Abstract: A reactor may have a catalyst bed for the catalytic treatment of a gas stream, with the catalyst bed extending substantially over a cross section of the reactor. Gas to be treated may axially fly through the catalyst bed. A carrier structure for the catalyst bed that is at least partly floatingly mounted in the reactor may include a sieve element and, radially outwardly, carrier elements fixedly joined to the reactor wall below the sieve element. The sieve element provides a resting surface for the catalyst bed. The sieve element terminates, radially outwardly, at a distance from the reactor wall. The carrier structure also includes support elements for the sieve element that are floatingly mounted in the reactor. An improved floating mounting is thus provided where not only the sieve element itself but also further parts of the carrier structure are mounted to prevent stresses due to thermal expansion.

Abstract: A tray for a mass-transfer column may allow contact between liquid and gas phases. The tray may comprises a tray inlet via which the tray is supplied with a liquid phase, a tray outlet via which the liquid phase flows out from the tray, first guide means for guiding the liquid phase where the first guide means forms a first flow path along which the liquid phase flows from the tray inlet to the tray outlet, an inlet for a temperature-control fluid, an outlet for the temperature-control fluid, and second guide means for guiding the temperature-control fluid for heat exchange with the liquid phase. The second guide means forms a second flow path that overlaps with the first flow path and leads from the inlet to the outlet. The temperature-control fluid flows along the second flow path in a direction opposite the flow direction of the liquid phase.

Abstract: A tray for a mass-transfer column permits contact between a liquid phase and a gas phase. The tray may comprise a tray feed via which the tray is charged with the liquid phase, a tray drain via which the liquid phase drains from the tray, and first guide means for guiding the liquid phase where the first guide means forms a first course path along which the liquid phase flows from the tray feed to the tray drain, enabling contact with the gas phase. A second guide means may form a second course path overlapping with the first course path, which leads from an inlet to an outlet. The first guide means may have at least two partial concentric paths. Temperature-control fluid may flow along the second course path in at least one of the at least two partial paths opposite the flow direction of the liquid phase.