Low Pressure Process
Low Pressure Process - Related Videos
01:27
Pressure and Volume in an Adiabatic Process
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2023
Free expansion of a gas is an adiabatic process. However, there are few differences between free expansion and adiabatic expansion. During free expansion, no work is done, and there is no change in internal energy. But, for an adiabatic expansion, work is done, and there is a change in internal energy. During an adiabatic process, the relation between the pressure and volume is obtained from the condition for the adiabatic process, that is, However, for a free expansion process, this...
07:06
Wicking Tests for Unidirectional Fabrics: Measurements of Capillary Parameters to Evaluate Capillary Pressure in Liquid Composite Molding Processes
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Cited by 3 •
2017
An experimental method to measure geometrical parameters and the apparent advancing contact angles describing capillary wicking in unidirectional synthetic and natural fabrics is proposed. These parameters are mandatory for the determination of the capillary pressures that must be taken into account for liquid composite molding (LCM) applications.
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
09:46
A Pressure Injection System for Investigating the Neuropharmacology of Information Processing in Awake Behaving Macaque Monkey Cortex
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Cited by 3 •
2016
Here, we show the pressure injection of neuropharmacological substances during single-cell recording in an awake, behaving macaque monkey. This procedure allows pharmacological manipulation in the direct vicinity of a cortical recording site.
08:14
Ammonia Synthesis at Low Pressure
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Cited by 17 •
2017
Ammonia can be synthesized at low pressure by using a conventional catalyst and an ammonia selective absorbent.
FAQs
Reducing pressure lowers the boiling point of a liquid, so solvent or other volatile components can be removed at a lower temperature than may be required under atmospheric conditions. This shift is useful when processing heat-sensitive biological materials because it can reduce thermal exposure. The selected pressure still must be controlled alongside temperature, flow, and residence time to obtain consistent removal.
Lower surrounding pressure allows dissolved gases to leave solution more readily. This behavior can matter during the preparation or concentration of biological materials, where gas release becomes part of conditioning the liquid for subsequent processing. Maintaining the intended pressure helps make gas removal more consistent and supports reproducible material-preparation outcomes.
Pressure, temperature, flow, and residence time jointly determine how the operation behaves. Pressure influences boiling and gas release, while temperature determines the thermal conditions experienced by the material. Flow and residence time establish how long material remains under those conditions. Controlling all four helps balance effective solvent removal or drying with preservation of heat-sensitive biological materials.
A low-pressure setup typically combines a pump to reduce pressure, a vacuum chamber to contain the operation, and a pressure-control system to maintain the selected condition. These components work with temperature and flow control rather than operating independently. Their coordinated use supports repeatable solvent removal, concentration, drying, and related material-preparation steps.
In bioengineering, the approach can support solvent removal, concentration, drying, and other material-preparation operations. It is especially relevant when biological materials are sensitive to heat, because reduced pressure can lower the temperature needed to remove volatile components. Application selection depends on the desired preparation outcome and on maintaining pressure, temperature, flow, and residence time within controlled conditions.
A practical setup begins by defining the desired pressure and temperature, then using pumps, a vacuum chamber, and pressure-control equipment to establish and maintain them. Researchers should also specify material flow and residence time as part of the operating plan and keep these conditions consistent during processing. This coordinated control improves reproducibility and helps preserve product properties during solvent removal, concentration, or drying.