METHOD FOR THE REDUCTION OF NITROGEN OXIDES

PURPOSE: Specific catalyst is used to reduce NOx which is generated from internal combustion engine. Thereby, the discharging amount of NOx from vehicles can be decreased. CONSTITUTION: For the reduction of NOx, in particular in burner gases, a catalyst is used consisting of: (a) 20-97 wt.% Al2O3, (...

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Bibliographische Detailangaben
Hauptverfasser:	ROITZHEIM ROLF-DIRC, WALZ LEONHARD, SEIBOLD ANDREA, HARTWEG MARTIN, FETZNER THOMAS, MORSBACH BERND, KUMBERGER OTTO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE: Specific catalyst is used to reduce NOx which is generated from internal combustion engine. Thereby, the discharging amount of NOx from vehicles can be decreased. CONSTITUTION: For the reduction of NOx, in particular in burner gases, a catalyst is used consisting of: (a) 20-97 wt.% Al2O3, (b) 1-40 wt.% CuO, (c) 1-50 wt.% ZnO, (d) 1-40 wt.% Ag, (e) 0-2 wt.% Pt, (f) 0-20 wt.% oxides of rare earth metals, elements of the third subgroup of the periodic system or their mixtures, with relation to the total weight of components (a) to (e), which is 100 wt.% In this catalyst, up to half the weight of component (a) can be replaced by FE2O3, Cr2O3, Ga2O3 or their mixtures; up to half the weight of component (b) can be replaced by CoO; up to half the weight of component (c) can be replaced by MgO; up to half the weight of component (d) can be replaced by Au, and up to half the weight of component (e) can be replaced by Pd, Ru, Os, Ir, Rh, Re or their mixtures. Components (a), (b) and (c) form a spinel which can be doped with the components (d), (e) and (f).