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Is this true? Sounds exciting if so.

• thot_experiment 4y ago
  It's true in a naive sense but the natural gas must also be extracted, refined, transported and the infrastructure to convert it into electricity and to perform the carbon capture must be built. So yes carbon capture using fossil fuels isn't outright impossible because of physics, but practically speaking it's not real because the rest of the chain lowers the already marginal efficiency.
  • elil17 4y ago
    It's not really marginal efficiency. It's ~60% efficiency for a natural gas system, higher for a system with point-source capture on that natural gas. I'm not sure how exactly it pans out with the inefficiency of extraction but as I understand it those are fairly minor. That's not to say that I think DAC is a silver bullet or something - it's obviously not because the CAPEX costs are huge at the moment.
    • thot_experiment 4y ago
      Yeah for sure, you're right that I shouldn't have said marginal as the situation wrt natural gas is decent (though that is the best case fossil fuel). It's important to be accurate about these things.