3 ms·

I really cringe at the thought of H2 at home for multiple reasons. - a wide explosive concentration range (LEL to UEL). The wider the range, the more opportuni

I really cringe at the thought of H2 at home for multiple reasons. - a wide explosive concentration range (LEL to UEL). The wider the range, the more opportunity you have for encountering an explosive mix if there's a leak. - a low ignition energy. A small static discharge has more than enough energy to ignite H2. - It's a functionally difficult gas to work with. It's an escape artist. You have to use the right materials. You have issues like embrittlement, hydrogen stress cracking. It's not great from a volumetric energy density perspective - more watts are required for pumping X units of energy than a fuel with a higher energy density. To bump up the energy density, you compress it and or liquefy it.. which costs energy, you've got high working pressures, and are possibly dealing with cryogenics as well.

westurner 4y ago
FWIU actually Green hydrogen is where they're actually considered the total "path to value". Charge the grid with it; whatever it is, if it's "economical": charge the grid with it. > [ Hydrogen Safety: https://en.wikipedia.org/wiki/Hydrogen_safety https://en.wikipedia.org/wiki/Hydrogen_safety ; videos: [ ]] >> Contents: Prevention, Inerting and purging, Ignition source management (two rocks, HVAC, lighting, ), Mechanical integrity and reactive chemistry, Leaks and flame detection systems, Ventilation and flaring (all facilities that process Hydrogen must have anti-static ventilation systems), Inventory management and facility spacing, Cryogenics, Human factors, Incidents, *Hydrogen codes and standards*, Guidelines* Would capturing CO2 and water with the same or adjacent PV/TPV+ panels help mitigate Hydrogen Hazard? FWIU, Aerogels and hydrogels can be made from CO2.
- c_o_n_v_e_x 4y ago
  A possibility would be to put the H2 into a different storage medium like ammonia or methanol, rather than storing it as gaseous hydrogen.
  - westurner 4y ago
    "With a plan to decarbonize heating systems with hydrogen, Modern Electron raises $30M" (2022) https://techcrunch.com/2022/02/03/with-a-plan-to-decarbonize-home-heating-with-hydrogen-modern-electron-raises-30m/ https://techcrunch.com/2022/02/03/with-a-plan-to-decarbonize... : > The second, which is still under development but about to make its debut, is what they’re calling the Modern Electron Reserve, which rather than burning natural gas — which is mostly CH4, or methane — reduces it to solid carbon (in the form of graphite) and hydrogen gas. The gas is passed on to the furnace to be burned, and converted to both heat and energy, while the graphite is collected for disposal or reuse. And there's a picture of what's left after they extract just the Hydrogen from PNG/LNG for one day of home heat. Letting the grass grow longer is one way to absorb carbon locally; longer grass is more efficient at absorbing carbon (e.g. carbon emitted by comparatively inefficiently burning natural gas for heat (an exothermic critical reaction))

westurner 4y ago

FWIU actually Green hydrogen is where they're actually considered the total "path to value". Charge the grid with it; whatever it is, if it's "economical": charge the grid with it. > [ Hydrogen Safety: https://en.wikipedia.org/wiki/Hydrogen_safety https://en.wikipedia.org/wiki/Hydrogen_safety ; videos: [ ]] >> Contents: Prevention, Inerting and purging, Ignition source management (two rocks, HVAC, lighting, ), Mechanical integrity and reactive chemistry, Leaks and flame detection systems, Ventilation and flaring (all facilities that process Hydrogen must have anti-static ventilation systems), Inventory management and facility spacing, Cryogenics, Human factors, Incidents, *Hydrogen codes and standards*, Guidelines* Would capturing CO2 and water with the same or adjacent PV/TPV+ panels help mitigate Hydrogen Hazard? FWIU, Aerogels and hydrogels can be made from CO2.

c_o_n_v_e_x 4y ago
A possibility would be to put the H2 into a different storage medium like ammonia or methanol, rather than storing it as gaseous hydrogen.
- westurner 4y ago
  "With a plan to decarbonize heating systems with hydrogen, Modern Electron raises $30M" (2022) https://techcrunch.com/2022/02/03/with-a-plan-to-decarbonize-home-heating-with-hydrogen-modern-electron-raises-30m/ https://techcrunch.com/2022/02/03/with-a-plan-to-decarbonize... : > The second, which is still under development but about to make its debut, is what they’re calling the Modern Electron Reserve, which rather than burning natural gas — which is mostly CH4, or methane — reduces it to solid carbon (in the form of graphite) and hydrogen gas. The gas is passed on to the furnace to be burned, and converted to both heat and energy, while the graphite is collected for disposal or reuse. And there's a picture of what's left after they extract just the Hydrogen from PNG/LNG for one day of home heat. Letting the grass grow longer is one way to absorb carbon locally; longer grass is more efficient at absorbing carbon (e.g. carbon emitted by comparatively inefficiently burning natural gas for heat (an exothermic critical reaction))