With the IsoSORP® instruments two samples can be weighed simultaneously. Additionally to recording the mass change of the sample material a second – inert – sample can be weighed. By weighing a Ti sinker as the second sample the density of the gas phase in the balance is determined according to Archimedes’ principle. Particularly at high pressures or in gas mixtures this cannot be calculated accurately using equations of state. The density influences the measured sample mass, via the buoyancy effect, and thus should be known accurately.
Furthermore, density measurement of binary mixtures enables their composition to be calculated without the necessity of further composition analysis (e.g. by gas chromatograph). Therefore, the IsoSORP® offers two devices in one: gravimetric measurement of mass transfer between a gaseous fluid phase and the sample and also the gravimetric measurement of gas composition.
A special version of the IsoSORP® was developed to investigate mass transfer processes in a forced flow of gas through bulk material beds. This apparatus is used to investigate for example supercritical fluid extraction or reactions on catalysts as close to the real process conditions as possible.
The bulk material container is placed on a sealed plate and the gas is forced to flow through the material. The measurement of sample weight change due to the mass transfer from or to the gas phase is carried out over user configured time intervals. The gas flow is stopped for a short time and the container is lifted to a freely suspended state by the Magnetic Suspension Balance and weighed. By this procedure distinct weight data can be gained, each after a certain time of gas flow through the sample.
These options are available for MSB type E1 and E10
Details about the instruments are provided on the subsequent pages. The IsoSORP Series of instruments is customizable to a wide extend.
Contact us to discuss your research needs.