Everything you want to know about hydrogen economy.
Thread 👇
Thread 👇
1/Why bother?
Burning of fossil fuels produces CO2, a greenhouse gas emissions (GHG).
To meet Paris agreement goals, countries are looking at ways to reduce carbon footprints.
Hydrogen stands out as a clean fuel!
Burning hydrogen produces water.
H2 + 0.5 O2 --> H2O
Burning of fossil fuels produces CO2, a greenhouse gas emissions (GHG).
To meet Paris agreement goals, countries are looking at ways to reduce carbon footprints.
Hydrogen stands out as a clean fuel!
Burning hydrogen produces water.
H2 + 0.5 O2 --> H2O
The (hot) combustion energy can be converted to electricity.
OR
You can use a fuel cell to combine oxygen and hydrogen to form water with production of electricity.
OR
You can use a fuel cell to combine oxygen and hydrogen to form water with production of electricity.
2/ Production
Hydrogen production techniques
* Gray H2 : Steam methane reforming (SMR) to convert natural gas or biomass
* Blue: Production from fossil fuel paired with carbon capture
* Green: electrolysis or splitting water using renewable energy
Hydrogen production techniques
* Gray H2 : Steam methane reforming (SMR) to convert natural gas or biomass
* Blue: Production from fossil fuel paired with carbon capture
* Green: electrolysis or splitting water using renewable energy
3/ Storage and transport
1 kg of hydrogen has about the same energy as a gallon of gasoline.
But the volumetric energy density of hydrogen is low.
Value chain post-production:
* low pressure storage
* compressor
* high pressure storage (700 bar)
* Cooling
* Dispensing
1 kg of hydrogen has about the same energy as a gallon of gasoline.
But the volumetric energy density of hydrogen is low.
Value chain post-production:
* low pressure storage
* compressor
* high pressure storage (700 bar)
* Cooling
* Dispensing
4/ Refueling costs
Just like battery-electric vehicles, hydrogen fuel cell electric vehicles (FCEVs), including passenger cars and buses,
Cost of refueling $14/kg =~$6/gallon gasoline
Just like battery-electric vehicles, hydrogen fuel cell electric vehicles (FCEVs), including passenger cars and buses,
Cost of refueling $14/kg =~$6/gallon gasoline
5/Bottom line
Economics for H2 and particularly blue/green hydrogen are expensive.
Policy and public sentiments for decarbonization are going to be a big driver for change.
Nikola (not Tesla) would agree:
wardsauto.com/powertrain/how…
Economics for H2 and particularly blue/green hydrogen are expensive.
Policy and public sentiments for decarbonization are going to be a big driver for change.
Nikola (not Tesla) would agree:
wardsauto.com/powertrain/how…
