Difference between revisions of "Bosch reaction"
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| − | The '''Bosch reaction''' is the exothermic reduction of [[carbon dioxide]] by [[hydrogen]] in the presence of a [[catalyst]] such as [[nickel]] to form [[water]] and elemental [[carbon]].<ref name="Crump">W.J. Crump - ''Issues and solutions for short-duration flights: A historical perspective on physiochemical systems'' in S.E. Churchill ed. ''Fundamentals of space life sciences'' vol. 2. 1997. ISBN 0-89464-051-8 pp. 273-276.</ref><br /> | + | The '''Bosch reaction'''<ref>Wikipedia: https://en.wikipedia.org/wiki/Bosch_reaction</ref> is the exothermic reduction of [[carbon dioxide]] by [[hydrogen]] in the presence of a [[catalyst]] such as [[nickel]] to form [[water]] and elemental [[carbon]].<ref name="Crump">W.J. Crump - ''Issues and solutions for short-duration flights: A historical perspective on physiochemical systems'' in S.E. Churchill ed. ''Fundamentals of space life sciences'' vol. 2. 1997. ISBN 0-89464-051-8 pp. 273-276.</ref><br /> |
<math>CO_2 + 2H_2 \rightarrow C + 2H_2O + heat</math> | <math>CO_2 + 2H_2 \rightarrow C + 2H_2O + heat</math> | ||
Latest revision as of 11:34, 22 June 2021
The Bosch reaction[1] is the exothermic reduction of carbon dioxide by hydrogen in the presence of a catalyst such as nickel to form water and elemental carbon.[2]
Contents
Uses
- Preventing toxic carbon dioxide buildup in a spacecraft atmosphere[2].
- Provides a source of carbon.
- Results in production of either water or oxygen:
- If the hydrogen for the process must come from water (most likely by electrolysis), the Bosch reaction results in a net release of oxygen for breathing, for water filter production, as a metallurgical additive or as a chemical reagent.
- Alternatively, in an Earth-supported colony that shipped molecular hydrogen from Earth, it would allow water production from the Martian atmosphere (within the limits of available hydrogen).
Disadvantages
- The catalyst requires regular cleaning or replacement due to the inhibiting effect of the layer of carbon that forms on it.[2]
- The reaction only takes place at a fairly high temperature and so places a drain on energy and thermal control resources in a spacecraft/colony.[2]
