Method I'm trying to find out if this will work | Nitrogen

[gardenhouse]

Sorry if this is a repost, This isn't my initial method to CBT, of course if N was available, it would that, but i live in the country with the strictest border force in the western world, my chloroquine bought online from India was seized, I'm sure if I buy SN overseas, they will seize it as well since it's actually available locally but hard to get without proper license.

All kind of SH tools are strictly controlled, I hate this country. So, the only available source locally is NITROGEN, I would like to know if these would work....

I live with my partner, I have no idea where to hide this stuff, hope the gas cylinder is not big....






Thanks

 

[-L-]

That is too small.
A standard 10lb non-disposable cylinder for reference holds roughly 3,115 to 3,400 liters depending on the tank pressure and assuming 20c ambient room temperature. (did some rough math).

With a tiny 2.2L tank you are more likely to run out of gas prematurely and cause brain damage while staying alive.

I personally would only attempt this with a 20lb cylinder minimum, and a good flow regulator. You don't want to end up a vegetable. You need good continuous flow which the above won't give you.

I thought I'd edit to add another detail because it's kinda funny in a morbid way, ideally you want 15-20 LPM (liters per minute) of flow.. So your 2.2L tank would likely run out of gas before you even pull the bag down over your head.
Assuming you keep the gas running for 40 minutes at 20 LPM that is 800 liters of gas at minimum, and honestly that's cutting it too close, you want overhead to be sure your dead, and to be sure you don't have any CO2 buildup in the bag to trigger your hypercapnic alarm response.
That's all I'll say.

Kinda wrong fixed it here https://sanctioned-suicide.net/thre...f-this-will-work-nitrogen.241193/post-3453690

 

[DeathSweetDeath]

Yes, it's far too small. Nothing disposable is going to be sufficient.

If you can't hide the right size tank, simply say it's for making coffee or homemade ice cream or brewing beer… or anything that your partner might believe.

 

[AnonAnon1234]

Deffo need a bigger tank. If you drive you can say the Nitrogen is for putting into tyres though.

Which country are you in out of interest?

 

[gardenhouse]

That is too small.
A standard 10lb non-disposable cylinder for reference holds roughly 3,115 to 3,400 liters depending on the tank pressure and assuming 20c ambient room temperature. (did some rough math).

With a tiny 2.2L tank you are more likely to run out of gas prematurely and cause brain damage while staying alive.

I personally would only attempt this with a 20lb cylinder minimum, and a good flow regulator. You don't want to end up a vegetable. You need good continuous flow which the above won't give you.

I see, i read on PPH book, 2.2 l tank is suitable?

Deffo need a bigger tank. If you drive you can say the Nitrogen is for putting into tyres though.

Which country are you in out of interest?

New zealand mate

 

[-L-]

I see, i read on PPH book, 2.2 l tank is suitable?

NOOOO!!!

No it really isn't.. Read my edit...
You are wasting your money at best or killing some brain cells at worst.

I thought I'd edit to add another detail because it's kinda funny in a morbid way, ideally you want 15-20 LPM (liters per minute) of flow.. So your 2.2L tank would likely run out of gas before you even pull the bag down over your head.
Assuming you keep the gas running for 40 minutes at 20 LPM that is 800 liters of gas at minimum, and honestly that's cutting it too close, you want overhead to be sure your dead, and to be sure you don't have any CO2 buildup in the bag to trigger your hypercapnic alarm response.
That's all I'll say.

Kinda wrong fixed it here https://sanctioned-suicide.net/thre...f-this-will-work-nitrogen.241193/post-3453690
But would still say to get a bigger cylinder.

 

[DeathSweetDeath]

It's not enough for even one minute of flow.

 

[-L-]

It's not enough for even one minute of flow.

That 2.2L tank would last roughly 8 seconds at 15 LPM and really you should be aiming for 20 LPM.
Hope those 8 seconds are worth $95 NZD..... WRONG

It's not enough for even one minute of flow.

Actually I may be wrong. I think I am wrong.. Because this is New Zealand / metric.. In North America (US/CA) lbs are used to signify tank size, (the water volume) of the tank. So if we assume 2.2L is tank size / water holding capacity and not gas volume, it actually is a lot more reasonable...

