Kinetics of Electrocoagulation of Hexane Extractable Materials in Artificial Bilge Water Treatment

2013 ◽  
Vol 29 (02) ◽  
pp. 57-65
Author(s):  
Guillermo J. Rincon ◽  
Enrique J. La Motta ◽  
Blake Mickler
Keyword(s):  
New Orleans ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Tank Reactor ◽  
First Order ◽  
First Order Kinetics ◽  
In Series ◽  
Continuous Stirred Tank ◽  
The University ◽  
Kinetics Of

Research on the electrocoagulation (EC) of hexane extractable materials (HEM) has been conducted at the University of New Orleans using a commercial bench-scale EC reactor. A series of EC experiments were performed using a synthetic emulsion with a HEM concentration of approximately 700 mg/L−1. It was confirmed that EC of HEM follows first-order kinetics, and kinetic constants of 0.0441 s−1 and 0.0443 s−1 were obtained from applying both the dispersion and tanks-in-series (TIS) models, respectively. In both cases, R2 was 0.97. Also, the TIS model indicated that each cell of the EC behaves as an independent continuous-stirred tank reactor.

Kinetics of the successive chlorination of 1,2-dichloroethane in the liquid phase

1969 ◽  
Vol 22 (6) ◽  
pp. 1177 ◽  
Author(s):  
DS Caines ◽  
RB Paton ◽  
DA Williams ◽  
PR Wilkinson
Keyword(s):  
Liquid Phase ◽  
Rate Constants ◽  
Relative Rate ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Alternative Pathways ◽  
Tank Reactor ◽  
Relative Rate Constants ◽  
Continuous Stirred Tank ◽  
Kinetics Of

Liquid 1,2-dichloroethane has been chlorinated by dissolved chlorine to a succession of chloroethanes up to the ultimate hexachloroethane. The results of both batch and continuous stirred tank reactor systems have been analysed by computer techniques to give a set of relative rate constants from which one can predict the product composition for a given chlorine uptake, the aim in this work being to optimize the production of tetrachloroethanes. An unusual feature of the kinetics is that 1,1,1,2- and 1,1,2,2-tetrachloroethanes provide alternative pathways between 1,1,2-trichloroethane and pentachloroethane.

Criteria for a unique steady state for enzymatic depectinization of bael (Aegle marmelos) juice in a continuous stirred tank reactor

2018 ◽  
Vol 3 (3) ◽  
pp. 333-343
Author(s):  
Sourav Sengupta ◽  
Amit Jain ◽  
Sirshendu De
Keyword(s):  
Steady State ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Aegle Marmelos ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank ◽  
Kinetics Of ◽  
Unique Steady State

The depectinization kinetics of bael (Aegle marmelos) juice using the enzyme pectinase was evaluated and it was observed to follow the Michaelis–Menten model.

Kinetics of attached microbial growth in a continuous stirred tank reactor

1978 ◽  
Vol 12 (4) ◽  
pp. 243-249 ◽  
Author(s):  
S OHGAKI ◽  
S HWANG ◽  
J MATSUMOTO
Keyword(s):  
Microbial Growth ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank ◽  
Kinetics Of

scholarly journals Simulation of continuous stirred tank reactor (CSTR) for polypropylene production

2020 ◽  
Vol 5 (2) ◽  
pp. 014-023
Author(s):  
Kekpugile Kenneth Dagde ◽  
Gunorubon Jackson Akpa ◽  
Obarijimah Osaroworlu ◽  
Olalekan Michael Adeloye
Keyword(s):  
Stirred Tank ◽  
Polymerization Process ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Natta Catalyst ◽  
In Series ◽  
Continuous Stirred Tank ◽  
Model Equations ◽  
Fourth Order Method

This research study predicted the conversion and yield pattern for the polymerization of propylene to polypropylene. The polymerization process was performed using propylene as the monomer and ethylene as the co-monomer in a four continuous stirred tank reactor (CSTR) connected in series with a Ziegler-Natta catalyst. Model equations were developed for polypropylene polymerisation by applying the principle of conservation of mass in tandem with the rate equation. The resulting model equation was solved numerically using the Runge-Kutta fourth order method and a MATLAB program was written to implement the numerical techniques. The deduced model results depicted the conversion of propylene from the first reactor to the fourth reactor (0.9900 to 0.0113) and increase in polypropylene production as the reaction proceeds from the first reactor to the fourth reactor (0.0000 to 0.9878) showing the conversion and yield pattern of the process. The simulated model results were compared with literature data with a percentage deviation for polypropylene and propylene of 2.2% and 3.8% respectively.

New kinetics and mechanisms of oxygen delignification observed in a continuous stirred tank reactor

Holzforschung ◽  
2009 ◽  
Vol 63 (3) ◽  
Author(s):  
Yun Ji ◽  
Emilia Vanska ◽  
Adriaan van Heiningen
Keyword(s):  
Aromatic Ring ◽  
Lignin Content ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Residual Lignin ◽  
Oxygen Delignification ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
First Order ◽  
Continuous Stirred Tank

Abstract Special oxygen delignification experiments were performed in a differentially operated continuous stirred tank reactor (CSTR). Because the dissolved oxygen and alkali concentrations in the reactor are constant, the rate of lignin removal may be determined from the dissolved lignin content in the outflow stream measured by UV absorption. The delignification kinetics were determined at different temperatures, oxygen pressures and caustic concentrations on softwood kraft pulps of different kappa numbers. The kinetics are first order in residual lignin content [hexenuronic acid (HexA) corrected], and follow a Langmuir-type behavior for adsorption of oxygen on the active aromatic lignin sites. The first order in residual lignin content implies that the active lignin sites are uniformly distributed and have the same reactivity. It is proposed that the active site is the 3 carbon of the aromatic ring, where oxygen reacts to form a hydroperoxide, with a pK a of almost 2 units higher than that of phenolic lignin. The kinetics of phenolic delignification can be described by assuming that the reaction between adsorbed oxygen and carbon 3 of the aromatic ring is the rate determining step. Alternatively, the decomposition of the hydroperoxide anion is rate determining. Peeling delignification has been proposed as an additional delignification route by peeling of hemicelluloses which have lignin fragments covalently bound to them. It is shown that the impact of peeling delignification is relatively small and limited to the initial delignification phase. Finally, data are presented showing that radicals may provide an essential contribution to delignification by their removal of non-lignin and non-HexA oxidizable structures contributing to the kappa number.

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