Structured packing

A structured packing sheet comprising:

• opposite faces;
• an upper edge and a lower edge;
• a lower edge region that is adjacent the lower edge;
• a bulk region above the lower edge region;
• a plurality of apertures that extend through the structured packing sheet;
• corrugations formed of alternating peaks and valleys that are interconnected by corrugation sidewalls and extend in an inclined direction that forms an inclination angle in relation to the upper edge and/or the lower edge of the structured packing sheet;
• a curve formed in the geometry of the corrugations in the lower edge region such that an inclination angle of the corrugations in relation to the lower edge gradually increases from the bulk region through the lower edge region;
• and
• surface texturing on the opposite faces comprising:
• a grid of indented and raised structures with each indented structure being separated from some or all of adjacent ones of the indented structures by the raised structures, the raised structures forming rows of peaks and interconnecting saddles;
• and microchannels that extend along adjacent ones of the indented structures and the interconnecting saddles that are positioned between each of the adjacent ones of the indented structures.

A structured packing sheet comprising:

• opposite faces;
• an upper edge and a lower edge;
• a lower edge region that is adjacent the lower edge, wherein the lower edge region spans 25 to 45 percent of a distance from the lower edge to the upper edge of the structured packing sheet;
• a bulk region above the lower edge region;
• a plurality of apertures that extend through the structured packing sheet;
• corrugations formed of alternating peaks and valleys that are interconnected by corrugation sidewalls and extend in an inclined direction that forms an inclination angle in relation to the upper edge and/or the lower edge of the structured packing sheet;
• a curve formed in the geometry of the corrugations in the lower edge region such that an inclination angle of the corrugations in relation to the lower edge gradually increases from the bulk region through the lower edge region with the inclination angle at the lower edge being in the range of 65 to 90 degrees;
• and
• surface texturing on the opposite faces comprising:
• a grid of indented and raised structures with each indented structure being separated from some or all of adjacent ones of the indented structures by the raised structures, the raised structures forming rows of peaks and interconnecting saddles;
• and microchannels that extend along adjacent ones of the indented structures and the interconnecting saddles that are positioned between each of the adjacent ones of the indented structures, wherein the indented structures are arranged in parallel rows with the interconnecting saddles of the raised structures connecting adjacent indented structures within each row.