Combination partial flow particulate filter and catalyst

Abstract

The present disclosure is directed to a filtering element. The filtering element may comprise at least one channel defined by at least one wall. The at least one wall extends longitudinally from a first end of the channel to a second end of the channel, the at least one channel having an unobstructed first end and an unobstructed second end. The filtering element further includes at least one partial barrier configured to reduce a path of a flow of exhaust through the at least one channel, the at least one partial barrier being positioned within the at least one channel so as to redirect a portion of the exhaust flow within the channel. The at least one channel includes a selective catalytic reduction catalyst on at least a portion of one of a surface of the at least one partial barrier or a surface of the at least one wall.

1 . A filtering element, comprising:
 at least one channel being defined by at least one wall extending longitudinally from a first end of the channel to a second end of the channel, the at least one channel having an unobstructed first end and an unobstructed second end;   at least one partial barrier configured to reduce a path of a flow of exhaust through the at least one channel, the at least one partial barrier being positioned within the at least one channel so as to redirect a portion of the exhaust flow around the partial barrier within the channel; and   wherein the at least one channel includes a selective catalytic reduction catalyst on at least a portion of one of a surface of the at least one partial barrier or a surface of the at least one wall.   
   
   
       2 . The filtering element of  claim 1 , wherein the at least one wall is a non-porous material. 
   
   
       3 . The filtering element of  claim 2 , wherein the non-porous material is metal. 
   
   
       4 . The filtering element of  claim 1 , wherein the at least one channel includes at least two channels and wherein the at least two channels are in fluid communication with each other through at least one opening in the at least one wall. 
   
   
       5 . The filtering element of  claim 4 , wherein the at least one opening includes a plurality of openings. 
   
   
       6 . The filtering element of  claim 1 , wherein the partial barrier is perpendicular with the at least one wall. 
   
   
       7 . A method of filtering an exhaust gas, comprising:
 directing a flow of exhaust gas through at least one channel extending between a first unobstructed end and a second unobstructed end of a diesel particulate filter;   redirecting a portion of the flow of exhaust gas around at least one partial barrier within the channel;   selectively reducing a non-particulate pollutant level in the exhaust gas through contact between the flow of exhaust gas and a catalyst within the diesel particulate filter; and   trapping particulate matter of the exhaust gas within the at least one channel.   
   
   
       8 . The method of  claim 7 , including creating turbulence within the flow of exhaust gas by the redirecting of a portion of the flow. 
   
   
       9 . The method of  claim 7 , wherein the redirecting of a portion of the flow of exhaust gas further includes redirecting the flow of exhaust gas with at least one non-porous wall of the at least one channel. 
   
   
       10 . The method of  claim 7 ,.wherein trapping particulate matter includes redirecting a portion of the flow of exhaust gas through at least one porous wall of the at least one channel. 
   
   
       11 . The method of  claim 7 , wherein the at least one channel includes at least two channels and the method further includes directing the flow of exhaust gas from a first of the at least two channels into a second of the at least two channels through at least one wall between the channels. 
   
   
       12 . The method of  claim 7 , wherein selectively reducing a non-particulate pollutant level includes facilitating reaction of the non-particulate pollutant level with a catalyst disposed on at least one of a wall of the channel and the partial barrier. 
   
   
       13 . The method of  claim 12 , wherein the facilitating reaction includes injecting a reductant into the exhaust flow. 
   
   
       14 . A filter, comprising:
 a housing having an inlet and an outlet; and   a filtering element, the filtering element including:
 at least one channel defined by at least one wall extending longitudinally between first and second ends, the first and second ends being unobstructed; 
 at least one partial barrier extending from the at least one wall and configured to redirect a path of a flow of exhaust through the at least one channel; and 
 a selective catalytic reduction catalyst on at least a portion of one of a surface of the at least one partial barrier or a surface of the at least one wall. 
   
   
   
       15 . The filter of  claim 14 , wherein the at least one wall is a non-porous material. 
   
   
       16 . The filter of  claim 15 , wherein the non-porous material is metal. 
   
   
       17 . The filter of  claim 14 , wherein the at least one channel includes at least two channels, the at least two channels being in fluid communication with one another through at least one opening in the at least one wall. 
   
   
       18 . The filter of  claim 17 , wherein the at least one wall includes a plurality of openings, the openings configured to allow a flow of fluid from on of the least two channels into a second of the at least two channels. 
   
   
       19 . The filter of  claim 14 , wherein the at least one partial barrier includes a plurality of partial barriers. 
   
   
       20 . The filter of  claim 14 , wherein the at least one partial barrier is configured to collect particulate matter from the flow of exhaust as the flow of exhaust gas passes through the at least one channel.