◽  
Packed Bed ◽  
Plug Flow Reactor ◽  
Gas Phase Reactions ◽  
Analytical Technique ◽  
Spatially Resolved

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.

An in situ spatially resolved method to probe gas phase reactions through a fixed bed catalyst

2012 ◽  
Vol 2 (9) ◽  
pp. 1811 ◽  
Author(s):  
Jamal Touitou ◽  
Kevin Morgan ◽  
Robbie Burch ◽  
Christopher Hardacre ◽  
Alexandre Goguet
Keyword(s):  
Gas Phase ◽  
Fixed Bed ◽  
Gas Phase Reactions ◽  
Spatially Resolved

scholarly journals Catalyst Stability Assessment in a Lab-Scale Liquid-Solid (LS)² Plug-Flow Reactor

Catalysts ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 755 ◽  
Author(s):  
Anton De Vylder ◽  
Jeroen Lauwaert ◽  
Stijn Van Auwenis ◽  
Jeriffa De Clercq ◽  
Joris W. Thybaut
Keyword(s):  
Catalyst Deactivation ◽  
Flow Reactor ◽  
Catalyst Activity ◽  
Plug Flow ◽  
Experimental Tests ◽  
Packed Bed ◽  
Plug Flow Reactor ◽  
Catalyst Stability ◽  
Commercial Resin ◽  
Intrinsic Kinetics

A packed-bed plug-flow reactor, denoted as the lab-scale liquid-solid (LS)² reactor, has been developed for the assessment of heterogeneous catalyst deactivation in liquid-phase reactions. The possibility to measure intrinsic kinetics was first verified with the model transesterification of ethyl acetate with methanol, catalyzed by the stable commercial resin Lewatit K2629, for which a turnover frequency (TOF) of 6.2 ± 0.4 × 10−3 s−1 was obtained. The absence of temperature and concentration gradients was verified with correlations and experimental tests. The potential for assessing the deactivation of a catalyst was demonstrated by a second intrinsic kinetics evaluation where a methylaminopropyl (MAP)-functionalized mesoporous silica catalyst was used for the aldol reaction of acetone with 4-nitrobenzaldehyde in different solvents. The cooperative MAP catalyst deactivated as a function of time on stream when using hexane as solvent. Yet, the monofunctional MAP catalyst exhibited stable activity for at least 4 h on stream, which resulted in a TOF of 1.2 ± 0.1 × 10−3 s−1. It did, however, deactivate with dry acetone or DMSO as solvent due to the formation of site-blocking species. This deactivation was mitigated by co-feeding 2 wt % of water to DMSO, resulting in stable catalyst activity.

Using a novel plug flow reactor for the in situ, simultaneous, monitoring of SAXS and WAXD during crystallisation from solution

2003 ◽  
Vol 5 (22) ◽  
pp. 4998 ◽  
Author(s):  
Harvey G. Alison ◽  
Roger J. Davey ◽  
John Garside ◽  
Michael J. Quayle ◽  
Gordon J. T. Tiddy ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Plug Flow ◽  
Plug Flow Reactor

An experimental study of gas phase back mixing under the counter-current gas-liquid flow on a vertical expanded metal sheet packing by static tracer technique

1980 ◽  
Vol 45 (1) ◽  
pp. 214-221
Author(s):  
Jan Červenka ◽  
Mirko Endršt ◽  
Václav Kolář
Keyword(s):  
Gas Phase ◽  
Flow Model ◽  
Plug Flow ◽  
Packed Bed ◽  
Metal Sheet ◽  
Concentration Profiles ◽  
Expanded Metal ◽  
Gas Liquid Flow ◽  
Counter Current ◽  
Back Mixing

Gas phase back mixing has been measured in a column packed with vertical expanded metal sheet under the counter-current flow of gas and liquid by the static method using a tracer. The observed experimental concentration profiles has not confirmed our earlier proposed model of back mixing, based on the concentration profiles in absorption runs. These profiles do not even conform with the axially dispersed plug flow model currently used to describe axial mixing in packed bed columns. The concentration profiles may be described by a combination of the axially dispersed plug flow model with back flow.

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