Ammonia catalytic abatement apparatus and method
US6299847A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1999 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Jun 29, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An ammonia catalytic abatement apparatus and method having two types of catalytic converters in line, wherein the first catalytic converter preferably including platinum as the catalytic agent converts or reduces the ammonia in an ammonia laden gas stream to N.sub.2, H.sub.2 O and approximately equal stoichiometric proportions of NO.sub.x and the remaining unconverted NH.sub.3. The second catalytic converter which preferably is a selective catalytic reduction (SCR) catalyst then converts substantially all of the NO.sub.x +NH.sub.3 to N.sub.2 +H.sub.2 O vapor. The ammonia laden gas stream is first heated to the reaction temperatures of the catalytic converters which in the disclosed embodiment is about 300.degree. C. The disclosed apparatus further includes a recuperative heat exchanger which preheats the gas prior to the heating element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.