Twin-screw Reactor
Twin-screw Reactor - Related Videos
07:30
Fast Pyrolysis of Biomass Residues in a Twin-screw Mixing Reactor
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Cited by 20 •
2016
A procedure for thermochemical conversion of biomass residues is presented that aims at maximizing the yield of liquid products (fast pyrolysis). It is based on a technology proven on an industrial scale and especially suitable for treating a straw type of biomass.
07:21
Twin-Screw Extrusion Process to Produce Renewable Fiberboards
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Cited by 14 •
2021
A versatile twin-screw extrusion process to provide an efficient thermo-mechano-chemical pretreatment on lignocellulosic biomass was developed, which leads to an increased average fiber aspect ratio. A natural binder can also be added continuously after fiber refining, leading to bio-based fiberboards with improved mechanical properties after hot pressing of the obtained extruded material.
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...
07:28
Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
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2015
A protocol for the high-throughput analysis of polymerization catalyst, chain transfer polymerizations, polyethylene characterization, and reaction kinetic analysis is presented.
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...
FAQs
Intermeshing screw geometry controls how material moves through the barrel and how intensely it is mixed. As the screws rotate, their configuration promotes distributive mixing, which spreads components throughout the material, while also generating dispersive shear that helps break up or redistribute material domains. Geometry therefore links transport, mixing, transformation, and residence-time control in a single continuous process.
These mechanisms address different mixing needs. Distributive mixing improves the spatial uniformity of components, whereas dispersive shear applies mechanical action that can break apart or redistribute material structures. Their combination matters when a formulation or biomaterial must become both compositionally consistent and sufficiently transformed. The screw design determines how these effects are delivered during continuous passage through the reactor.
Barrel temperature and residence time are linked control variables. Heating or cooling establishes the thermal environment, while residence time determines how long material remains exposed to transport, mixing, shear, and transformation. Together, they influence heat transfer, mass transfer, and the extent of processing. Controlling both is especially relevant for sensitive bioengineering materials that require consistent treatment without unnecessary exposure.
A typical operation coordinates screw rotation, barrel temperature control, material transport, mixing, transformation, and shaping when shaping is part of the process. The intermeshing screws provide continuous movement, while the heated or cooled barrel manages thermal conditions. This integrated arrangement can combine blending, reaction, and shaping rather than requiring each function to occur as a separate operation.
Continuous operation can improve process consistency, scalability, and control compared with batch processing. Material experiences ongoing transport and mixing under managed thermal conditions, and residence time can be controlled as part of the process. These features make the reactor attractive when researchers need repeatable treatment or want to integrate blending, reaction, and shaping while developing bioengineering materials or formulations.
In bioengineering, the platform supports processing of polymers, biomaterials, pharmaceutical formulations, and other sensitive materials. Its combined mixing, reaction, heat-transfer, and shaping capabilities are relevant to drug-delivery systems, tissue-engineering materials, and biomanufacturing workflows. The continuous format also supports research focused on scale-up and consistent production, where control over processing conditions can influence the resulting material or formulation.