NOx reduction system for diesel engines, using hydrogen selective catalytic reduction
AssigneeSouthwest Research Institute
InventorsGordon James Johnston Bartley, Christopher Alan Sharp
Life of this patent
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Abstract
An emission control system for reducing NOx in the exhaust of a diesel engine. A partial oxidation system receives diesel fuel from the engine's fuel tank and partially oxidizes the diesel fuel into hydrogen. The hydrogen is then introduced into the main exhaust line and the hydrogen-enhanced exhaust is delivered to a hydrogen selective catalytic reduction unit, which uses the hydrogen to convert the NOx to nitrogen.
Claims18
A method of treating the NOx emissions from a diesel engine having a main fuel line that carries diesel fuel to the engine and a main exhaust line that carries exhaust from the engine, the method comprising the steps of:
- mixing a portion of diesel fuel from the main fuel line with air;
- receiving the mixed portion of diesel fuel and air into a partial oxidation unit;
- using the partial oxidation unit to partially oxidize the portion of diesel fuel into a gas mixture containing hydrogen;
- delivering the gas mixture to the main exhaust line;
- placing a hydrogen selective catalytic reduction unit in line on the main exhaust line, such that the hydrogen selective unit receives the exhaust and the gas mixture;
- and;
- using the hydrogen selective catalytic reduction unit to convert the NOx emissions into nitrogen.
A method of treating the NOx emissions from a diesel engine having a main fuel line that carries diesel fuel to the engine and a main exhaust line that carries exhaust from the engine, the method comprising the steps of:
- receiving a portion of diesel fuel from the main fuel line into a partial oxidation unit;
- receiving a portion of the exhaust from the main exhaust line into the partial oxidation unit;
- using the partial oxidation unit to partially oxidize the portion of diesel fuel into a gas mixture containing hydrogen;
- delivering the gas mixture to the main exhaust line;
- placing a hydrogen selective catalytic reduction unit in line on the main exhaust line, such that the hydrogen selective unit receives the exhaust and the gas mixture;
- and
- using the hydrogen selective catalytic reduction unit to convert the NOx emissions into nitrogen.
Dependencies are inferred from the claim text.