| 摘要 |
Catalyst support elements are shaped to provide large surface area per unit of volume (porosity), while providing high packing density. Generally, the elements are characterized by more than six faces of identical size and shape, and by members extending outwardly in three dimensions. Each element includes a plurality of concave regions defined by the intersection of various of their planar surfaces, yet the element is not simply a section of an extrusion. An exemplary such element is the Reticulon (41), which has the shape of two diametrically opposed, truncated obelisks extending from two opposing faces of an octagonal base column. Five-sided pyramids of equal size and proportion extend from distal ends of the truncated obelisks, as well as from those alternating faces of the octagonal base column which coincide with the faces of the obelisks. Aggregates for reinforcing structural matrices can also be formed according to such geometries. Known fabrication methods and apparatuses, including patterned pinch rollers, molds, etc., are adapted to create such articles. In certain embodiments, vibrational energy (e.g. ultrasonic or microwave energy) is utilized to aid in article formation. |
