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AssigneeIfp Energies Nouvelles
InventorsSerge Gonzalez, David Pasquier, Jacques Vallet
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The invention relates to a fluid suited for depollution of exhaust gas, notably in internal-combustion engines, allowing both to perform catalytic reduction of the nitrogen oxides (DeNOx) contained in the exhaust gas and to provide particulate filter (PAF) regeneration aid. The fluid is a homogeneous aqueous solution of a reductant or a reductant precursor for the DeNOx process, and it comprises a metallic additive for catalyzing the oxidation of exhaust gas particles. This metallic additive is a basic metal carbonate soluble in said aqueous solution. The invention also describes the preparation method and the use thereof for the depollution of exhaust gas of internal-combustion engines.
A fluid for depollution of exhaust gas, notably from internal-combustion engines, the fluid comprising a homogeneous aqueous solution of at least one reductant or reductant precursor for elimination of nitrogen oxides NOx contained in the exhaust gas, the at least one reductant or reductant precursor comprising urea in solution in pure water, the aqueous solution further comprising a metallic additive for catalyzing the oxidation of exhaust gas particles in a particulate filter, the metallic additive being a basic metal carbonate soluble in the aqueous solution.
Dependencies are inferred from the claim text.