Sorption Science Webinars/Workshops Directory
Webinar: Study of particle cohesion/adhesion and wettability of powders and formulations | Prof. Williams
1079 Views •Webinar: Understanding Isotherm Shape and Isotherm Modelling from DVS Experiments | Dr. Daniel J. Burnett
1024 Views •Webinar: The Effect of Surface Properties on Granulation Performance
913 Views •Particle Engineering in Pharmaceutical Solids Processing
847 Views •Webinar: The Importance of Moisture in Pharmaceuticals and Food Materials by Surface Energy
832 Views •Webinar: Particle Engineering in Pharmaceutical Solids Processing
695 Views •Webinar: Analysis of Food Products by Dynamic Vapour Sorption
612 Views •Webinar: Surface energy analysis for measuring physicochemical properties of materials
528 Views •Webinar: The Surface Properties and Water Adsorption Behaviour of Hair Fibers
473 Views •Seminario web: Métodos experimentales para la captura de CO2 en presencia de vapor de agua
434 Views •Webinar: Polymer characterization by Vapor Sorption Methods with Dr. Daniel Burnett
232 Views •Webinar: Water Sorption and Gas Adsorption Measurements on MOFs
206 Views •Webinar: Capture of Hydrogen Sulphide and Sulphur Dioxide in MOFs
186 Views •Webinar: Battery Electrode Active Materials Characterization
8 Views •Webinar: Moisture Sorption and Drying Kinetics by DVS Analysis
4 Views •Webinar: The effect of outgassing temperature on H2O & CO2 adsorption performance of MOFs & Zeolites
4 Views •Webinar: Aqueous and Gaseous Phase Characterization of Catalysts for the Carbon Dioxide Hydration Reaction
4 Views •Webinar: BET Surface Area Measurements by Sorption Methods at Ambient Conditions
4 Views •Workshop: Sorption Science Innovations in Cellulosic Material Characterization
3 Views •Online Workshop: Application of sorption science in food research
3 Views •Webinar: Experimental Methods for Measuring Vapor Pressures of Chemical Substances
Dr. Vladimir Martis, Surface Measurement Systems resident expert in Vapor Pressure, shares valuable insights and recent research findings for the Knudsen Effusion Method and Static Method for Vapor Pressure Measurement. Attendees also had a great opportunity to engage Dr. Martis directly in a live Q&A.
Vapor pressure is defined as the pressure exerted by vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. It is an important physicochemical property for many applications including human health, environmental protection, vapor phase deposition processes, lubricants operational life and separation processes. In addition, the vapor pressure thermodynamic data can be used to calculate enthalpies of vaporization or sublimation. Therefore, the accurate determination of vapor pressure is fundamental for the development of models simulating the behaviour of chemicals in industrial processes or outdoor environments. There are several methods for measuring vapor pressures, as it is difficult for a single experimental method to cover entire range of vapor pressures from less than 10-15 to 105 Pa.
In this webinar, we discussed the Knudsen effusion method and static method for vapor pressure measurement. The Knudsen effusion method is used for measuring sublimation or evaporation processes below 100 Pa in the temperature range from 293 to 673K. The static method has been developed to extend the measured pressure range up to 105 Pa in the temperature range between 293 and 323K. Also, it is capable of measuring vapor pressures of liquid samples, or crystalline solids.
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