If the N2 where at atmospheric pressure it would be 2.2L worth of N2.. But because it is compressed more fits in the tank. I checked and disposable N2 cylinders like this are typically rated around 100-110 bars for internal pressure. So roughly 1450-1595 psi.

So assuming conservatively it is at 100 bars, So at 100 bar of tank pressure, The total gas volume is 2.2L x 100 = 220L of total gas.

So this would give a run time of 14.6 minutes roughly at a constant flow rate of 15 LPM.

Still not enough gas but you wouldn't run out in 8 seconds either.

Disregard my previous comments I am a a sleep deprived idiot used to working with imperial tank sizing for inert gasses.

So it's 220L of gas, But with all that said, I would still get a bigger tank.. The vegetable risk with a single one of these tanks is too high IMHO, and Nitschke is often quite liberal in his estimates I find.. Assume 800L of gas total (at 100 bar not tank water volume) is needed at minimum.

So I hope that clears up any confusion. @gardenhouse

I feel stupid now, but I'll correct it on record and own it.

 

[gardenhouse]

That 2.2L tank would last roughly 8 seconds at 15 LPM and really you should be aiming for 20 LPM.
Hope those 8 seconds are worth $95 NZD..... WRONG

Actually I may be wrong. I think I am wrong.. Because this is New Zealand / metric.. In North America (US/CA) lbs are used to signify tank size, (the water volume) of the tank. So if we assume 2.2L is tank size / water holding capacity and not gas volume, it actually is a lot more reasonable...

If the N2 where at atmospheric pressure it would be 2.2L worth of N2.. But because it is compressed more fits in the tank. I checked and disposable N2 cylinders like this are typically rated around 100-110 bars for internal pressure. So roughly 1450-1595 psi.

So assuming conservatively it is at 100 bars, So at 100 bar of tank pressure, The total gas volume is 2.2L x 100 = 220L of total gas.

So this would give a run time of 14.6 minutes roughly at a constant flow rate of 15 LPM.

Still not enough gas but you wouldn't run out in 8 seconds either.

Disregard my previous comments I am a a sleep deprived idiot used to working with imperial tank sizing for inert gasses.

So it's 220L of gas, But with all that said, I would still get a bigger tank.. The vegetable risk with a single one of these tanks is too high IMHO, and Nitschke is often quite liberal in his estimates I find.. Assume 800L of gas total (at 100 bar not tank water volume) is needed at minimum.

So I hope that clears up any confusion. @gardenhouse

I feel stupid now, but I'll correct it on record and own it.

No need to feel bad, I know the conversion can be confusing sometimes , and i'm still learning too. Is 3.5 litre enough then? Or maybe i can use 2x cylinders of 2.2 litre, it's just nz is such a small country, it's hard to source anything. Thanks

 

[-L-]

No need to feel bad, I know the conversion can be confusing sometimes , and i'm still learning too. Is 3.5 litre enough then? Or maybe i can use 2x cylinders of 2.2 litre, it's just nz is such a small country, it's hard to source anything. Thanks

I'd say aim for at least 6L minimum if you can.. Not something you can get in a disposable size.. But better then 2.2L.. At 2.2L is too risky in my opinion.. Also all of this is assuming you have perfect flow control.. The max dog brewing regulators were medical 15 lpm oxygen click regulators with either a CGA-580 (for NA) or a type 50 (for EU/AU/NZ) stem and connector retrofitted onto them replacing the O2 connector. So I'd say it's better to find a gas supplier and either modify a O2 regulator to take type 50, or find a good flow control for type 50 and get a proper cylinder.
If you don't have good flow control always aim for more gas.

I just don't want to see people end up vegetables. That's all I'll say on all of this as I don't want to spoon feed too much info on this all. Good luck friend.

 

[gardenhouse]

I'd say aim for at least 6L minimum if you can.. Not something you can get in a disposable size.. But better then 2.2L.. At 2.2L is too risky in my opinion.. Also all of this is assuming you have perfect flow control.. The max dog brewing regulators were medical 15 lpm oxygen click regulators with either a CGA-580 (for NA) or a type 50 (for EU/AU/NZ) stem and connector retrofitted onto them replacing the O2 connector. So I'd say it's better to find a gas supplier and either modify a O2 regulator to take type 50, or find a good flow control for type 50 and get a proper cylinder.
If you don't have good flow control always aim for more gas.

I just don't want to see people end up vegetables. That's all I'll say on all of this as I don't want to spoon feed too much info on this all. Good luck friend.

Yeah, i totally understand mate. The thing is NZ is such a small country, small population and isolated, i've been searching online, it's very hard to find nitrogen gas cylinders above 2.2litre, i think that's why Nitschke wrote 2.2 litre as he's australian, aus and nz have a lot of similarities.

Maybe someone from AU Or NZ here can help? Where to source Nitrogen tank above 2.2 liters?

Also i'm thinking, this may sound a stupid idea but knock my head off if it is

What if i buy a few 2.2litre nitrogen gas cylinder, say 4x or 5x 2.2 litre nitrogen cylinder and lock myself up in the car and open all the gases all at once while holding my breath and exhale all the oxygen from my lungs . Will this work?

 

[-L-]

Yeah, i totally understand mate. The thing is NZ is such a small country, small population and isolated, i've been searching online, it's very hard to find nitrogen gas cylinders above 2.2litre, i think that's why Nitschke wrote 2.2 litre as he's australian, aus and nz have a lot of similarities.

Maybe someone from AU Or NZ here can help? Where to source Nitrogen tank above 2.2 liters?

Also i'm thinking, this may sound a stupid idea but knock my head off if it is

What if i buy a few 2.2litre nitrogen gas cylinder, say 4x or 5x 2.2 litre nitrogen cylinder and lock myself up in the car and open all the gases all at once while holding my breath and exhale all the oxygen from my lungs . Will this work?

The car with 2.2L cylinders idea won't work.. You'd likely just give yourself a headache at best. The only way to do that would be with LN2 poured over a warm surface, but that is a whole other thing, and I don't really recommend that for various reasons.

I was actually born in Christchurch.. So know NZ somewhat well however moved overseas when I was rather young. Anyways, if you could get on with a major three letter gas supplier that starts with B_ _ would be your best bet, the hardware store chain that sounds similar to "bunny" also carries things.... But that is all I will say. If you figured out how to seek out and join this forum, you can figure this out.. But it's not something that will just be delivered to your door.. You'll have to put in a bit of work. Take care.

 

[IrishBug]

I am looking at these same 2.2l tanks. I am trying to determine if I could use 3 of them and 3 regulators with 3 tubes going into the bag.

With each set to 5L per min this would provide about 40 mins of gas.

I can't see why it wouldn't work but I'm pretty early into my research.

 

[-L-]

I am looking at these same 2.2l tanks. I am trying to determine if I could use 3 of them and 3 regulators with 3 tubes going into the bag.

With each set to 5L per min this would provide about 40 mins of gas.

I can't see why it wouldn't work but I'm pretty early into my research.

I mean you theoretically could.. People used to do that with the balloon time tanks before they were diluted with air. I'd say go for closer to 6lpm per tank for flow though if you were REALLY going to try that.. I just see it as more risky, more to go wrong having more tanks, tubing, regulators, ect.. More moving parts.. It's also more expensive then just finding your local gas supplier and getting a single properly sized cylinder and regulator.

I'd just say find a gas supplier.. I personally wouldn't want to attempt inert gas like that.

 

[gardenhouse]

I'd say aim for at least 6L minimum if you can.. Not something you can get in a disposable size.. But better then 2.2L.. At 2.2L is too risky in my opinion.. Also all of this is assuming you have perfect flow control.. The max dog brewing regulators were medical 15 lpm oxygen click regulators with either a CGA-580 (for NA) or a type 50 (for EU/AU/NZ) stem and connector retrofitted onto them replacing the O2 connector. So I'd say it's better to find a gas supplier and either modify a O2 regulator to take type 50, or find a good flow control for type 50 and get a proper cylinder.
If you don't have good flow control always aim for more gas.

I just don't want to see people end up vegetables. That's all I'll say on all of this as I don't want to spoon feed too much info on this all. Good luck friend.

The car with 2.2L cylinders idea won't work.. You'd likely just give yourself a headache at best. The only way to do that would be with LN2 poured over a warm surface, but that is a whole other thing, and I don't really recommend that for various reasons.

I was actually born in Christchurch.. So know NZ somewhat well however moved overseas when I was rather young. Anyways, if you could get on with a major three letter gas supplier that starts with B_ _ would be your best bet, the hardware store chain that sounds similar to "bunny" also carries things.... But that is all I will say. If you figured out how to seek out and join this forum, you can figure this out.. But it's not something that will just be delivered to your door.. You'll have to put in a bit of work. Take care.

Oo you're a kiwi. :)

I'v searched the company with B_ _, apparently I need to apply for a trade account with them, can't just buy as a public. But i found another company that sells to public



They say it contains 2 m3 nitrogen gas, so converted to L is 2,000 litres , that's too much ?

 

[-L-]

They say it contains 2 m3 nitrogen gas, so converted to L is 2,000 litres , that's too much ?

Confirm with them, the size... But that sounds perfect. Better to have too much then too little and be left a vegetable. That seems a lot more solid though then your original 2.2L tanks.

 

[gardenhouse]

Confirm with them, the size... But that sounds perfect. Better to have too much then too little and be left a vegetable. That seems a lot more solid though then your original 2.2L tanks.

Yes they confirm, they said the tank is 2 m3 full of nitrogen. 2,000 litres nitrogen is a lot.

if I release it in the car, lock myself up in the car. and let the gas be released slowly through regulator, and take sleeping pill before the attempt, will this work?

I'm quite Claustrophobic with the idea of putting plastic exit bag over my head.

 

[-L-]

Yes they confirm, they said the tank is 2 m3 full of nitrogen. 2,000 litres nitrogen is a lot.

if I release it in the car, lock myself up in the car. and let the gas be released slowly through regulator, and take sleeping pill before the attempt, will this work?

I'm quite Claustrophobic with the idea of putting plastic exit bag over my head.

No that won't work... It can't displace a full car worth of air. The bag is a must with this. If that makes you squeamish there are other methods. Or maybe take it as a sign that you may not be ready to go?
If you try to just open that cylinder in a car you will just waste the gas.. You might feel light headed or sick due to lower oxygen levels in the car, but it's unlikely to actually kill you. You'd just be wasting the N2.

 

[gardenhouse]

No that won't work... It can't displace a full car worth of air. The bag is a must with this. If that makes you squeamish there are other methods. Or maybe take it as a sign that you may not be ready to go?
If you try to just open that cylinder in a car you will just waste the gas.. You might feel light headed or sick due to lower oxygen levels in the car, but it's unlikely to actually kill you. You'd just be wasting the N2.

Thanks for the prompt reply. I see. I wanna go but in a comfortable way that make me less panicky…cliche

If the exit bag is replaced with pharmatical
oxygen mask, i'll tape the holes on the mask, will it work?

 

[Intoxicated]

No that won't work... It can't displace a full car worth of air. The bag is a must with this. If that makes you squeamish there are other methods. Or maybe take it as a sign that you may not be ready to go?
If you try to just open that cylinder in a car you will just waste the gas.. You might feel light headed or sick due to lower oxygen levels in the car, but it's unlikely to actually kill you. You'd just be wasting the N2.

Asphyxiation to death in a car is definitely possible if you manage to reduce the partial pressure of oxygen near your head to 6 kPa or below and maintain it at such a low level for a sufficiently long period. This would require a lot of nitrogen though - probably, much more than can be stored in 5 x 2.2 L cylinders. There is a known case of 3 deaths caused by asphyxiation with nitrous oxide inside the cab of a pickup truck:

3 Found Dead After Inhaling Laughing Gas

Three young men were found dead early Friday, apparently asphyxiated after inhaling nitrous oxide--so-called laughing gas--emitted from an 80-pound canister they held across their laps in the sealed cab of a pickup truck.

www.latimes.com

 

[-L-]

Asphyxiation to death in a car is definitely possible if you manage to reduce the partial pressure of oxygen near your head to 6 kPa or below and maintain it at such a low level for a sufficiently long period. This would require a lot of nitrogen though - probably, much more than can be stored in 5 x 2.2 L cylinders. There is a known case of 3 deaths caused by asphyxiation with nitrous oxide inside the cab of a pickup truck:

3 Found Dead After Inhaling Laughing Gas

Three young men were found dead early Friday, apparently asphyxiated after inhaling nitrous oxide--so-called laughing gas--emitted from an 80-pound canister they held across their laps in the sealed cab of a pickup truck.

www.latimes.com

Three young men were found dead early Friday, apparently asphyxiated after inhaling nitrous oxide--so-called laughing gas--emitted from an 80-pound canister they held across their laps in the sealed cab of a pickup truck.

Ok.. If you do the rough math.. A 80lbs cylinder like that at an ambient room temp of 20c is roughly around 19,954L of gas.. To put that in perspective the above N2 tank posted is around 2,000L.. So it would take around 9.977 (really 10x rounding up) of those 2,000L tanks to produce the same effect as that truck incident..

The other thing to keep in mind is that the molar mass of nitrous oxide is 44.01 g/mol versus nitrogen at 28.01 g/mol. It's heavy. The closest inert gas to nitrous oxide is Argon I think, at 39.95 gl/mol in terms of weight. Why I mention this is that it displaces air far easier when you have a heavier gas, as air is mostly nitrogen, nitrous being the most heavy of them all in this little comparison. It can fill a space and displace oxygen far easier then nitrogen can due to the mass forcing air out of the space. Furthermore when gases come out of high pressure cylinders in general, they're typically around -40c which keeps them even more dense initially. Dense and heavy is a killer combo for an inert envirement.

But with all of this said, why bother with any of this when there are easier methods that bind to your hemoglobin to form carboxyhemoglobin.. For larger spaces like a car that is far better as you don't need a total inert envirement.... It accomplishes the same thing in the end really and is far cheaper if you know what you are doing.

If the exit bag is replaced with pharmatical
oxygen mask, i'll tape the holes on the mask, will it work?

Likely not... But I am tired of spoon feeding info so will leave it at that. Don't mean to sound like a dick, just sleep deprived and tired, and probably going to take a break from this forum for a long time. Good luck friend.

 

[Intoxicated]

The other thing to keep in mind is that the molar mass of nitrous oxide is 44.01 g/mol versus nitrogen at 28.01 g/mol. It's heavy. The closest inert gas to nitrous oxide is Argon I think, at 39.95 gl/mol in terms of weight. Why I mention this is that it displaces air far easier when you have a heavier gas, as air is mostly nitrogen, nitrous being the most heavy of them all in this little comparison. It can fill a space and displace oxygen far easier then nitrogen can due to the mass forcing air out of the space. Furthermore when gases come out of high pressure cylinders in general, they're typically around -40c which keeps them even more dense initially. Dense and heavy is a killer combo for an inert envirement.

Denser gases just tend move to the bottom more than to the top. In case if your head is placed near to the ceiling and if the gas can leak outside at the floor, higher density can imply less effective oxygen displacement at your head.

But with all of this said, why bother with any of this when there are easier methods that bind to your hemoglobin to form carboxyhemoglobin.. For larger spaces like a car that is far better

It depends. If you obtain an industrial tank with CO, then yes, it's easy. Burning something in a car seems to be a pain in the ass, and I can't recall any easy lab methods of producing CO.

A car may be suitable for killing multiple people at once. Otherwise, if only single suicide is planned, it makes sense to use as smaller space as possible - whether it's asphyxiation via oxygen displacement or poisoning by a highly toxic gas.

as you don't need a total inert

"Total" is unnecessary. It's enough to displace 72 - 75% air in the inhaled mixture in order to reduce oxygen concentration to deadly ≤6%. Some sources suggest that even 6 - 8% O₂ produces death quickly, f.e.,

https://www.nyc.gov/assets/fdny/downloads/pdf/business/cof-g71-noe-study-materials.pdf (pp. 57 - 58)

OXYGEN CONTENT (% by volume)	EFFECTS AND SYMPTOMS (at atmospheric pressure)
15 - 19%	Decreased ability to work strenuously. May impair coordination and may induce early symptoms in persons with coronary, pulmonary, or circulatory problems.
12 - 15%	Respiration increased in exertion, pulse up, impaired coordination, perception, and judgment.
10 - 12%	Respiration further increases in rate and depth; poor judgment; lips blue.
8 - 10%	Mental failure; fainting, unconsciousness, ashen face; blueness of lips; nausea, and vomiting.
6 - 8%	8 minutes, 100% fatal; 6 minutes, 50% fatal; 4-5 minutes, recovery with treatment.
4 - 6%	Coma in 40 seconds; convulsions; respiration ceases, death.

