The Reaction Of Sabatier.
The Sabatier reaction (or process Sabatier) is named for its discoverer, French chemist Paul Sabatier.
It represents the reaction of hydrogen dioxide with carbon at elevated temperature and pressure in the presence of a catalyst – Nickel (or ruthenium with aluminum oxide) for the production of methane and water. The process is described by the following chemical reaction:
CO2 + 4H2 → CH4 + 2H2O + energy.
∆H = -165,0 kJ/mol.
To start the reaction requires some initial amount of energy/heat.
The Sabatier reaction is used to regenerate the water on the space station.
Pre-water using electrolysis decomposes into components: oxygen and hydrogen. Oxygen is used for respiration of astronauts. During respiration the oxygen, produces carbon dioxide that must be removed from the air and to get rid of it.
For its utilization and recovery in water uses the Sabatier reaction.
It is a vicious cycle which constantly repeats itself:
2H2O → O2 + 2H2 → (respiration) → CO2 + 2H2 + 2H2 (added) → 2H2O + CH4 (deleted).
In turn, the methane can also be subjected to pyrolysis, separating into components:
CH4 + heat → C + 2H2.
The use of the Sabatier reaction eliminates the delivery of a significant amount of water on the space station for oxygen production, in addition to water for drinking, hygiene, etc.
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