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US 11,028,749 B2Granted
Hydrogen reductant for catalytic pollution abatement
AssigneeBASF SE
InventorsShiang Sung, Saeed Alerasool
Life of this patent
Estimating the term…
Abstract
Systems for abatement of pollutants in an exhaust gas stream of an internal combustion engine including a hydrogen injection article configured to introduce hydrogen upstream of a catalytic article are effective for the abatement of carbon monoxide and/or hydrocarbons and/or nitrogen oxides. The introduction of hydrogen may be intermittent and/or during a cold-start period.
Claims16
A system for abatement of pollutants in an exhaust gas stream of an internal combustion engine, the system comprising:
- a catalytic article downstream of and in fluid communication with the internal combustion engine;
- a hydrogen generation system comprising an ammonia decomposition article configured to generate hydrogen, the ammonia decomposition article comprising an ammonia/organic solvent reservoir or an ammonia storage tank, and a catalytic reactor configured to collect hydrogen from ammonia;
- a hydrogen injection article in fluid communication with the catalytic article and with the exhaust gas stream of the internal combustion engine and configured to introduce hydrogen into the exhaust gas stream upstream of the catalytic article;
- and
- optionally, a hydrogen storage article.
2 more elements
A method for abatement of pollutants in an exhaust gas stream of an internal combustion engine, the method comprising:
- isolating ammonia from an ammonia/organic solvent solution or releasing ammonia from an ammonia storage tank;
- decomposing ammonia in a catalytic reactor to provide hydrogen;
- collecting the hydrogen;
- storing the hydrogen;
- and
- introducing stored hydrogen via a hydrogen injection article into the exhaust gas stream downstream from the internal combustion engine and upstream of a catalytic article.
3 more elements
Dependencies are inferred from the claim text.