Although the source explicitly mentions that "it should be understood that individual reactions may be different from those listed" and "100% fatal" may be an inaccurate wording, I think that surviving after continuous exposure to ≤6% O₂ at the standard atmospheric pressure (and excluding extraordinary conditions like severe hypothermia) for 30 minutes is very unlikely.

 

[Tommen Baratheon]

Sorry if this is a repost, This isn't my initial method to CBT, of course if N was available, it would that, but i live in the country with the strictest border force in the western world, my chloroquine bought online from India was seized, I'm sure if I buy SN overseas, they will seize it as well since it's actually available locally but hard to get without proper license.

All kind of SH tools are strictly controlled, I hate this country. So, the only available source locally is NITROGEN, I would like to know if these would work....

I live with my partner, I have no idea where to hide this stuff, hope the gas cylinder is not big....

View attachment 200041


View attachment 200042

Thanks

Need more data. What's the pressure (bar) and what purity (%) is it? Do you have a detailed datasheet of the cylinder?

 

[-L-]

Denser gases just tend move to the bottom more than to the top. In case if your head is placed near to the ceiling and if the gas can leak outside at the floor, higher density can imply less effective oxygen displacement at your head.

But that is kinda my point.. You are essentially trying to create a swimming pool of gas filling the space from the bottom up, purging the space, the air rises to the top because it is lighter at around 28-30 g/mol, then your heavier inert gas like argon or nitrous displaces it quite well...

It is the same concept as is used in controlled atmosphere stunning (CAS) in slaughter houses / livestock processing. For CAS they often resort to CO2 due to it being prevalent and cheap despite it's horrible hypercapnic alarm response.. The reason they use CO2 though is because it is heavy, 44 g/mol (same mass as nitrous oxide).
They build a pit, fill it full of CO2 and then lower the livestock via a cradle into it.. The livestock go from normal air to a 100% CO2 environment in a matter of seconds and die. All due to the physics of gas density. It's also what keeps it from spilling out into the factory floor.

You could also get away with using argon, even with it's slightly lower molar mass it would be a negligible difference compared to nitrous IMHO and manage to avoid a poor hypercapnic response.

If you don't create a sufficient inert environment I'd say your odds of ending up a vegetable increase, simple as that. By using a heavy enough gas you can do that, if you know what you are doing and understand the physics of it.

The heaviness and density are a feature not a bug.

It depends. If you obtain an industrial tank with CO, then yes, it's easy. Burning something in a car seems to be a pain in the ass, and I can't recall any easy lab methods of producing CO.

I mean something like HCOOH / Na + H₂SO₄ provided you have proper filtering / can pass it up through water. Don't have to directly burn anything outright.

"Total" is unnecessary. It's enough to displace 72 - 75% air in order to reduce oxygen concentration to deadly ≤6%. Some sources suggest that even 6 - 8% O₂ produces death quickly, f.e.,

I'd consider that close enough to "fully inert" for purposes of suicide.
My wording my be poor as I am still sleep deprived so if anything comes off as nonsensical / incoherent that is why.

 

[Intoxicated]

But that is kinda my point.. You are essentially trying to create a swimming pool of gas filling the space from the bottom up, purging the space, the air rises to the top because it is lighter at around 28-30 g/mol, then your heavier inert gas like argon or nitrous displaces it quite well...

I'm kinda skeptical about making a pool out of a gas that is less than 2x denser than air. It should be quite doable with very heavy gases like SF₆ or C₄F₁₀, but N₂O may just quickly diffuse with air due to thermal motion and penetration of gas streams, and in mixtures of such relatively non-heavy gases the particles are barely separated by the gravity force due to their very high speeds (this is why nearly homogeneous He/O₂ mixtures exist). Surely, relative heaviness of N₂O would affect its distribution over altitudes to some extent, but I suspect that this would only remotely resemble the bottom-to-top displacement of air by water. Also making a rising pool would require careful sealing of holes below the head level, through which the heavier gas could escape the car.

It is the same concept as is used in controlled atmosphere stunning (CAS) in slaughter houses / livestock processing. For CAS they often resort to CO2 due to it being prevalent and cheap despite it's horrible hypercapnic alarm response.. The reason they use CO2 though is because it is heavy, 44 g/mol (same mass as nitrous oxide).
They build a pit, fill it full of CO2 and then lower the livestock via a cradle into it.. The livestock go from normal air to a 100% CO2 environment in a matter of seconds and die. All due to the physics of gas density.

CO₂ is an entirely different beast, since it can work as both simple asphyxiant (displacing oxygen) and chemical asphyxiant. I don't remember what concentrations are needed to knock out animals, but for humans 30% CO₂ is enough to produce unconsciousness in about half a minute (even if the remaining 70% is O₂) and death if you keep breathing it (regardless of how much oxygen is added). Also CO₂ seems to produce respiratory arrest faster than simple oxygen displacement would do. So killing by carbon dioxide should be easier than killing by nitrogen asphyxiation due to chemical properties of carbon dioxide. Since CO₂ can be an effective killer at concentrations that are significantly smaller than the percent of air displacement needed in case of using pure nitrogen, CO₂ should be more fail-safe for euthanasia.

The heaviness and density are a feature not a bug.

I'd probably rather direct the hose from the cylinder towards my head and rely on radial air displacement than hope that vertical displacement works as you suggest.

I mean something like HCOOH / Na + H₂SO₄ provided you have proper filtering / can pass it up through water.

HCOOH is a remarkably unpleasant substance to work with, since it's a potent irritant with low odor threshold. HCOONa looks a wiser choice, yet I would be concerned about the possibility of overheating and boiling when mixing huge amounts of the reagents needed to produce enough CO to fill the car. Building an apparatus that would either mix the reagents gradully or effectively dissipate heat and also filter out HCOOH vapours doesn't look much easier than doing tricky things with nitrogen cylinders.

 

[DeadManLiving]

Alternatively, 1L of LN2 ≈ 700 L or 24 SCF of N2 Gas. Volume of an average sedan cabin: Small, < 130 cubic feet (3,680 L) / Midsize, 130–159 cubic feet (3,680–4,500 L) ≈ 150 SCF or 4,500L

30L LN2 ≈ 21,000 Liters N2 Gas or 730 SCF displacement.

So 30 L of LN2 spilled would produce and pressurize a cabin to displace over 4 air change cycles.

Obviously many other variables to account for but tired now.

 

[IrishBug]

Need more data. What's the pressure (bar) and what purity (%) is it? Do you have a detailed datasheet of the cylinder?

The one I'm looking at is 110 Bar - 0.24m3 gas in each bottle 100% nitrogen. Do you think 3 @ 6l per min each work?

 

[Intoxicated]

Alternatively, 1L of LN2 ≈ 700 L or 24 SCF of N2 Gas. Volume of an average sedan cabin: Small, < 130 cubic feet (3,680 L) / Midsize, 130–159 cubic feet (3,680–4,500 L) ≈ 150 SCF or 4,500L

30L LN2 ≈ 21,000 Liters N2 Gas or 730 SCF displacement.

So 30 L of LN2 spilled would produce and pressurize a cabin to displace over 4 air change cycles.

I wonder how comfortable it would be there after releasing a lot of gas having the initial temperature of nearly -196 °C )

 

[gardenhouse]

I wonder how comfortable it would be there after releasing a lot of gas having the initial temperature of nearly -196 °C )

Hmm true i wonder about that too?

 

[Tommen Baratheon]

The one I'm looking at is 110 Bar - 0.24m3 gas in each bottle 100% nitrogen. Do you think 3 @ 6l per min each work?

2,2 liter (compressed) x 110 bar = 242 liter

I know that with helium you'd need 15 l/min. with and exit bag for at least 15 minutes and 30 minutes to be on the sure side. So you need 450 liter.

I don't think you can do 3x6=18 and I'm not 100% sure about the flow rate for nitrogen.

There's a whole topic about this and it's in The Peaceful Pill handbook. Have you looked at those?