What can your Space Venus Colony make out of CO₂?

Plastics Straight from CO₂

  • Polyols
  • Polymers

Use Sabatier reaction as a stepping stone towards Plastic?

CO₂ + 4 H₂ → CH₄ + 2 H₂O + energy

Getting Hydrogen and Oxygen

H₂SO₄(aq) → H₂O(g) + SO₂(g) + ½ O₂(g) (thermochemical, T > 800 °C)
SO₂(aq) + 2 H₂O(l) → H₂SO₄(aq) + H₂(g) (electrochemical, T = 80-120 °C)
Net reaction: H₂O(l) → H₂(g) + ½ O₂(g)

Getting Oxygen

2CO₂ → 2CO + O₂
CO₂ + H₂  → CO + H₂O

Make Graphite from Bosch reaction

CO₂ + H₂ → CO + H₂O
CO + H₂ → C + H₂O

Methanol

Making plastic and great fuel (Mars Direct)

H₂ + CO₂ → H₂O + CO
2 CO + 4 H₂ → C₂H₄ 2 H₂O
  • Ethylene has just 2 hydrogen instead of 4 like methane. Saves on our hydrogen, but gives just as much fuel.
  • Much easier to turn into liquid. Don’t need to be as cold and high pressure as methane. Cryogenics not needed.
  • 50% less space. Less storage wasted.
  • Basic ingredient for making polyethylene and polypropylene and many other plastics.

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