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Comment on Toyota builds experimental hydrogen-powered pizza oven and grill.

Knock_Knock_Lemmy_In@lemmy.world ⁨2⁩ ⁨months⁩ ago

At least environment-wise hydrogen leaks aren’t an issue:

Hydrogen is a strong indirect greenhouse gas.

The climate impact of hydrogen is about 34 times higher than CO2 when measured over a 20-year period. Looking at the impact over 100 years, the global warming potential reduces to between eight and 13 times.

Hydrogen causes this by stabilising methane in the atmosphere and creating tropospheric ozone and stratospheric water vapour.

euractiv.com/…/scientists-reiterate-concerns-abou…

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barsoap@lemm.ee ⁨2⁩ ⁨months⁩ ago
We shouldn’t be having methane in the atmosphere in the first place. Sure, if you produce the hydrogen from natural gas then you have a problem because that stuff comes with plenty of methane which will leak to a roughly comparable level.

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- Knock_Knock_Lemmy_In@lemmy.world ⁨2⁩ ⁨months⁩ ago
  
  We shouldn’t be having methane in the atmosphere in the first place.
  
  Ha. So we are banning farmers from owning livestock
  
  Sure, if you produce the hydrogen from natural gas then you have a problem because that stuff comes with plenty of methane which won’t suddenly stop leaking.
  
  Also if you inject hydrogen into the existing natural gas pipeline.
  
  The point here is that hydrogen leaks are very much an issue. Your previous statement was false.
  
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  - barsoap@lemm.ee ⁨2⁩ ⁨months⁩ ago
    Noone here is planning to inject hydrogen into existing pipelines. If anything, synthesising methane during the transition so that consumers only have to switch their burners once, from nat gas to hydrogen, and not first to nat gas + more hydrogen. Gotta switch whole municipalities at once doesn’t make sense to duplicate the last-mile gas pipes.
    
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    Knock_Knock_Lemmy_In@lemmy.world ⁨2⁩ ⁨months⁩ ago
    
    Noone here is planning to inject hydrogen into existing pipelines.
    
    Ok. Not you. But lots of people elsewhere in this thread.
    
    If anything, synthesising methane during the transition so that consumers only have to switch their burners once, from nat gas to hydrogen, and not first to nat gas + more hydrogen and then to pure hydrogen.
    
    Agree. Burning hydrogen has to be done carefully to avoid NOx and other side effects.
    
    And that’s not even clear yet, hydrogen pipes will even be a thing for private consumers.
    
    Agreed. Industrial green hydrogen is a necessity to remove fossil fuels.
    
    Residential hydrogen I am very sceptical about. Even 100% clean fuel cells burn too hot for domestic heating.
    
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