whats the difference between carbon dioxide and liquefied butane gas cylinders?

For my applied science assignment I've been told - ''Carbon dioxide does not liquefy when put under pressure. Butane gas (used in camping gas cylinders) does liquefy. Explain how the cylinders used to store carbon dioxide would be different from those used to store butane (camping gas).''

I have written about the butane gas cylinder having a thicker wall making it stronger, but i was wondering if anyone had any other ideas...

(applied science, physics, chemistry)

I sort of disagree with you... you can put butane in quite thin walled single use cylinders as used for lighter refills and the cheaper types of camping stove often seen in supermarkets. They're basically aerosol cans that you could probably crush in your hands once they're empty.


http://www.go-system.co.uk/277g-butane-cartridge

But it's also put into quite thick walled cylinders for refillable larger sizes that are liable to get knocked around have a tough time of it.

The limit on the amount of butane you can put in a cylinder is that you can't put any more butane in when it's full of liquid - and it does that at a pretty low pressure for home and camping type temperatures - in fact Butane is pretty useless camping fuel at 5 degrees C or less, it's very reluctant to come out of the cylinder under its own pressure.

see the graph on this page https://www.clesse.co.uk/gas-types-vaporisation-cylinder-offtake-rates-and-conversion-tables/

CO₂ cylinders are (afaik) always made with thick walls which allows for a greater pressure and a greater mass of Carbon Dioxide to be contained

The bigger type of butane cylinder has a meltable plug (the red thing visible through the circular hole in the handle) which melts and vents the contents in a controlled way in the event of it being overheated (e.g. in a fire)