Thyssen Krupp Ag

Thyssenkrupp Industrial Solutions Ag

Thyssenkrupp Uhde Gmbh

Jens Mathiak

Michael Groves

Peter Banik

A process for catalytic oxidation of ammonia gas by way of an oxygen-containing gas in a presence of a noble metal-containing catalyst may be employed to give nitrogen monoxide. A temperature of an ammonia/air mixed gas may be optimized in respect of nitrogen monoxide selectivity of the reaction before contact with the catalyst. Examination of catalytic NHoxidation according to 4NH+5O&#x2192;4NO+6HO revealed that an optimum mode of operation of an NHburner in an HNOplant is not to be achieved by maintenance of a constant gauze temperature of the catalyst gauze by automatic setting of the NH:air ratio. Rather, there is an optimum temperature for each process condition that should be set not by changing the NH:air ratio but instead by altering the temperature of the NH/air mixed gas before contact with the catalyst gauzes.

Method for the catalytic oxidation of ammonia gas

A device for producing granules that include ammonium sulfate may include a mixing device, an atomizing device and a fluidized bed. The mixing device may be utilized to produce a composition comprising ammonium sulfate and aluminum sulfate. The atomizing device may be disposed downstream of the mixing device and may be utilized to atomize the composition produced in the mixing device. The fluidized bed may also be disposed downstream of the mixing device. The fluidized bed may be utilized for producing the granules. Further, with respect to a process for producing granules comprising ammonium sulfate, a step of granulating a composition comprising ammonium sulfate and aluminum sulfate may involve providing ammonium sulfate-containing nuclei, fluidizing the ammonium sulfate-containing nuclei, and atomizing the composition onto the nuclei.

Growing community of inventors

Castrop-Rauxel, Germany

Jens Mathiak