I think this might work to a degree... but keeping in mind that the tyvek material is meant to breath in one direction only - the only way gases will escape the jar is if the air pressure inside the jar increases as the chlorophyll breaks down. I;m not sure if it would or not... it should marginally, but I;m not sure if it would be enough to really make a difference.

But basically you need that air pressure increase to push the gas through the Tyvek, just because it 'can' pass through the Tyvek, doesn;t mean it 'will' If air pressure inside the jar is equal to the air pressure outside the jar and there is no way for fresh air to enter the container, then the gas will not be able to escape the jar. The outside air pressure will basically hold it in.