Physical and Chemical Properties of the Artcare ZeoliteQuestion:
Will the adsorption capacity of the zeolite in Artcare products become saturated or fill up with pollutant gases over time?Answer:
Physical and Chemical Properties of the Artcare Zeolite
It is possible to saturate or fill up the Artcare zeolite in the laboratory by exposing a small sample of the zeolite to very high concentrations of a specific gas for an extended period of time. However, the probability of these artificial laboratory conditions being duplicated in an exhibit or storage environment for artwork is extremely remote. Calculations based on experimental adsorption capacity values of the Artcare zeolite for various pollutant gases (e.g. sulfur dioxide and nitrogen dioxide) show that the Artcare zeolite has a long functional lifetime and will provide protection for hundreds of years at the highest concentrations of these gases currently observed in our environment.Question:
Will pollutant gases trapped inside the zeolite come off or out-gas at the temperature and relative humidity conditions used in museum exhibition and storage?Answer:
Current laboratory information suggests that the loss of an adsorbed gas from the Artcare zeolite at normal museum use temperatures would be unlikely. For example, it took temperatures between 200 and 300 degrees Centigrade in the laboratory to drive off adsorbed sulfur dioxide. This indicates a strongly adsorbed molecule.
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