An apparatus comprising (A) an atmospheric water extraction unit; and (B) a direct air capture unit positioned downstream of and in communication with the atmospheric water extraction unit, wherein the apparatus is capable of reversibly operating in (i) adsorption mode to adsorb water and CO.sub.2 from an incoming air stream and (ii) regeneration mode to release adsorbed water and CO.sub.2, wherein the atmospheric water extraction unit comprises a first desiccant bed comprising a sorbent that adsorbs water from an incoming air stream during adsorption mode and releases water during regeneration mode, and wherein the direct air capture unit comprises a first CO.sub.2 sorbent bed that adsorbs CO.sub.2 from an air stream during adsorption mode and releases CO.sub.2 during regeneration.

Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve performing dampening for fluctuations in the streams conducted away from the adsorbent bed unit. The process may be utilized for swing adsorption processes, such as rapid cycle TSA and/or rapid cycle PSA, which are utilized to remove one or more contaminants from a gaseous feed stream.

A device for mass and/or heat transfer includes a mass and/or heat transfer (MHX) plate having a thickness in a range from 0.5 mm to 5 mm and including a supporting matrix that is thermally conductive, and a functional material in the supporting matrix, wherein a volume fraction of the functional material in the MHX plate is in a range from 0.2 to 0.8, and a heat exchange tube configured to transport a thermal fluid and disposed on the MHX plate so that heat is transferred between the thermal fluid and the MHX plate, wherein a surface of the MHX plate includes a process flow channel of hydraulic diameter in a range from 0.3 mm to 3 mm and a process fluid in the process flow channel exchanges mass and/or heat with the MHX plate.

The present disclosure describes an evaporative emission control canister system that includes: one or more canisters comprising at least one vent-side particulate adsorbent volume comprising a particulate adsorbent having microscopic pores with a diameter of less than about 100 nm; macroscopic pores having a diameter of about 100-100,000 nm; and a ratio of a volume of the macroscopic pores to a volume of the microscopic pores that is greater than about 150%, and having a retentivity of about 1.0 g/dL or less. The system may further include a high butane working capacity adsorbent. The disclosure also describes a method for reducing emissions in an evaporative emission control system.

Compressor installation includes a compressor device, a compressor element, a compressed gas outlet, a compressed gas outlet pipe connected to the compressor device, and a dryer connecting to the outlet pipe with a desiccant for drying the compressed gas coming from the compressor device. The dryer includes a drying section and a regeneration section with an entry and an exit for a regeneration gas. A regeneration pipe is connected to the entry of the regeneration section. In the regeneration pipe, a first heat exchanger is provided for heating the regeneration gas. The compressor installation includes a heat pipe with a first end which is in contact with a hotspot at a location in the compressor device where the temperature is higher than the temperature at the outlet of the compressor element and with a second end which is in contact with a secondary section of the first heat exchanger.

Method and apparatus for condensing a majority of the solvent in a process gas stream at low temperatures, e.g., below the freezing point of water, ca. −5° C. The gas stream exiting the condenser step may be further processed in one or more emission control devices, such as a single or multi-step series of concentrator devices, such as zeolite concentrator devices. One or more emission control operations can be carried out downstream of the single or multi-step concentrators. The aforementioned condensing process enables the one or more concentrators to operate in a favorable temperature range for removal of 99% or more of VOC, thereby meeting or exceeding strict environmental regulations.

A space habitat includes a water processing assembly including a wastewater tank and a water processing section connected to the wastewater tank. The water processing section includes a pump to urge flow of the wastewater, a mostly liquid separator to separate gas from liquid in the wastewater, a catalytic reactor located downstream of the mostly liquid separator, and one or more sensors located downstream of the catalytic reactor to determine if the wastewater is sufficiently processed. A valve directs the wastewater to a water storage tank if the sensors determine that the wastewater is sufficiently processed, and direct the wastewater to the wastewater tank if the one or more sensors determine that the wastewater is not sufficiently processed. The space habitat further includes one or more of a carbon dioxide removal system, a trace contaminant removal system, a temperature and humidity control system or a waste collection system.

A continuous desulfurization process and process system are described for removal of reduced sulfur species at gas stream concentrations in a range of from about 5 to about 5000 ppmv, using fixed beds containing regenerable sorbents, and for regeneration of such regenerable sorbents. The desulfurization removes the reduced sulfur species of hydrogen sulfide, carbonyl sulfide, carbon disulfide, and/or thiols and disulfides with four or less carbon atoms, to ppbv concentrations. In specific disclosed implementations, regenerable metal oxide-based sorbents are integrated along with a functional and effective process to control the regeneration reaction and process while maintaining a stable dynamic sulfur capacity. A membrane-based process and system is described for producing regeneration and purge gas for the desulfurization.

A vehicle includes a battery and a CO.sub.2 recovery device using electric power of the battery to recover CO.sub.2 contained in inflowing gas. A control device mounted in the vehicle controls the CO.sub.2 recovery device. The control device permits operation of the CO.sub.2 recovery device in the case where a high efficiency recovery condition, at which it is predicted that the efficiency of recovery of CO.sub.2, showing a ratio of the amount of recovery of CO.sub.2 in the CO.sub.2 recovery device with respect to the electric power consumed by the battery, will become equal to or greater than a preset predetermined efficiency, is satisfied, and prohibits operation of the CO.sub.2 recovery device in the case where the high efficiency recovery condition is not satisfied.

A method and exhaust gas treatment system for treating an ammonia-containing exhaust gas, for example a livestock house exhaust gas. The exhaust gas treatment system comprises a plurality of sorbent beds comprising a copper-doped small-pore zeolite, a valve system configured to establish independently for each sorbent bed fluid communication in a first or second configuration, wherein in the first configuration a flow of ammonia-containing exhaust gas contacts the sorbent bed at a temperature of less than 50° C. for storing the ammonia; and in the second configuration a flow of heated gas maintains the sorbent bed at a temperature of at least 300° C. for releasing and treating the ammonia in situ.