Selectively trapping and storing SO₃in an exhaust gas effluent

摘要

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.

主权项

1. 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.