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

The oxidation of methanthiol and thiirane in supercritical water was explored by using a tubular-flow reactor system using oxygen as oxidant. No sulfur containing species existed in the gaseous effluent. Sulfide, sulfite and sulfate were detected as the sulfur containing species in the liquid effluent for supercritical water oxidation (SCWO) of methannthiol, while it was determined as thiosulfate, sulfite and sulfate for SCWO of thiirane. When reaction temperature exceeded 873K, the sulfur contained in the methanthiol or thiirane all transformed into the liquid products. Oxidant stoichiometric ratio had little effect on the conversion rate of sulfur but could promoted sulfite converted into sulfate. Sulfide and thiosulfate were determined as the exclusive sulfur containing product arising directly from methanthiol and thiirane, respectively. The transformation pathways of sulfur contained in the methanthiol and thiirane were proposed as methanthiol-sulfide-sulfite-sulfate and thiirane-thiosulfate-sulfite-sulfate, respectively.

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Heat and mass transfer in heterogeneous catalysis. XXX. Effect of heat and mass transfer at the external surface of the catalyst particle on behaviour of an isothermal tubular flow reactor

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19712454 ◽

1971 ◽

Vol 36 (7) ◽

pp. 2454-2466

Author(s):

J. Horák ◽

F. Jiráček

Keyword(s):

Mass Transfer ◽

Heterogeneous Catalysis ◽

Heat And Mass Transfer ◽

Flow Reactor ◽

External Surface ◽

Catalyst Particle ◽

Tubular Flow Reactor ◽

Tubular Flow

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Heat and mass transfer in heterogeneous catalysis. XXXII. Experimental study of dynamic behaviour of the catalytic tubular flow reactor

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19730185 ◽

1973 ◽

Vol 38 (1) ◽

pp. 185-193 ◽

Cited By ~ 2

Author(s):

F. Jiráček ◽

J. Horák ◽

M. Hájková

Keyword(s):

Mass Transfer ◽

Experimental Study ◽

Heterogeneous Catalysis ◽

Heat And Mass Transfer ◽

Dynamic Behaviour ◽

Flow Reactor ◽

Tubular Flow Reactor ◽

Tubular Flow

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Turbulent Mixing in a Tubular Flow Reactor

Chemical engineering ◽

10.1252/kakoronbunshu1953.34.1315 ◽

1970 ◽

Vol 34 (12) ◽

pp. 1315-1323,a1 ◽

Cited By ~ 1

Author(s):

Yoshio Miyairi ◽

Mitsuo Kamiwano ◽

Kazuo Yamamoto

Keyword(s):

Turbulent Mixing ◽

Flow Reactor ◽

Tubular Flow Reactor ◽

Tubular Flow

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New Insights into the Kinetics of the Gas-Phase Oxidation of Hexafluoropropene

Progress in Reaction Kinetics and Mechanism ◽

10.3184/174751916x14764433065222 ◽

2016 ◽

Vol 41 (4) ◽

pp. 418-427 ◽

Cited By ~ 1

Author(s):

David Lokhat ◽

Maciej Starzak ◽

Deresh Ramjugernath

Keyword(s):

Gas Phase ◽

Oxidation Process ◽

Flow Reactor ◽

Packed Column ◽

Phase Reaction ◽

Analytical Technique ◽

Tubular Flow Reactor ◽

Gas Phase Oxidation ◽

Tubular Flow ◽

Kinetics Of

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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