Kinetics of yeast alcohol dehydrogenase and its coenzyme coimmobilized in a tubular flow reactor

1982 ◽  
Vol 24 (9) ◽  
pp. 2087-2097 ◽  
Author(s):  
M. A. Mazid ◽  
K. J. Laidler
Keyword(s):  
Alcohol Dehydrogenase ◽  
Flow Reactor ◽  
Yeast Alcohol Dehydrogenase ◽  
Tubular Flow Reactor ◽  
Tubular Flow ◽  
Kinetics Of

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

2016 ◽  
Vol 41 (4) ◽  
pp. 418-427 ◽  
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.

scholarly journals Turbulent Mixing in a Tubular Flow Reactor

1970 ◽  
Vol 34 (12) ◽  
pp. 1315-1323,a1 ◽  
Author(s):  
Yoshio Miyairi ◽  
Mitsuo Kamiwano ◽  
Kazuo Yamamoto
Keyword(s):  
Turbulent Mixing ◽  
Flow Reactor ◽  
Tubular Flow Reactor ◽  
Tubular Flow

Micromixing in a tubular flow reactor under simulated microgravity

AIChE Journal ◽  
1993 ◽  
Vol 39 (9) ◽  
pp. 1569-1573 ◽  
Author(s):  
K. S. Wenger ◽  
E. H. Dunlop ◽  
T. Kedar ◽  
B. G. Thompson
Keyword(s):  
Simulated Microgravity ◽  
Flow Reactor ◽  
Tubular Flow Reactor ◽  
Tubular Flow

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

2004 ◽  
Vol 49 (4) ◽  
pp. 13-18 ◽  
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.

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

1987 ◽  
Vol 26 (10) ◽  
pp. 1999-2007 ◽  
Author(s):  
Toivo T. Kodas ◽  
Sheldon K. Friedlander ◽  
Sotiris E. Pratsinis
Keyword(s):  
Fine Particle ◽  
Particle Production ◽  
Flow Reactor ◽  
Tubular Flow Reactor ◽  
Tubular Flow

scholarly journals A study of the oxidation of butan-1-ol and propan-2-ol by nicotinamide-adenine dinucleotide catalysed by yeast alcohol dehydrogenase.

1975 ◽  
Vol 147 (3) ◽  
pp. 541-547 ◽  
Author(s):  
C J Dickenson ◽  
F M Dickinson
Keyword(s):  
Alcohol Dehydrogenase ◽  
Ternary Complexes ◽  
Kinetics Of Oxidation ◽  
Yeast Alcohol Dehydrogenase ◽  
Rate Limiting Step ◽  
Limiting Step ◽  
Ph Range ◽  
Rate Limiting ◽  
Kinetics Of ◽  
Flow Experiments

1. The kinetics of oxidation of butan-1-ol and propan-2-ol by NAD+, catalysed by yeast alcohol dehydrogenase, were studied at 25 degrees C from pH 5.5 to 10, and at pH 7.05 from 14 degrees to 44 degrees C, 2. Under all conditions studied the results are consistent with a mechanism whereby some dissociation of coenzyme from the active enzyme-NAD+-alcohol ternary complexes occurs, and the mechanism is therefore not strictly compulsory order. 3. A primary 2H isotopic effect on the maximum rates of oxidation of [1-2H2]butan-1-ol and [2H7]propan-2-ol was found at 25 degrees C over the pH range 5.5-10. Further, in stopped-flow experiments at pH 7.05 and 25 degrees C, there was no transient formation of NADH in the oxidation of butan-1-ol and propan-2-ol. The principal rate-limiting step in the oxidation of dependence on pH of the maximum rates of oxidation of butan-1-ol and propan-2-ol is consisten with the possibility that histidine and cysteine residues may affect or control catalysis.

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

2015 ◽  
Vol 69 ◽  
pp. 564-569 ◽  
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

scholarly journals Prothrombin Activation by Prothrombinase in a Tubular Flow Reactor

1995 ◽  
Vol 270 (3) ◽  
pp. 1029-1034 ◽  
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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