Sodium Clorate decomposes into salt and oxygen at 600C, it is mixed with iron powder for heat to make the oxygen generators on planes. To supply oxygen, you would need 1.7kg per day. (plus a bit more to burn the iron) And it’s bulk price <$1 /kg. However, 600C would make it harder to jerry rig a generator, although maybe wrapping a saucepan in fiberglass...
Sodium Clorate decomposes into salt and oxygen at 600C, it is mixed with iron powder for heat to make the oxygen generators on planes. To supply oxygen, you would need 1.7kg per day. (plus a bit more to burn the iron) And it’s bulk price <$1 /kg. However, 600C would make it harder to jerry rig a generator, although maybe wrapping a saucepan in fiberglass...