A catalyst arrangement disposed within a vertical reaction tube includes a structured catalyst within an upper part of the reaction tube, a particulate catalyst beneath the structured catalyst in a lower part of the reaction tube, and a catalyst support device located between the structured catalyst and the particulate catalyst, wherein the catalyst support device includes a cylindrical body having a first end adapted for connection to the structured catalyst, and a second end, and the cylindrical body has a diameter 70-90% of the internal diameter of the tube and a length/diameter in the range 0.5-2.5.

A sparging evaporator for an inerting system including an outer vessel, an inner vessel within the outer vessel, and a plenum formed between the inner and outer vessels. The outer vessel includes a gas inlet for receiving inlet gas into the plenum, and a liquid inlet for receiving liquid fuel into the plenum. The inlet gas in the plenum generates a gas pressure that is exerted against a free surface of the liquid fuel in the plenum thereby forcing the liquid fuel and the inlet gas through an inlet of the inner vessel. The inner vessel contains a lattice structure that promotes liberation of fuel vapor from the liquid fuel and enables the inlet gas in the liquid fuel to sparge the fuel vapor in the liquid fuel, thereby forming a fuel-enriched gas mixture that can be fed to a reactor of the inerting system.

In one embodiment, a honeycomb structure formed from ceramic material, or ceramic honeycomb structure, includes at least one outer wall defining a perimeter of the honeycomb structure. A plurality of primary zone partitions and secondary zone partitions may extend in an axial direction of the honeycomb structure and across a width of the honeycomb structure. The primary zone partitions and the secondary zone partitions intersect with one another to divide a radial cross section of the honeycomb structure into a plurality of zones. The primary zone partitions and the secondary zone partitions may have a single-wall thickness with a maximum thickness T.sub.zmax. Each zone may comprise a plurality of channel walls intersecting to subdivide the zone into a plurality of through channels extending in the axial direction of the honeycomb structure, the plurality of channel walls within each zone having a thickness of at least tc and T.sub.Zmax>2t.sub.C.

A method of fabricating a catalytic reactor assembly having an outer tube and an inner tube is provided. The method may include inserting a catalyst into the outer tube and inserting the inner tube through the catalyst. The method may further include radially expanding the inner tube against the catalyst.

A photocatalytic system for reducing airborne contaminants using an ultraviolet (UV) emitter and photocatalytic cells, the system comprises a housing comprising a front side having an opening therethrough, and a rear side opposite the front side, the rear side also having an opening therethrough. A first photocatalytic cell is located in the housing adjacent to the front side. Likewise, a second photocatalytic cell located in the housing adjacent to the rear side. A unitary removable structure slidably positionable within the housing between the first photocatalytic cell and the second photocatalytic cell.

A spacer array including a plurality of spacers. Each spacer defines a longitudinal axis and includes a main body, a leading pin, and a trailing pin. The main body has a main body cross-sectional dimension. The leading pin extends from the main body and is upstream of the main body. The leading pin has a leading pin cross-sectional dimension. The trailing pin extends from the main body and is downstream of the main body. The trailing pin has a trailing pin cross-sectional dimension. The main body cross-sectional dimension is greater than the leading pin cross-sectional dimension and the trailing pin cross-sectional dimension.

A contactor media includes continuous surface segments, wherein a first continuous surface segment has at least 50% of its surface area follow at least one of: (a) a contour of a first zero-thickness surface having a Gaussian curvature (G.sub.c) of 400 mm.sup.2G.sub.c<0.01 mm.sup.2; and (b) a contour of a second zero-thickness surface having at least one principal curvature (k.sub.i) of 20 mm.sup.1k.sub.i<0.1 mm.sup.1; and wherein the first continuous surface segment provides at least: (a) a total liquid hold-up of between about 1 kg/m.sup.3 to about 800 kg/m.sup.3 or (b) a static liquid hold-up of about 0.1 kg/m.sup.3 to about 800 kg/m.sup.3.