ammonia 05When exhaust gas stream containing NH3 was combusted, NH3 and organic nitrogen compounds are oxidized. NOx and N2O are typically generated as by-products. It is well known that typical oxidation catalysts at low temperature (250 degC) can reduce NOx generation but possibly generate a large amount of N2O generation. (see Graph 1) N-U has developed NHN catalysts which treats NH3 and organic nitrogen gases effectively without any NH3 or other reducing agents injection and minimizes generation of NOx and N2O. (see Graph 2). It is workable for the treatment of high concentration of NH3 up to 1%. In the meanwhile, NHN catalyst does not contain any toxic substances.

Treating Gases

Ammonia, Hydrogen cyanide, Acrylonitrile, Other organic nitrogen compounds(DMF、NMP、Tri-methylamine、etc.)

Catalyst Specification

Catalyst Organic Nitrogen Destruction Catalyst, Ammonia Destruction Catalyst (NHN)
Shape Honeycomb Monolith
Cell Density 200 cells/inch2
Standard Size 150×150×50tmm
Standard SV 3,000~10,000 hr-1
Inlet Temperature 350~400 degC

Commercial References

Field of ApplicationGas compositionCommercial unit
NH3 stripper(Semiconductor manufacturing process) Ammonia more than 50 units
By-passed NH3 from DeNOx equipment Ammonia
Wastewater treatment Ammonia
Chemical industry Acrylonitrile
Coffee beans roasting Amino Acid
Synthetic fiber、Synthetic leather DMF
Electrodeposition coating Isocyanate
Li-Battery NMP

Performance Curve

Graph 1: NH3 Reaction by Typical Oxidation Catalyst

ammonia 01

Graph 2: NH3 Reaction by NHN Catalyst

ammonia 02

Contact Sales Department

Department Environmental Catalyst Div.
Contact Form
TEL 81-3-5436-8479
FAX 81-3-5436-8680

side products

side applications