Related Experiment Video
Updated: Mar 31, 2026
10:22
Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements
Published on: September 7, 2019
8.9K
A Triple-Port High-Pressure Volumetric Sorption Analyzer: Calibration, Measurements, and Uncertainty Analysis for
Gensheng Lin1,2, Panpan Liu3, Markus Richter1,2
1Applied Thermodynamics, Chemnitz University of Technology, 09107 Chemnitz, Germany.
ACS Omega
|March 30, 2026
Summary
Zeolite materials effectively separate R-32 refrigerant from blends, with Köstrolith 4ABFK showing high selectivity. This advancement aids in phasing down harmful refrigerants and developing sustainable separation technologies.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Refrigerant blends require efficient separation methods, especially as regulations phase down certain compounds.
- Porous materials offer potential for selective gas adsorption and separation.
Purpose of the Study:
- To develop and validate a high-pressure volumetric sorption analyzer for screening porous materials.
- To identify suitable porous materials for separating specific refrigerants from blends.
- To evaluate the adsorption capacity and selectivity of various materials for target refrigerants.
Main Methods:
- Setup and validation of a triple-port automatic high-pressure volumetric sorption analyzer (273.15–368.15 K, up to 10 MPa).
- Measurement of adsorption isotherms for six pure refrigerants (R-32, R-125, R-1234yf, R-134a, R-1234ze-(E), R-290) on porous materials.
- Screening of six metal-organic frameworks, five zeolites, and one activated carbon for refrigerant separation capabilities.
Main Results:
- The analyzer demonstrated high reliability through validation with known CO2 adsorption cases.
- Zeolite samples (Köstrolith 3AK, 3ABFK, 3ABFK-(HSD), 4AK, 4ABFK) showed higher adsorption for R-32 than other refrigerants.
- Köstrolith 4ABFK exhibited the highest selectivity for R-32, enabling its separation from R-410A and other refrigerant mixtures.
Conclusions:
- The developed sorption analyzer is a reliable tool for rapid screening of porous materials for gas separation.
- Zeolites, particularly Köstrolith 4ABFK, are promising materials for selective R-32 separation, supporting refrigerant management strategies.
- Further research can focus on optimizing zeolite properties for enhanced refrigerant separation and system improvements.
More Related Videos
Related Concept Videos
01:11Glassware Calibration
2.0K
Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
2.0K
01:29Nonideal Two-Component Liquid Solutions
94
Nonideal liquid solutions, also known as real solutions, do not strictly follow Raoult's law. Raoult's law is a rule of thumb in physical chemistry. However, not all mixtures adhere to this law due to varying molecular interactions. For example, in an acetone/chloroform solution, the individual vapor pressures of the components are lower than expected, resulting in a total vapor pressure below that predicted by Raoult's law, causing a negative deviation.On the other hand, in an ethanol/water...
94
01:16Measurement of Fluid Pressure
2.2K
Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
2.2K
03:28Vapor Pressure Lowering
32.5K
The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates:
32.5K
01:28Vapor Pressure of Fluid
2.1K
The vapor pressure of a fluid is a crucial concept in fluid mechanics, influencing phenomena such as boiling and cavitation. Vapor pressure refers to the pressure exerted by a vapor at a state of thermodynamic equilibrium with its corresponding liquid phase at a specific temperature. It represents the tendency of molecules to escape from the fluid surface into the vapor phase.
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
2.1K
01:01Distillation: Vapor–Liquid Equilibria
5.5K
Distillation is a separation technique that takes advantage of the boiling point properties of disparate elements in a mixture. To perform distillation, we begin by heating a miscible mixture of two liquids with a significant difference in boiling points (at least 20°C). As the solution heats up and reaches the bubble point of the more volatile component, some molecules of the more volatile component transition into the gas phase and travel upward into the condenser, which is a glass tube...
5.5K