Help CO2 poisoning with compressed cylinder?

[bunnii]

Recently, my family bought a soda stream machine. To go with it, obviously, they also bought small cylinders of CO2 to carbonate the water with. I was wondering if there was any possibility of them having enough CO2 in them to kill me- I've heard of some sort of manual respirator set up for this method, but I can't find lots of info or diagrams about it. I was hoping to go in a closed space (like a tent) and just pop them open but I have doubts about there being enough in the can do actually fill the tent. Any info (even telling me this won't work) is much appreciated!

 

[kernel_panic]

There have been some suicide cases involving dry ice (1 kg of it sublimates to around 541 l of CO2​ gas).

[Suicide case of carbon dioxide poisoning using dry ice] - PubMed

We had a suicide case suspected to result in death from carbon dioxide poisoning by dry ice in the car. A clay cooking stove with charcoal was in the car, but the charcoal had no burning sign. CO hemoglobin saturation degree of the suicide victim's blood was 0%. Moreover, there were signs that...

pubmed.ncbi.nlm.nih.gov

Suicide by carbon dioxide - PubMed

Suicides by self-poisoning are common in all parts of the world. Among these intoxications, gases are rarely used, especially carbon dioxide (CO2). Very few cases of self-inflicted and deliberate carbon dioxide poisonings have been reported. This paper presents two uncommon suicides by carbon...

pubmed.ncbi.nlm.nih.gov

A carbon dioxide fatality from dry ice - PubMed

This report documents a rare case of carbon dioxide intoxication in a young healthy male. The deceased hid in a small plastic container, size 1.5 x 1 x 1 m, and within 5 min he was located suffering convulsions and was reported as dead within minutes. Scene investigation revealed dry ice in the...

pubmed.ncbi.nlm.nih.gov

According to this article, loss of consciousness when breathing in a high concentration of CO2​ occurs very rapidly.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5380556

Your method could work if you can achieve a high enough concentration of CO2​ in the air and maintain it until death. I doubt your cylinders would be enough for that though.

 

[GasMonkey]

Unreliable.
CO₂ triggers the Hypercapnic Alarm Response which causes unbearable torture and panic.

The way to go is Nitrogen with SCBA/EEBD/ExitBag.