Some of the carbon does get fully oxidized to carbon dioxide, and other reactions, such as the water-gas shift reaction also take place.
12.
The latter is relevant to exit gas stream composition of water gas shift reaction and steam reforming reactions ( reactions widely used for H 2 production ).
13.
More oxygen may be produced by running the water gas shift reaction in reverse, effectively extracting oxygen from the atmosphere by reducing carbon dioxide to carbon monoxide.
14.
A fourth solution to the stoichiometry problem would be to combine the Sabatier reaction with the reverse water gas-shift reaction in a single reactor as follows:
15.
These pathways begin with electrolysis of water to generate hydrogen, and then reducing carbon dioxide with excess hydrogen in variations of the reverse water gas shift reaction.
16.
These include hydride shift reactions such as the Wagner-Meerwein rearrangement, where a hydrogen, alkyl or aryl group migrates from one carbon to a neighboring carbon.
17.
Additional hydrogen can be recovered by a lower-temperature gas-shift reaction with the carbon monoxide produced, in the presence of a copper or iron catalyst.
18.
This change reduces the number of drying columns necessary, decreases formation of by-products, such as propionic acid, and suppresses the water gas shift reaction.
19.
The water-gas shift reaction may be an undesired side reaction in processes involving water and carbon monoxide, e . g . the rhodium-based Monsanto process.
20.
The most common catalysts used in the water-gas shift reaction are the high temperature shift ( HTS ) catalyst and the low temperature shift ( LTS ) catalyst.
