Different gases were allowed through the trapdoor at different temperatures, so it's possible to use that property to get even better selection of the carbon dioxide.
Caging Radioactive Gas
One of the more immediate applications might be getting the carbon dioxide out of natural gas deposits. Often, when drilling for natural gas, there is a lot of carbon dioxide present that has to be taken out before the natural gas can be compressed and liquefied. The chabazite could also improve the scrubbers used to take CO2 from emissions.
The work was published in the Journal of the American Chemical Society.
Photo: A naturally-occurring crystal of chabazite. Credit: Wikimedia Commons