Gas sorption
We are equipped with an Autosorb-iQ-C by Quantachrome Anton Paar, connected to various gases including nitrogen, carbon dioxide and hydrogen. It is used for determining the surface area, the pore size distribution and the surface activity of solids, in both physisorption and chemisorption modes.
Physisorption mode
In physisorption mode, an adsorption isotherm is measured: it represents the number of molecules that are adsorbed on a solid with respect to the system's pressure. The type and range of porosity can be directly read from the shape of the adsorption isotherm.
Chemisorption mode
Chemisorption is mainly used to quantify the amount of surface-active sites, which are available to catalyse chemical reactions. With temperature-programmed methods in reduction, oxidation or desorption modes, the reduction readiness, etc. can be determined and activation energies can be calculated.
For pore size distributions and BET surface area work, we offer the Micromeritics 3 Flex (BET) instrumentation.
Visit our surface area and porosity library if you're interested in pore size distributions and BET surface area.