Ammonium Carbamate → Ammonia

HRID 2222996Notes

Reaction equation

HRID 2222996 reaction equation
[N:1]#N.N#N.N.N.[C:7](=[O:10])([O-:9])[NH2:8].[NH4+]>N>[C:7](=[O:9])([O-:10])[NH2:8].[NH4+:1].[C:7](=[O:10])=[O:9].[NH3:8]

Participants

7

Reactant 3

HCID 517232Ammonium CarbamateHCID 6857397HCID 6857397, compoundHCID 131726871HCID 131726871, compound

Product 3

HCID 222AmmoniaHCID 280Carbon DioxideHCID 517232Ammonium Carbamate

Reagents, catalysts & solvents 1

HCID 222AmmoniaSolvent

Procedure

SCR catalytic converter 12 situated in exhaust-gas region 11 of internal combustion engine 10 reduces the nitrogen oxides NO and NO2 contained in the exhaust gas of internal combustion engine 10 to nitrogen N2 SCR catalytic converter 12 requires ammonia NH3 for the reduction. The ammonia is prepared in ammonia source 19, which performs a thermal decomposition of ammonium carbamate for example. In the thermolysis of ammonium carbamate in a thermolysis reactor, CO2 is produced in addition to NH3. Only NH3 will be used in the following to designate the product gas stream of ammonia source 19. Another implementation option of ammonia source 19 provides for the ammonia to be desorbed from a storage material (e.g. a metal chloride) while the storage material is being heated. In addition it is possible that ammonia source 19 takes the form of an ammonia synthesis device.

Sources & evidence

ORD record
ord-4e7911a8c2f546c4af38170a25c4c40d
Source dataset
uspto-grants-2008_05
Patent number
US07373775B2

Reaction notes

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