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US 9,181,888 B2Granted
Selectively trapping and storing SO3 in an exhaust gas effluent
AssigneeCummins Inc.
InventorsCary Henry, Aleksey Yezerets, Neal W. Currier
Life of this patent
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Abstract
Systems, apparatus, and methods for selectively, preferentially, and/or actively removing or trapping SO3 from un-oxidized sulfur constituents in an exhaust gas effluent produced by an internal combustion engine are disclosed. Also disclosed are embodiments for regenerating an SO3 trap.
Claims20
A method, comprising:
- producing an exhaust gas effluent from an internal combustion engine containing sulfur including a fraction of SO3 and a remaining portion of sulfur constituents;
- selectively trapping the fraction of SO3 produced by the internal combustion engine from the sulfur in the exhaust gas effluent upstream of a catalyzed aftertreatment component while limiting activity in oxidizing SO2 to SO3 in the remaining portion of the sulfur constituents so the fraction of SO3 that is trapped is smaller than the remaining portion of the un-oxidized sulfur constituents;
- and
- passing the remaining portion of the un-oxidized sulfur constituents to the catalyzed aftertreatment component.
1 more element
A system, comprising:
- an internal combustion engine utilizing at least one of a sulfur containing fuel and a sulfur containing lubricant to produce an exhaust gas effluent containing sulfur with a fraction of SO3 and a remaining portion of sulfur constituents;
- and
- an exhaust system operationally coupled to the internal combustion engine to receive the exhaust gas effluent, the exhaust system including a trap and a catalyzed aftertreatment component downstream of the trap, wherein the exhaust system is configured to transmit un-oxidized sulfur to the trap and the trap is configured to preferentially trap the fraction of SO3 produced by the internal combustion engine while providing limited activity in oxidizing SO2 to SO3 in the remaining portion of the sulfur constituents so the fraction of SO3 that is trapped is smaller than the remaining portion of the un-oxidized sulfur constituents and pass the remaining portion of the un-oxidized sulfur constituents to the catalyzed aftertreatment component.
A system, comprising:
- an internal combustion engine utilizing a sulfur containing fuel and operable to produce an exhaust gas effluent including sulfur constituents;
- a catalyzed aftertreatment component operationally coupled to the internal combustion engine to receive the exhaust gas effluent;
- and
- a trap that receives un-oxidized sulfur constituents in the exhaust gas effluent from the internal combustion engine, wherein the trap is configured to selectively remove an SO3 fraction produced by the internal combustion engine from the un-oxidized sulfur constituents of the exhaust gas effluent at a position upstream of the catalyzed aftertreatment component, limit activity in oxidizing SO2 to SO3 in the sulfur constituents so the SO3 fraction that is trapped is smaller than a remaining portion of the un-oxidized sulfur constituents, and pass the remaining portion of the un-oxidized sulfur constituents to the catalyzed aftertreatment component.
1 more element
Dependencies are inferred from the claim text.