Photodecomposition of phenol in a tubular-flow reactor

The gas-phase reaction of hexafluoropropene and molecular oxygen was investigated in a tubular flow reactor at 450 kPa and within a temperature range of 463–493 K using HFP/O2 mixtures containing 20–67% HFP on a molar basis. Capillary and packed column chromatography served as the main analytical technique. The reaction yielded HFPO, COF2, CF3COF, C2F4 and c-C3F6 as gas-phase products. High molecular weight oligomers were also formed. The oligomers were found to have a polyoxadifluoromethylene structure according to elemental and 19F NMR analysis. At 493 K HFP is proposed to undergo oxygen-mediated decomposition to difluorocarbene radicals, yielding greater quantities of difluorocarbene recombination products. Kinetic parameters for a revised model of the oxidation process were identified through least squares analysis of the experimental data.

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Micromixing in a tubular flow reactor under simulated microgravity

AIChE Journal ◽

10.1002/aic.690390916 ◽

1993 ◽

Vol 39 (9) ◽

pp. 1569-1573 ◽

Cited By ~ 2

Author(s):

K. S. Wenger ◽

E. H. Dunlop ◽

T. Kedar ◽

B. G. Thompson

Keyword(s):

Simulated Microgravity ◽

Flow Reactor ◽

Tubular Flow Reactor ◽

Tubular Flow

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Reactor scale-up in AOPs: from laboratory to commercial scale

Water Science & Technology ◽

10.2166/wst.2004.0207 ◽

2004 ◽

Vol 49 (4) ◽

pp. 13-18 ◽

Cited By ~ 7

Author(s):

C.S. Zalazar ◽

M.D. Labas ◽

C.A. Martín ◽

R.J. Brandi ◽

A.E. Cassano

Keyword(s):

Formic Acid ◽

Large Scale ◽

Flow Reactor ◽

Acid Output ◽

Water Solution ◽

Batch Reactor ◽

Scale Up ◽

Mass Balances ◽

Tubular Flow Reactor ◽

Tubular Flow

A procedure to scale-up photoreactors employed in AOPs using laboratory information has been developed. Operating with a model compound the proposed procedure was applied to the decomposition of formic acid in water solution using hydrogen peroxide and UV radiation. With laboratory experiments the parameters of the kinetic equation were obtained in a small batch reactor operated within a recycling apparatus. The whole system was modeled employing radiation and mass balances. These balances were used together with a non-linear parameter estimator to derive the model kinetic constants. Then, these results were used in the modeling of the large-scale reactor to predict exit conversions in an isothermal, continuous, tubular flow reactor that is 2 m long and has a volume of 12 l. Once more, radiation and mass balances were used to predict formic acid output concentrations. Experimental data in the large-scale apparatus are in good agreement with theoretical predictions.

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Effect of reactant mixing on fine particle production in a tubular flow reactor

Industrial & Engineering Chemistry Research ◽

10.1021/ie00070a011 ◽

1987 ◽

Vol 26 (10) ◽

pp. 1999-2007 ◽

Cited By ~ 9

Author(s):

Toivo T. Kodas ◽

Sheldon K. Friedlander ◽

Sotiris E. Pratsinis

Keyword(s):

Fine Particle ◽

Particle Production ◽

Flow Reactor ◽

Tubular Flow Reactor ◽

Tubular Flow

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In-situ Neutron Tomography on Mixing Behavior of Supercritical Water and Room Temperature Water in a Tubular Flow Reactor

Physics Procedia ◽

10.1016/j.phpro.2015.07.080 ◽

2015 ◽

Vol 69 ◽

pp. 564-569 ◽

Cited By ~ 8

Author(s):

Seiichi Takami ◽

Ken-ichi Sugioka ◽

Kyohei Ozawa ◽

Takao Tsukada ◽

Tadafumi Adschiri ◽

...

Keyword(s):

Supercritical Water ◽

Room Temperature ◽

Flow Reactor ◽

Neutron Tomography ◽

Mixing Behavior ◽

Tubular Flow Reactor ◽

Tubular Flow ◽

Temperature Water

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Prothrombin Activation by Prothrombinase in a Tubular Flow Reactor

Journal of Biological Chemistry ◽

10.1074/jbc.270.3.1029 ◽

1995 ◽

Vol 270 (3) ◽

pp. 1029-1034 ◽

Cited By ~ 21

Author(s):

Didier Billy ◽

Han Speijer ◽

George Willems ◽

H. Coenraad Hemker ◽

Theo Lindhout

Keyword(s):

Flow Reactor ◽

Tubular Flow Reactor ◽

Tubular Flow ◽

Prothrombin Activation

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Numerical Simulation of O3 and NO Reacting in a Tubular Flow Reactor

Chemical and Process Engineering ◽

10.2478/cpe-2013-0029 ◽

2013 ◽

Vol 34 (3) ◽

pp. 361-373 ◽

Cited By ~ 1

Author(s):

Norbert J. Modliński ◽

Włodzimierz K. Kordylewski ◽

Maciej P. Jakubiak

Keyword(s):

Reaction Mechanism ◽

Flow Reactor ◽

Catalytic Reduction ◽

Model Performance ◽

Flow Simulation ◽

No Oxidation ◽

Reacting Flow ◽

Reactor Outlet ◽

Tubular Flow Reactor ◽

Tubular Flow

Abstract A process capable of NOx control by ozone injection gained wide attention as a possible alternative to proven post combustion technologies such as selective catalytic (and non-catalytic) reduction. The purpose of the work was to develop a numerical model of NO oxidation with O3 that would be capable of providing guidelines for process optimisation during different design stages. A Computational Fluid Dynamics code was used to simulate turbulent reacting flow. In order to reduce computation expense a 11-step global NO - O3 reaction mechanism was implemented into the code. Model performance was verified by the experiment in a tubular flow reactor for two injection nozzle configurations and for two O3/NO ratios of molar fluxe. The objective of this work was to estimate the applicability of a simplified homogeneous reaction mechanism in reactive turbulent flow simulation. Quantitative conformity was not completely satisfying for all examined cases, but the final effect of NO oxidation was predicted correctly at the reactor outlet.

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