Introduction

Sortpion of gases (e.g. CO2, CO, CH4,…) by solid/liquid sorbents is a problem of utmost scientific and technological relevance. Applications already implemented/in development, such as gas capture and/or their separation from complex mixtures, call for an accurate understanding of sorption phenomena. These strongly depends on the sorption temperature.

Technical features

The object of the patent consists of a cell, constitued by a glass burette inserted in a concentric jacket, to carry out volumetric measurements in temperature conditions close to environmental conditions (10-40 ° C). The cell exists in two configurations: opened and closed. The open configuration is meant for samples activation through heat treatments (up to 400 ° C), by inserting the end part of the burette in an electrical oven. The closed configuration allows ciruclating a thermostatic fluid in the interstice between the burette and the jacket, in order to ensure precise temperature control during the measurement in terms of homogeneity and stability over time, a feature of particular importance as measurements can take a long time (days) and are influenced by temperature fluctuations. The proposed cell, compatible with commercially available volumetric instruments, allows to carry out consecutive pretreatment and measurement procedures using a single configuration.

 

Possible Applications

• CO2 capture
• CH4 separation from natural gas
• Metal sites titration by CO
• Activation of molecules by catalysts

Advantages

• Compatible with the main commercial volumetric intruments
• Excellent thermal stability
• Measurment at near-ambient temperatures
• Possibility to activate samples in situ under mild conditions
• Possibility to measure liquids without vapor pressure under stirring