Packing layer for a structured packing

1. A structured packing comprising

at least a first packing layer having first corrugations forming a plurality of open channels, said channels including a first corrugation valley, a first corrugation peak and a second corrugation peak, wherein said first corrugation peak and said second corrugation peak bound said first corrugation valley, said first corrugation peak having a first apex, said second corrugation peak having a second apex and said first corrugation valley having a valley bottom;

a spacer element extending in the direction of said first apex formed on said first apex of said first corrugation peak and having an edge which has a larger normal spacing from said valley bottom than said first apex from said valley bottom; and

a second packing layer disposed in contact with said spacer element and spaced from said first packing ,layer, said second packing layer having second corrugations disposed in cross-wise manner relative to said first corrugations of said first packing layer.

2. A structured packing in accordance with claim 1 further comprising a second spacer element arranged on said second apex.

3. A structured packing in accordance with claim 2 further comprising a third spacer element is arranged on said first valley bottom.

4. A structured packing in accordance with claim 1 further comprising a first marginal boundary along an upper edge of said first packing layer and a second marginal boundary parallel to said first marginal boundary and along a lower edge of said first packing layer.

5. A structured packing in accordance with claim 4 wherein said spacer element is arranged in the proximity of one of said first marginal boundary and said second marginal boundary.

6. A structured packing in accordance with claim 1 wherein the corrugation height of each of said first corrugations is constant.

7. A structured packing in accordance with claim 1 wherein at least a part of each respective apex is made as an edge.

8. A structured packing in accordance with claim 1 wherein said corrugation valley of at least one of said open channels is made in V shape.

9. A structured packing in accordance with claim 1 further comprising a plurality of said spacer elements disposed on said first packing layer and a plurality of said spacer elements disposed on said second packing layer.

10. A structured packing in accordance with claim 9 wherein said spacer elements of said first packing layer are in touching contact with said spacer elements of said second packing layer.

11. A structured packing in accordance with claim 9 wherein said spacer elements of said first packing element are arranged beneath said spacer elements of said second packing element relative to a vertical alignment of said first and said second packing layers.

12. A structured packing in accordance with claim 9 wherein said spacer elements of said first packing layer are disposed next to said spacer elements of said second packing layer.

13. A mass transfer apparatus comprising

a column; and

at least one structured packing in said column, said structured packing having at least a first packing layer having first corrugations forming a plurality of open channels, said channels including a first corrugation valley, a first corrugation peak and a second corrugation peak, wherein said first corrugation peak and said second corrugation peak bound said first corrugation valley, said first corrugation peak having a first apex, said second corrugation peak having a second apex and said first corrugation valley having a valley bottom; a spacer element extending in the direction of said first apex formed on said first apex of said first corrugation peak and having an edge which has a larger normal spacing from said valley bottom than said first apex from said valley bottom; and a second packing layer disposed in contact with said spacer element and spaced from said first packing layer, said second packing layer having second corrugations disposed in cross-wise manner relative to said first corrugations of said first packing layer.

14. A mass transfer apparatus as set forth in claim 13 wherein said column has a liquid inlet region for introducing an aqueous absorbent for wetting said corrugations of each of said first packing layer and said corrugations of said second packing layer with a descending film of the aqueous absorbent; and gas inlet region for passing an ascending flow of an exhaust gas containing CO 2 through said first packing layer and said second packing layer in mass exchange relation with said descending film for absorption of CO 2 into said aqueous absorbent from said film.

15. A structured packing comprising

a plurality of packing layers, each said packing layer being disposed in parallel spaced apart relation to an adjacent one of said plurality of packing layers and each said packing layer having a plurality of corrugations of equal height extending in criss-crossing relation to said corrugations of an adjacent packing layer; and

a plurality of spacer elements spacing said packing layers apart, each said spacer element being disposed between a respective corrugation of one of said packing layers and a corrugation of an adjacent packing layer of said plurality of packing layers.

16. A structured packing as set forth in claim 15 wherein at least some of said spacer elements are bars.