Process for N.sub.2 O decomposition

Details Process for N.sub.2 O decomposition Process for N.sub.2 O decomposition

1992-04-01

1993-04-06

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

B01J 800, C01B 2100

Patent

active

052001628

ABSTRACT:
The exothermicity attending decomposition of N.sub.2 O to nitrogen and oxygen can lead to a multiplicity of process difficulties associated with high process temperatures. An improved process is one where a portion of the exit gases, depleted in N.sub.2 O, is first cooled and then recycle to the N.sub.2 O-decomposition zone. The process is amenable to process control to afford a very stable process largely independent on the particular catalyst used for N.sub.2 O decomposition. Where the N.sub.2 O-containing waste gas stream also contains NO.sub.x, if it often highly desirable to pretreat the stream to remove NO.sub.x prior to the N.sub.2 O-decomposition zone.

REFERENCES:
patent: 4571329 (1986-02-01), Kato et al.
patent: 4877743 (1989-10-01), Waugh et al.
patent: 4933158 (1990-06-01), Aritsuka et al.
patent: 5043150 (1991-08-01), Hiltunen et al.

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