Publication

Devolatilization- and surface renewal study with a LIST co-rotating processor

Albert Renken
1999
Book Chapters

Abstract

In the devolatilization step of polymn. processes, extruders are widely used for surface renewal. The LIST co-rotating processor (CRP) studied in the present paper, shows high performance for devolatilization processes. A sepn. model is correlated with exptl. data in the diffusion limited regime (where no foaming occurs). The effective viscosity range is 1000-6000 Pas, taking into account the influence of the shear rate. The model is applied with success to other types of kneading machines. [on SciFinder (R)]

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https://infoscience.epfl.ch/entities/publication/2d97b0d5-9275-4e9a-9152-950220123a61

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Albert Renken
1999
Book Chapters

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/2d97b0d5-9275-4e9a-9152-950220123a61

About this result

Related concepts (24)

Gasification

Gasification is a process that converts biomass- or fossil fuel-based carbonaceous materials into gases, including as the largest fractions: nitrogen (N2), carbon monoxide (CO), hydrogen (H2), and carbon dioxide (). This is achieved by reacting the feedstock material at high temperatures (typically >700 °C), without combustion, via controlling the amount of oxygen and/or steam present in the reaction. The resulting gas mixture is called syngas (from synthesis gas) or producer gas and is itself a fuel due to the flammability of the H2 and CO of which the gas is largely composed.

Viscosity

The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity is defined scientifically as a force multiplied by a time divided by an area. Thus its SI units are newton-seconds per square metre, or pascal-seconds. Viscosity quantifies the internal frictional force between adjacent layers of fluid that are in relative motion.

Strain rate

In materials science, strain rate is the change in strain (deformation) of a material with respect to time. The strain rate at some point within the material measures the rate at which the distances of adjacent parcels of the material change with time in the neighborhood of that point. It comprises both the rate at which the material is expanding or shrinking (expansion rate), and also the rate at which it is being deformed by progressive shearing without changing its volume (shear rate).

Related publications (4)

Devolatilization- and surface renewal study with a LIST co-rotating processor

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