The method includes providing a reactor that comprises at least a first multicellular extruded body oriented with its cells extending in parallel in a vertically downward direction from {HEAD ~ a first end} of {TAIL ~ the body} to a second end 
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The method includes providing a reactor that comprises at least a first multicellular extruded body oriented with its cells extending in parallel in a vertically downward direction from { HEAD ~ a first end } of { TAIL ~ the body } to a second end
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH