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''' 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> | ||
==Uses== | ==Uses== | ||
| − | * [[Life support|Preventing toxic carbon dioxide buildup in a spacecraft atmosphere]]<ref name=Crump />. | + | |
| − | * Provides a source of carbon. | + | *[[Life support|Preventing toxic carbon dioxide buildup in a spacecraft atmosphere]]<ref name="Crump" />. |
| − | * Results in production of either water or oxygen: | + | *Provides a source of carbon. |
| − | ** If the hydrogen for the process must come from water (most likely by [[electrolysis]]), the Bosch reaction results in a | + | *Results in production of either water or oxygen: |
| − | ** 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). | + | **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== | ==Disadvantages== | ||
| − | * The catalyst requires regular cleaning or replacement due to the inhibiting effect of the layer of carbon that forms on it.<ref name=Crump /> | + | |
| − | * 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.<ref name=Crump /> | + | *The catalyst requires regular cleaning or replacement due to the inhibiting effect of the layer of carbon that forms on it.<ref name="Crump" /> |
| + | *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.<ref name="Crump" /> | ||
==See also== | ==See also== | ||
| − | * [[Sabatier process]] | + | |
| − | * [[Reverse Water-Gas Shift Reaction]] | + | *[[Sabatier process]] |
| − | * [[Charcoal]] | + | *[[Reverse Water-Gas Shift Reaction]] |
| + | *[[Charcoal]] | ||
==References== | ==References== | ||
Revision as of 07:29, 24 July 2019
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.[1]
Contents
Uses
- Preventing toxic carbon dioxide buildup in a spacecraft atmosphere[1].
- 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.[1]
- 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.[1]
