Exhaust catalyst system

A catalytic converter comprising:

• a housing having a plurality of chambers;
• and
• wherein:
• at least two chambers of the plurality of chambers are for processing an engine exhaust fluid;
• at least one chamber of the plurality of chambers is temporarily for being regenerated;
• and
• a plurality of valves positioned between the chambers, the valves configured to divert fluid flow from the chamber being regenerated such that it bypasses the chambers for processing exhaust fluid, wherein the valves are configured to direct a regeneration fluid through the chamber being regenerated in the same direction as the exhaust fluid flows through the chambers processing the exhaust fluid.

A method for attaining a regenerative catalyst system, comprising:

• providing a multi-unit catalyst system;
• connecting the system to an exhaust system so that at least one unit is not connected to the exhaust system;
• connecting the at least one unit to a source of gas to regenerate the at least one unit without reversing flow direction;
• and
• upon a partial or more regeneration of the at least one unit, exchanging the at least one unit with another at least one unit of the multi-unit catalyst system, for a partial or more regeneration of the another at least one unit.

Means for regenerating a catalyst, comprising:

• means for removing pollutants from an exhaust of an engine;
• and
• means for regenerating;
• and
• wherein:
• the means for removing pollutants is partitioned into a plurality of segments;
• at least one segment of the plurality of segments is connected to the means for regenerating;
• and
• the at least one segment is exchanged occasionally with another at least one segment from the plurality of segments;
• wherein flow through the regenerating segment is independent of and in the same direction as flow through remaining segments.

A regeneration system comprising:

• a unit having at least two catalyst segments;
• a mechanism for selecting out a segment from the unit for regeneration;
• sensors in the segments;
• a plurality of valves situated between the segments, the valves configured to divert flow for regeneration without reversing flow direction;
• and
• a controller connected to the sensors and to the mechanism for selecting out a segment.