The method may include providing {TAIL ~ a reactor} having catalytic material in or on the inner surfaces of {HEAD ~ the first plurality} of cells 
The method may include providing { TAIL ~ a reactor } having catalytic material in or on the inner surfaces of { HEAD ~ the first plurality } of cells
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH