How are global warming and world population expansion linked?

alancalverd · « **Reply #200 on:** 29/10/2023 21:02:16 »

Quote from: Bored chemist on 29/10/2023 00:16:03

Quote from: alancalverd on 28/10/2023 23:18:39
Who "they"?
Quote from: acsinuk on 28/10/2023 09:37:30
Gaza city refugees

Improbable. As I said earlier, the inhabitants of the artificial territory known as Palestine in 1920 are all dead by now, not living in Gaza City.

alancalverd · « **Reply #201 on:** 29/10/2023 21:07:01 »

Quote from: Petrochemicals on 29/10/2023 00:20:28

it would be impossible to make a jet with a liquid,

Pity nobody ever told the folk who make and fly them. Poor benighted souls, spraying liquid kerosene into what they naively call a "combustion" chamber in the vain hope of generating thrust. I used to do the same thing with a hot-air balloon. Complete waste of liquid fuel, obviously, as it was magic fairy dust that made it fly.

paul cotter · « **Reply #202 on:** 30/10/2023 14:36:58 »

Petro, I have no intention of doing so, as all my interests are of a scientific nature. I do however empathise with suffering people, regardless of race, anywhere on our planet.

Bored chemist · « **Reply #203 on:** 30/10/2023 15:04:45 »

Quote from: paul cotter on 29/10/2023 13:58:42

Not getting into the current phase of this thread but I think the politics should be dropped as it will only lead to flame wars with the thread being locked, my 2cents.

Probably a good point

But...
Can we address the acceptability of this independently of the politics?

Quote from: acsinuk on 28/10/2023 09:37:30

refusing free food aid unless it has been treated with a contraceptive.

Petrochemicals · « **Reply #204 on:** 30/10/2023 16:12:02 »

Quote from: alancalverd on 29/10/2023 21:07:01

Quote from: Petrochemicals on 29/10/2023 00:20:28
it would be impossible to make a jet with a liquid,

spraying liquid kerosene into what they naively call a "combustion" chamber

Do you mean aeros hole or similar?

alancalverd · « **Reply #205 on:** 30/10/2023 17:01:28 »

It's just a nozzle, not even as fine as a diesel injector.

Petrochemicals · « **Reply #206 on:** 30/10/2023 17:16:19 »

Quote from: alancalverd on 30/10/2023 17:01:28

It's just a nozzle, not even as fine as a diesel injector.

aero-sol

Quote

The term aerosol commonly refers to the particulate/air mixture, as opposed to the particulate matter alone.

alancalverd · « **Reply #207 on:** 30/10/2023 18:46:37 »

What is sprayed in is a liquid, not an aerosol. It vaporises pretty quickly.

Petrochemicals · « **Reply #208 on:** 30/10/2023 21:21:54 »

Quote from: alancalverd on 30/10/2023 18:46:37

What is sprayed in is a liquid, not an aerosol. It vaporises pretty quickly.

Aero sol

alancalverd · « **Reply #209 on:** 31/10/2023 09:31:44 »

No. Vapor is a molecular state, aerosol is a particulate or droplet state.

Petrochemicals · « **Reply #210 on:** 31/10/2023 16:03:02 »

Quote from: alancalverd on 31/10/2023 09:31:44

No. Vapor is a molecular state, aerosol is a particulate or droplet state.

Aerosol is a mixture, not a liquid. Vapour is not a liquid.

alancalverd · « **Reply #211 on:** 31/10/2023 17:17:02 »

So you squirt a liquid with a flash point of around 50 degC into a combustion chamber with a flame temperature of around 2000 degC. Where is the aerosol?

Petrochemicals · « **Reply #212 on:** 01/11/2023 18:21:50 »

I suspect it would be in a cloud of suspended particles in the exhaust.

paul cotter · « **Reply #213 on:** 01/11/2023 20:10:39 »

The exhaust will be water vapour and carbon dioxide with maybe a trace of soot(very little in a modern engine, older ones were a bit dirtier) but still no aerosol.

Petrochemicals · « **Reply #214 on:** 01/11/2023 20:53:01 »

Quote from: paul cotter on 01/11/2023 20:10:39

The exhaust will be water vapour and carbon dioxide with maybe a trace of soot(very little in a modern engine, older ones were a bit dirtier) but still no aerosol.

Is soot in air not an aerosol? Are the petrol fumes at start up liquid in a non aerosol form, is "add blue" functionless?

paul cotter · « **Reply #215 on:** 01/11/2023 21:23:59 »

At start up petrol(gasoline) is in the form of a spray which rapidly evaporates during compression. Adblue is urea(as in urine) and it's purpose is to react with nitrogen oxides(nasty pollutants) and reduce them to nitrogen gas. Soot may or may not be in the form of an aerosol, I don't know offhand, but the amount in a modern engine is negligible.

Petrochemicals · « **Reply #216 on:** 01/11/2023 22:33:40 »

Quote from: paul cotter on 01/11/2023 21:23:59

At start up petrol(gasoline) is in the form of a spray which rapidly evaporates during compression. Adblue is urea(as in urine) and it's purpose is to react with nitrogen oxides(nasty pollutants) and reduce them to nitrogen gas. Soot may or may not be in the form of an aerosol, I don't know offhand, but the amount in a modern engine is negligible.

Do tell Alan.

alancalverd · « **Reply #217 on:** 02/11/2023 17:29:55 »

My posts related to kerosene and jet engines. Soot in the exhaust is an indication of incomplete combustion, rarely seen in modern civil aviation (when you are paying for the fuel, you want to burn it all) but I saw some impressive soot trails when the French military turned on the afterburners to intercept a wayward airliner.

Petrochemicals · « **Reply #218 on:** 02/11/2023 20:08:03 »

Quote from: alancalverd on 02/11/2023 17:29:55

My posts related to kerosene and jet engines.

as in the spray?

alancalverd · « **Reply #219 on:** 02/11/2023 20:19:13 »

Seems logical.