The Quantachrome CryoCooler enables accurate temperature control of gas sorption measurements (down to 20K) without the need of cryogens, allowing for longer lasting experiments which are not dependent on the lifetime of the Dewar.
Surface area and pore size measurements on porous materials are typically carried out using volumetric gas sorption. The sorption profile of the sample is dependent on temperature, the material’s properties and the gas used, and therefore the analysis may be performed at a range of temperatures to see how it varies. The technique is often performed at cryogenic temperatures and therefore, previously, required the use of cryogens such as liquid nitrogen and liquid argon.
However, cryogenic storage dewars can be bulky and take up a lot of space when a flask is required for each temperature that the researcher wants to work at. They can also be expensive and require special procurement and handling. To address these issues Quantachrome Instruments has released an optional accessory for the Autosorb-iQ line of instruments called the CryoCooler.
The basic workings of the CryoCooler are similar to those of a regular cryostat allowing researchers to work over a wide range of temperatures. However, the CryoCooler removes the need for cryogens for working at low temperatures by using gas compression and expansion to provide the cooling. This has the added benefit of longer experiment running times because, with the elimination of the cryogen, time limits imposed by the dewar are removed.
CryoCooler features and characteristics include:
For more information contact us.