There is provided a structurally stable monolith substrate, suitable to provide carbon dioxide capture structure for removing carbon dioxide from air, having two major opposed surfaces, and further having a plurality of longitudinal channels extending between and opening through the two major opposed surfaces of the structurally stable monolith substrate; and a macroporous coating, adhered to the interior wall surfaces of the longitudinal channels, comprising an adherent, coating formed of cohered, compact mesoporous particles each being formed of a material that is compatible with the material forming the underlying substrate structure so as to become adherent thereto when coated. The mesoporous particles are capable of supporting in their mesopores a sorbent for CO.sub.2 There is also provided a method for forming the monolith and a system for utilizing the monolith as part of a CO.sub.2 capture structure, within the system, to remove CO.sub.2 from the atmosphere.

A process for removal of unwanted components from a feed gas mixture, wherein a temperature swing adsorption unit comprising at least two adsorption vessels is used, the method comprising cyclically operating the temperature swing adsorption unit in successive operation modes in each of which a different one of the at least two adsorption vessels is operated in an adsorption mode while a further one of the at least two adsorption vessels previously operated in the adsorption mode is operated in a regeneration mode, the adsorption mode comprising forming an adsorption gas stream using a part of the feed gas mixture and passing the adsorption gas stream through the adsorption vessel operated in the adsorption mode, and the regeneration mode comprising passing a regeneration gas stream through the adsorption vessel operated in the regeneration mode, thereby forming the purified gas mixture.

The present disclosure provides a macroporous noble metal catalyst and processes employing such catalysts for the regeneration of deactivated ionic liquid catalyst containing conjunct polymer.

A capture mass for heavy metals, in particular mercury, contained in a gaseous or liquid feed, said mass comprising: copper which is present at least in part in the sulphide form, Cu.sub.xS.sub.y, a porous support based on alumina; characterized in that said porous support has a total pore volume (TPV) in the range 0.8 to 1.5 cm.sup.3/g, a mesopore volume (V.sub.6 nm-100 nm) in the range 0.5 to 1.3 cm.sup.3/g, and a macropore volume (V.sub.100 nm) in the range 0.33 to 0.45 cm.sup.3/g, it being understood that the ratio between the mesopore volume and the macropore volume (V.sub.6 nm-100 nm/V.sub.100 nm) is in the range 1 to 5.

An adsorptive separation apparatus comprises an upper air pipe, a lower air pipe, an adsorption pipe assembly located between the upper air pipe and the lower air pipe, an oil-water separation seat located at an end of the lower air pipe, and an oil-water separator arranged in the oil-water separation seat. An inner cavity is formed in the oil-water separation seat, and an air intake port is provided on the outer side surface of the oil-water separation seat. The inner cavity is in communication with the air intake port and the lower air pipe. The oil-water separator is located in the inner cavity. The oil-water separator comprises a separator housing and multiple layers of wire meshes filled inside the separator housing. Multiple through holes are formed on the separator housing.

A method for controlling two contaminants in a gas stream, comprising a system with two adsorption vessels, and analyzers for determining the concentration of the two contaminants is provided. The method includes purifying a gas stream with a first vessel placed in an adsorption mode and placing a second vessel in a standby mode. Then opening a second purge valve on the second vessel if the concentration of either contaminant is equal to or greater than predetermined threshold levels, thereby allowing a first portion of the purified gas exiting the first vessel to flow through the second vessel and exiting through the second purge valve. Then closing the second purge valve after a predetermined period of time when the concentration of both contaminants are less than or equal to a predetermined threshold level. Then switching the vessels and repeating the process.

In some embodiments, an indoor air cleaning apparatus and a method for removing at least a portion of at least one type of gas from an indoor airflow are disclosed. The apparatus may comprise a cabinet; at least one sorbent bank comprising at least one cartridge; a fan assembly comprising at least one housing including at least one housing inlet and at least one housing outlet, at least one motor and at least one impeller; and a heating element configured to operate in at least one of two modes: an active mode and an inactive mode; and a controller configured to operate in at least two modes: an adsorption mode and a regeneration mode.

A process for altering the composition of a feed gas containing H.sub.2S equivalents is disclosed. The process comprises (a) contacting the feed gas with a solid adsorbent at a temperature of 250-500° C., to obtain a loaded adsorbent, (b) purging the loaded adsorbent with a purge gas comprising steam, thus producing a product stream which typically contains substantially equal levels of CO.sub.2 and H.sub.2S. The process further comprises a step (c) of regenerating the purged adsorbent by removal of water. The adsorbent comprises alumina and one or more alkali metals, such as potassium oxides, hydroxide or the like.

The invention relates to a process for the regeneration of an adsorber. For the regeneration a liquid stream (S2) comprising at least one alkane is converted from liquid phase into gaseous phase. Then the adsorber is regenerated and heated by contact with gaseous stream (S2) up to 230 to 270° C. Subsequently, the adsorber is cooled first by contact with gaseous stream (S2) to a temperature of 90 to 150° C. followed by cooling with liquid stream (S2) to a temperature below 80° C. The outflow of the adsorber (S2*) during the cooling with gaseous stream (S2) and optionally the outflow of the adsorber (S2*) during cooling with liquid stream (S2) is recycled in at least one of these steps.

Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit may provide access to the adsorbent material within the adsorbent bed unit without having to remove one or more of valves, conduits and manifolds.