Hydrogen is an indirect greenhouse gas (radicals) 200 times more powerful than CO2

[Remundo]

interesting topic...

we are still lucky, H2 is reactive in the atmosphere to restore water, it would disrupt the formation of ozone in the upper atmosphere, it seems...

the factor 200 seems to me a sleeve effect therefore. A factor of 200 over a reduced time, to be balanced therefore. Because excess atmospheric CO2 lasts for thousands of years...

H2 has always been a big b@rdel to manufacture, transfer, store with catastrophic yields.

Even the best fuel cells have an efficiency of around 60%, which taking into account the upstream (obtaining, storage, transfer and losses) is not so brilliant...

for decades we have marveled in the media at H2+ 1/2 O2 -> H2O without taking a serious interest in the complete chain of the hydrogen sector.

I have written many times that the best storage of H2 is on carbon chains...

[GuyGadeboisTheBack]

i.e. with a GWP of 200 a CO2 equivalent of 60kg/MWh.

That is less than nuclear power, photovoltaics, wind power, coal, fuel oil.

[sicetaitsimple]

i.e. with a GWP of 200 a CO2 equivalent of 60kg/MWh.

That is less than nuclear power, photovoltaics, wind power, coal, fuel oil.

That coal or fuel oil, it is almost certain (with the reservations on the "200" and on the "1% leak".
Whether nuclear, PV or wind, you have it all wrong because to produce "low carbon" hydrogen you must first build a nuclear, PV or wind power plant to supply the hydrogen production plant! Knowing that the electricity to hydrogen conversion efficiency will be low in all cases.
Well, you lost a good opportunity not to talk bullshit, it can happen.....

[Christophe]

i.e. with a GWP of 200 a CO2 equivalent of 60kg/MWh.

That is less than nuclear power, photovoltaics, wind power, coal, fuel oil.

No because it's a calculation on primary energy…if you want electricity, you need *2,5…

[Christophe]

I have written many times that the best storage of H2 is on carbon chains...

Not sure… there is also nitrogen as a serious candidate!

[Ahmed]

The planned use of hydrogen does not correspond to a technical necessity, but an economic one. The injunction of fictitious capital can create illusions (this is the condition of its operation) only if it relies on a minimum of bearers of hope in tangible activities, even if they are of dubious utility (but usefulness is fortunately secondary!).

[sicetaitsimple]

The planned use of hydrogen does not correspond to a technical necessity, but an economic one. The injunction of fictitious capital can create illusions (this is the condition of its operation) only if it relies on a minimum of bearers of hope in tangible activities, even if they are of dubious utility (but usefulness is fortunately secondary!).

I assume you are talking about injection and not injunction, although .....
On the "bearers of hope", the simple fact of replacing the use of the H2 molecule where it is necessary (refining, production of fertilizers, etc.) by switching from methane reforming to electrolysis would still seem like progress to me (certainly no need to tell me it dictated by a tottering capitalism in search of all the opportunities to survive etc .. etc .. thank you in advance I am starting to know the song).

[Ahmed]

This is not the orientation of this sector of this gas, at least in Europe, and the cost price would be dissuasive for massive uses... Moreover, the latter are not as visible as the propulsion of vehicles in urban areas.

[Christophe]

The planned use of hydrogen does not correspond to a technical necessity, but an economic one. The injunction of fictitious capital can create illusions (this is the condition of its operation) only if it relies on a minimum of bearers of hope in tangible activities, even if they are of dubious utility (but usefulness is fortunately secondary!).

...

The basis of progress is hope...what did you type this message on? A pin? I highly doubt it !

[Christophe]

This is not the orientation of this sector of this gas, at least in Europe, and the cost price would be dissuasive for massive uses... Moreover, the latter are not as visible as the propulsion of vehicles in urban areas.

There are a few buses and a few pumps at H2 in Europe and a few taxis in Paris it seems to me (see about the car at H2)...

It remains a niche for the moment... but it is not the debate of THIS subject...