Systems methods for collecting an anaesthetic agent are described herein. The systems include at least one anaesthetic gas scavenging system (AGSS) for receiving exhaust gas from at least one source, the exhaust gas including the anaesthetic agent to be collected. Each AGSS comprises at least one power source for providing suction of the exhaust gas from the plurality of sources. The systems also include a collection system for recovering the anaesthetic agent from the exhaust gas. The collection system includes a compressor for compressing the exhaust gas from the AGSS to increase a pressure of the exhaust gas and at least one adsorbent tank configured to receive the compressed exhaust gas from the compressor and adsorb the anaesthetic agent from the compressed exhaust gas.

An emissions control system including a fluidized bed apparatus containing a reactive sorbent material is disclosed for gaseous and non-gaseous contaminated emissions. The reactive sorbent material may be CZTS, CZTS-Alloy, or a carbon-based sorbent material. The fluidized bed apparatus is configured with one or more closed loop sorbent recycling subsystems. The sorbent recycling subsystems include the capability to separate sorbents from each other, separate contaminates from sorbents for disposal and/or recycling, clean and/or rejuvenate sorbents for return to the fluidized bed apparatus, dispose of spent and exhausted sorbents, and replace the spent and exhausted sorbents with new sorbent to maintain consistent sorbent function in the fluidized bed apparatus. Monitoring sensors provide information useful in a method for establishing and maintaining consistent process parameter controls.

Some implementations can include a desiccant breather having an inner pipe having a top portion with a lip extending radially from the inner pipe, the inner pipe having a threaded portion and a top connector. The desiccant breather can also include an outer pipe having a diameter sufficient to accommodate the inner pipe, the outer pipe having a bottom connector and a cap. The desiccant breather can further include a desiccant breather body portion having a cavity configured to hold desiccant material. The lip of the inner pipe can have a diameter equal to or greater than a diameter of the outer pipe.

Provided is a wet desulfurization process using a suspension bed. The process comprises mixing desulfurization slurry with a hydrogen sulfide containing gas to obtain a first mixture, and passing the first mixture into a suspension bed reactor from bottom to top, with controlling the first mixture to have a dwell time of 5-60 minutes in the reactor to allow they contact and react sufficiently with each other; and subjecting a second mixture obtained from the reaction to gas liquid separation to produce a purified gas. The process of the present invention may reduce the hydrogen sulfide content in the hydrogen sulfide containing gas from 2.4-140 g/Nm.sup.3 to 50 ppm or less, so that the desulfurization efficiency is 98% or more. The process of the present invention is simple and reasonable, with high desulfurization and regeneration efficiency, simple equipment, little occupation of land and low investment, which is very suitable for industrial promotion.

Certain embodiments of the invention relate to a method and facility for purifying a high-flow gas stream by absorption, the purification facility comprising at least one absorber having a parallelepipedal enclosure arranged horizontally and comprising: a gas stream inlet and outlet, two fixed-bed absorbent masses each having a likewise parallelepipedal shape, the surfaces of which are parallel to the surfaces of the enclosure, and a set of volumes allowing the traversing of the two absorbent masses by the gas streams, in parallel but opposite directions, the traversing occurring horizontally over the entire cross-section of each of the absorbent masses and over their entire thicknesses.

Systems and methods of direct air capture are described. Systems include a plurality of moving adsorber panels in a linear direction (or circular configuration) and one or more fans configured to move air across the adsorber panels; such adsorber panels may be oriented vertically or horizontally, relative to the ground. Systems may include an independent regeneration box that comprises a system of headers, ducts and valves configured to deliver and remove a plurality of gases to the regeneration box. The regeneration box contains multiple chambers such that steps such as oxygen removal and panel cooling may be performed independently from and simultaneously to thermal preheating and desorption of the CO.sub.2 on the panels. The desorption panels may be configured to achieve counter-current flow to the hot gases used for thermal preheating and desorption. A multi-stage heat pump may facilitate reuse of waste heat and decarbonization of the process heating requirements.

Disclosed is a method for running natural gas powered stationary combustion systems, such as an internal combustion engine, a furnace, a fired heater, a power plant, an incinerator, and the like. In one embodiment of the present method, ethane and heavier hydrocarbons or propane and heavier hydrocarbons (29) are removed (90) from a natural gas feedstream (3) to provide the methane-rich natural gas stream (5) used to fuel the stationary combustion system (100). One embodiment of this method provides for the use of a regenerable adsorbent media to remove the higher hydrocarbons which is regenerated by a microwave heating system. Said regeneration step may be operated as a batch process, a semi-continuous process, or a continuous process.

The present disclosure is directed to adsorption devices for use in substance detection systems and methods of using same. In particular, the present disclosure is directed to adsorption devices that allow for both the optional refilling of adsorption material and the optional regeneration of a dryer.

A gas dryer of the invention, being a heaterless type of gas dryer that carries out dehumidifying of hydrogen gas circulating in an interior of a rotating electrical machine, includes a drying tower that causes moisture in the hydrogen gas to adsorb to a desiccant, and a funnel-form desiccant holding portion disposed in an interior of the drying tower and holding the desiccant, wherein the desiccant is introduced into the desiccant holding portion from an input valve of an upper portion of the drying tower, and moist desiccant is discharged from a discharge valve of a lower portion of the drying tower. The desiccant holding portion is configured of perforated metal, or the like, having ventilation, and is used as a partitioning plate that partitions the interior of the drying tower.

A process is provided to remove impurities including water, mercaptans, carbonyl sulfide and hydrogen sulfide from hydrocarbon streams containing from 100 to 900 ppm light olefins. In the process, a compound bed containing multiple layers of molecular sieves is used to remove the specific impurities. In situations when the regeneration gas may contain sulfur compounds, a sulfur guard bed may be used to treat the regeneration gas prior to regenerating the compound adsorbent bed.