h a l f b a k e r yAmbivalent? Are you sure?
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multiatomosphere gas-pak keep things fresh
A package of food, which would previously been filled with nitrogen to reduce oxidation, now has a bag full of 5 atmosphere argon gas. After the initial opening, the 5 atmosphere gas keeps seeping out, causing the container to have argon, rather than oxygen, keeping the material fresh even after opening. | |
A package of food, which would previously been filled with nitrogen to reduce oxidation, now has a little bag full of 5 atmosphere argon gas. After the initial opening, the 5 atmosphere gas keeps seeping out, causing the container to have argon, rather than oxygen, keeping the material fresh even after
opening.
It is possible this works a little better if the package has a 1.1 ATM pressure vent, so that the slightly pressurized mixed atmosphere is replaced with argon
[link]
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A package of food, which would previously been filled with nitrogen to reduce oxidation, now has a little bag full of 5 atmosphere argon gas. After the initial opening, the 5 atmosphere gas keeps seeping out, causing the container to have argon, rather than oxygen, keeping the material fresh even after opening. |
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"Krypton's concentration in the atmosphere is about 1 ppm. It can be extracted from liquid air by fractional distillation." |
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So for every ton of LOX, LN and Argon, you get 1g of krypton. |
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That makes it kind of expensive ... possibly to the point where the packaging costs substantially more than the food. |
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//for every ton of LOX, LN and Argon, you get 1 kg of krypton// |
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If it's at 1ppm, wouldn't that be 1 gram of krypton? |
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If you'd simply crack open a dewar of liquid N2 in your fridge, you'd bathe your perishables in an inert gas AND keep them cool at the same time. |
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// wouldn't that be 1 gram of krypton? // |
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We are glad that at least one person in the class is awake ... |
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An oxygen absorber is cheaper, more effective, and comes in a convenient tiny pouch format. |
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5 atmospheres of nitrogen is not going to "seep" out of an
opening in a container, especially any opening big enough
to extract something from the container. The gas is going
to rush out. And I don't see anything in this Idea to keep
the argon from rushing out, either, even before the
opening is closed for the first time, after the initial
opening. |
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[beanagel] comes in a convenient tiny pouch format ? |
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Well, well. Who knew, eh ? He certainly sucks all the oxygen out of a room ... |
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[vernon] The Guinness bubblator is sort of a gas reservoir at the base of a container of Guinness. It gradually releases carbon dioxide from the base to provide on-tap like amounts of froth from being a carbon dioxide reservoir - and you just reminded me of it! |
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...so I still think it could work. |
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