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- Title
Liquid-Phase Catalytic Decomposition of Novel Ammonia Precursor Solutions for the Selective Catalytic Reduction of NO.
- Authors
Peitz, Daniel; Bernhard, Andreas; Elsener, Martin; Kröcher, Oliver
- Abstract
Aqueous solutions of NH-precursor compounds (i.e. urea and methanamide) were catalytically hydrolyzed in the liquid phase by applying a pressure of 50 bar during contact with the catalyst in a heated tube. Methanamide could be hydrolyzed on an Au/TiO catalyst to yield not only NH, but also H. Decomposition of urea under high pressure in the liquid phase could even be achieved without the addition of a catalyst. Due to the large excess of water present during decomposition, side products could be avoided. As the reactor tube is electrically heated, the presented method provides a possibility to reliably transform NH-precursor compounds into gaseous NH independent of the engine exhaust gas temperature. The NH-flow can be added to the main exhaust duct to enable the selective catalytic reduction of NO at the light-off of the SCR catalyst.
- Subjects
LIQUID phase epitaxy; CHEMICAL decomposition; AMMONIA; CHEMICAL precursors; SELECTIVE catalytic oxidation; NITRIC oxide reduction; AQUEOUS solutions; HYDROLYSIS
- Publication
Topics in Catalysis, 2013, Vol 56, Issue 1-8, p19
- ISSN
1022-5528
- Publication type
Article
- DOI
10.1007/s11244-013-9922-7