Packed Bed Reactor
Packed Bed Reactor - Related Videos
10:39
Single and Two-phase Flow in a Packed Bed Reactor
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA The goal of this experiment is to determine the magnitude of maldistribution in typical packed bed reactors in both single phase and two-phase (gas-liquid) flow and evaluate the effects of this maldistribution on pressure drop. The concepts of residence time distribution and dispersion are introduced through the use of tracers, and these concepts are related to physical...
11:00
Liquid Phase Reactor: Sucrose Inversion
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Both batch and continuous flow reactors are used in catalytic reactions. Packed beds, which use solid catalysts and a continuous flow, are the most common configuration. In the absence of an extensive recycle stream, such packed bed reactors are typically modeled as "plug flow". The other most common continuous reactor is a stirred tank, which is assumed to be perfectly...
08:56
Catalytic Reactor: Hydrogenation of Ethylene
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA The hydrogenation of ethylene (C2H4) to ethane (C2H6) has often been studied as a model reduction reaction in characterizing new metal catalysts.1-2 While supported nickel is not the most active metal catalyst for this reaction, it is active enough that reaction can take place at < 200°C. The reaction typically involves adsorbed, dissociated hydrogen (H2) reacting...
06:52
Lab-Scale Model to Evaluate Odor and Gas Concentrations Emitted by Deep Bedded Pack Manure
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Cited by 4 •
2018
A protocol has been developed to measure gases, odors, and nutrient composition in lab-scaled bedded manure packs, which can be used to study ways to improve air quality in commercial cattle facilities using deep-bedded manure packs.
05:56
Operation of High-pressure Reactor Vessels
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2023
Robert M Rioux, Pennsylvania State University, University Park, PA The use of gases in a synthetic chemistry laboratory is essential for carrying out a variety of highly facile and atom economical transformations. Reactions such as hydrogenation, oxidation, and amination require the use of gases like hydrogen, oxygen, and ammonia. Due to the poor solubility of these gases in typical reactant solutions, high pressures are necessary to achieve a meaningful reaction rate. Not only are these gases...
FAQs
Particle size influences both the contact conditions inside the bed and the pressure drop experienced by the flowing fluid. Changing particle dimensions can alter how reactants move across solid surfaces and how effectively heat and mass transfer occur. Engineers therefore evaluate particle size as a tradeoff involving conversion, selectivity, flow behavior, and efficient continuous operation.
These steps describe how reactants interact with catalytic particle surfaces during passage through the bed. Adsorption brings reactants onto the surface, the surface reaction transforms them, and desorption releases products back into the flowing phase. Their combined behavior helps determine conversion and selectivity, so surface interactions provide a mechanistic basis for evaluating reactor performance.
Flow rate, temperature, pressure, bed porosity, particle size, and pressure drop all influence reactor behavior. These variables affect how long reactants remain in contact with particle surfaces, how heat and mass move through the bed, and how reactions proceed. Adjusting them helps engineers seek suitable conversion and selectivity while maintaining practical continuous operation.
Design evaluation considers the selected solid particles, bed porosity, expected flow rate, operating temperature and pressure, and the resulting pressure drop. Engineers then assess how heat and mass transfer support reaction progress and how the conditions affect conversion and selectivity. This combined evaluation connects bed structure and operating conditions with efficient industrial performance.
This reactor type is suited to continuous gas-phase or liquid-phase processing when reactants must pass through a stationary solid bed. Supported applications include catalytic synthesis, pollutant removal, and petroleum refining. The appropriate operating conditions depend on the phase being processed and on the desired balance among conversion, selectivity, heat transfer, mass transfer, and pressure drop.
Conversion and selectivity provide key measures of how effectively the process transforms reactants and favors desired products. Engineers interpret these outcomes alongside heat and mass transfer behavior, flow rate, temperature, pressure, porosity, particle size, and pressure drop. Considering the variables together helps identify operating or design changes that may improve continuous industrial performance.