Sorption Science Webinars/Workshops Directory
Seminario web: Métodos experimentales para la captura de CO2 en presencia de vapor de agua
434 Views •Webinar: Study of particle cohesion/adhesion and wettability of powders and formulations | Prof. Williams
398 Views •Webinar: The Effect of Surface Properties on Granulation Performance
313 Views •Webinar: The Importance of Moisture in Pharmaceuticals and Food Materials by Surface Energy
281 Views •Webinar: Polymer characterization by Vapor Sorption Methods with Dr. Daniel Burnett
232 Views •Webinar: Particle Engineering in Pharmaceutical Solids Processing
211 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: The Surface Properties and Water Adsorption Behaviour of Hair Fibers
90 Views •Webinar: Analysis of Food Products by Dynamic Vapour Sorption
26 Views •Particle Engineering in Pharmaceutical Solids Processing
8 Views •Webinar: Battery Electrode Active Materials Characterization
7 Views •Webinar: Understanding Isotherm Shape and Isotherm Modelling from DVS Experiments | Dr. Daniel J. Burnett
5 Views •Webinar: Moisture Sorption and Drying Kinetics by DVS Analysis
4 Views •Webinar: BET Surface Area Measurements by Sorption Methods at Ambient Conditions
4 Views •Webinar: The effect of outgassing temperature on H2O & CO2 adsorption performance of MOFs & Zeolites
4 Views •Webinar: Surface energy analysis for measuring physicochemical properties of materials
4 Views •Webinar: Aqueous and Gaseous Phase Characterization of Catalysts for the Carbon Dioxide Hydration Reaction
4 Views •Webinar: Experimental Methods for Measuring Vapor Pressures of Chemical Substances
3 Views •Webinar: Analysis of Wood and Building Materials using Dynamic Vapour Sorption
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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