Entropy based control and optimization of a three-phase catalytic slurry intensified continuous chemical reactor

2012 ◽

Vol 466-467 ◽

pp. 141-145

Author(s):

Shi Li ◽

Yan Hu ◽

Xi Ju Zong

Keyword(s):

Modeling And Simulation ◽

Dynamic Model ◽

Chemical Reactor ◽

Operating Point ◽

Continuous Reactor ◽

Transient Responses ◽

Dynamic Behaviors ◽

Three Phase ◽

Continuous Chemical

This work proposes a dynamic model of a three-phase catalytic slurry intensified continuous reactor. The model is simulated to describe the dynamic behaviors of the hydrogenation of o-cresol on Ni/SiO2 catalyst. The nominal operating point and the transient responses for different input perturbations are discussed.

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Control and optimization of a three-phase catalytic slurry intensified continuous chemical reactor

Journal of Process Control ◽

10.1016/j.jprocont.2010.03.002 ◽

2010 ◽

Vol 20 (5) ◽

pp. 664-675 ◽

Cited By ~ 19

Author(s):

S. Bahroun ◽

S. Li ◽

C. Jallut ◽

C. Valentin ◽

F. De Panthou

Keyword(s):

Chemical Reactor ◽

Three Phase ◽

Continuous Chemical

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Production of Nanostructures Under Ultraturbulent Collision Reaction Conditions - Application to Catalysts, Superconductors, CMP Abrasives, Ceramics, and Other Nanoparticles

MRS Proceedings ◽

10.1557/proc-775-p9.7 ◽

2003 ◽

Vol 775 ◽

Author(s):

Irwin J. Gruverman ◽

Jeffrey R. Thumm

Keyword(s):

Size Distribution ◽

Chemical Reactor ◽

Mixing Conditions ◽

Reaction Conditions ◽

Direct Precipitation ◽

Reaction Region ◽

The One ◽

Continuous Chemical ◽

Interaction Chamber ◽

Reactant Solution

AbstractThe development, operation and applications of a novel continuous chemical reactor system are described. The system, known as a Multiple Stream Mixer/Reactor (or MMR), produces nanoparticles by direct precipitation from two or more reactant solution streams in an extreme energy density, ultraturbulent, collision reaction region. Sensors and a control system are employed to assure constant mixing conditions and desired stoichiometry in the reaction region. The interaction chamber is designed to allow macro-, meso- and micromixing during processing. This allows control of product purity, yield, size, size distribution, and phase purity. Typical nanoparticle diameters in the one to ten nanometer range are often achievable, with tight size distribution. The MMR can be scaled from development quantities to tons/hour for production applications.

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Experimental and modelling aspects of the reactive extrusion process

Mechanics & Industry ◽

10.1051/meca/2019052 ◽

2019 ◽

Vol 20 (8) ◽

pp. 803 ◽

Cited By ~ 3

Author(s):

Philippe Cassagnau ◽

Véronique Bounor-Legaré ◽

Bruno Vergnes

Keyword(s):

Chemical Reactor ◽

Reactive Extrusion ◽

Extrusion Process ◽

Industrial Applications ◽

Twin Screw Extruders ◽

Single Screw Extruders ◽

Twin Screw ◽

On Line ◽

Screw Extruders ◽

Continuous Chemical

Reactive extrusion consists in using an extruder as a continuous chemical reactor. It is not a recent process, but it has been rapidly developed during the last thirty years and is more and more used today for the chemical modification of existing polymers. Among the various extrusion systems (single screw extruders, counter- and corotating twin-screw extruders, co-kneaders), the corotating twin-screw extruders are today the most widely used in reactive extrusion. After a presentation of the main advantages and drawbacks of the reactive extrusion, we will describe the way to control the process through on-line and in-line monitoring. Then, a modelling approach based on continuum mechanics will be presented, followed by an example of industrial applications of this particular process.

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Dynamic nonlinear feedback for temperature control of continuous stirred reactor with complex behavior

Journal of Applied Research and Technology ◽

10.22201/icat.16656423.2009.7.02.514 ◽

2009 ◽

Vol 7 (02) ◽

Cited By ~ 2

Author(s):

Pablo A. López Pérez ◽

Ricardo Aguilar-López

Keyword(s):

Sliding Mode ◽

Chemical Reactor ◽

High Order ◽

Complex Behavior ◽

Nonlinear Feedback ◽

Temperature Tracking ◽

Stirred Reactor ◽

Uncertainty Estimator ◽

Alternative Methodology ◽

Continuous Chemical

The main objective of this work is to present an alternative methodology for the design of a class of integral high order slidingmode controller applied to a class of continuous chemical reactor with complex behavior for temperature tracking purposes. The proposed design is based on the differential geometry framework, where the named reaching trajectory contains a high order sliding mode term in order to diminish chattering. Considering that the proposed technique is model based, an observerbased uncertainty estimator is coupled, which provides robustness against model uncertainties and noisy measurements.Numerical simulations are performed in order to show the capacities of the proposed controller, which is compared with other nonlinear methodologies.

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