Building on the way you asked your question, you seem to be using liquid nitrogen as a standard cooling bath for your setup. For 0°C, the standard cooling bath would be a DI water/ice mixture.

Yes you can. you have to use a circulating cooling bath with glycol+ deionized water and you can maintain the temperature for a long period of time at 0 degrees

In addition to the previous answers, an effective way to improve the accuracy and reliability of adsorption experiments is to vary the adsorption gas used. The choice of gas can significantly affect the outcome of the experiment, and choosing a gas with a low condensation temperature can help ensure the formation of an adsorption monolayer. For instance, nitrogen gas has a very low condensation temperature, but using a gas with a condensation temperature near 0°C, such as CO2, can guarantee the formation of an adsorption monolayer, leading to more confidence in the obtained isotherm. So, it's worth considering using alternative gases in your adsorption experiments to achieve better results.

Here is an example on how to perform experiments at higher temperature:

Article Measurement and analysis of adsorption isotherms of CO2 on a...