Vertical desublimation apparatus for crystalline iodine production, comprising: a gas intake, through which vapor can be fed into the apparatus, and a gas exhaust, through which residual air can be discharged; at least one downstream duct comprising a downstream duct inlet and a downstream duct outlet, wherein the intake is fluidically connected to the downstream duct inlet; at least one upstream duct comprising an upstream duct inlet and an upstream duct outlet, wherein the exhaust is fluidically connected to the upstream duct outlet; at least one downstream condenser pipe arranged adjacent to the downstream duct and at least one upstream condenser pipe arranged adjacent to the upstream duct, wherein a cooling medium can be fed through the condenser pipes; a collecting receptacle for collecting crystallized iodine and liquid water arranged at the bottom of the apparatus, fluidically connecting the downstream duct outlet and the upstream duct inlet, the collecting receptacle having a bottom outlet.

A device and method for carbon dioxide capture using circumscribed hollow membranes is disclosed. The device includes a hollow membrane unit having an inner conduit composed of a vapor membrane, and an outer conduit having an inside surface circumscribing the inner conduit forming a lumen. The outer conduit includes a CO.sub.2 pump membrane. The device also includes a mechanical pump maintaining a pressure differential between the lumen and the atmosphere, providing a product stream of CO.sub.2-rich gas from the lumen. The vapor membrane is sufficiently hydrophobic and porous to contain liquid water while also allowing water vapor formed by evaporation to pass through into the lumen. As water vapor passes from the lumen to the atmosphere through the CO.sub.2 pump membrane, a carbon concentration gradient is formed and maintained across the CO.sub.2 pump membrane. The carbon concentration gradient actively pumps CO.sub.2 out of the atmosphere and into the lumen.

A system for spacecraft atmosphere CO.sub.2 capture that has a first heat exchanger configured to receive airflow from the spacecraft atmosphere and to cool the airflow via a first heat exchange with CO.sub.2-depleted air. The system further has a pre-cooler configured to receive and cool the airflow from the first heat exchanger, and has a second heat exchanger configured to receive the airflow from the pre-cooler. The second heat exchanger can cool the airflow via a second heat exchange with the CO.sub.2-depleted air. Deposition coolers can operate in a deposition mode in which CO.sub.2 from the airflow is deposited to generate said CO.sub.2-depleted air, and a sublimation mode in which deposited CO.sub.2 is sublimated into CO.sub.2 gas. A controller is configured to alternately cycle each of the first and second deposition coolers between the deposition mode and the sublimation mode.

A system for spacecraft atmosphere CO.sub.2 capture that has a first heat exchanger configured to receive airflow from the spacecraft atmosphere and to cool the airflow via a first heat exchange with CO.sub.2-depleted air. The system further has a pre-cooler configured to receive and cool the airflow from the first heat exchanger, and has a second heat exchanger configured to receive the airflow from the pre-cooler. The second heat exchanger can cool the airflow via a second heat exchange with the CO.sub.2-depleted air. Deposition coolers can operate in a deposition mode in which CO.sub.2 from the airflow is deposited to generate said CO.sub.2-depleted air, and a sublimation mode in which deposited CO.sub.2 is sublimated into CO.sub.2 gas. A controller is configured to alternately cycle each of the first and second deposition coolers between the deposition mode and the sublimation mode.

The invention provides a water-alcohol separation system and a method for water-alcohol separation for producing a high purity alcohol while achieving energy saving as the whole process. Namely, a water-alcohol separation system including plural separation membrane modules connected in series, a vacuum apparatus for reducing a pressure at a permeated side of each of the separation membrane modules, and a condenser for condensing a vapor that has passed through a membrane, in which plural independent vacuum systems reduce the pressure at the permeated side of the membrane of the separation membrane modules.

A discontinuously operating desublimator for the recovery of products from gas mixtures is disclosed having a housing including an inner cooling line and a housing wall, inwardly directed lamellae arranged on an inside of the housing wall which can be cooled for the desublimation of the product by a cooling medium conducted through ducts on the housing wall. The housing is cylindrical and enables the product to be melted down by a change of pressure.

A discontinuously operating desublimator for the recovery of products from gas mixtures is disclosed having a housing including an inner cooling line and a housing wall, inwardly directed lamellae arranged on an inside of the housing wall which can be cooled for the desublimation of the product by a cooling medium conducted through ducts on the housing wall. The housing is cylindrical and enables the product to be melted down by a change of pressure.

Systems and methods are disclosed for use in the separation of chiral compounds, and enantiomers in particular. The system comprises a cavity (110) for containing a fluid mixture that comprises one or more types of chiral molecules, which may also include enantiomers, and at least one ferromagnetic or paramagnetic substrate (120) providing at least one interface (130) with said fluid mixture. The substrate (120) is magnetized providing a magnetic field Bz perpendicular to said ferromagnetic or paramagnetic interface (130), thereby providing a variation in the interaction energy of chiral molecules of different handedness, aka. enantiomers, with said substrate (120).

Plant and process for the production of liquid methane from a feed gas stream comprising at least methane and carbon dioxide. A feed gas stream is injected into a CO.sub.2 crystallizer in countercurrent fashion against a stream of predominantly liquid methane, thereby crystallizing amounts of carbon dioxide from the feed gas stream. Gaseous methane recovered from the CO.sub.2 crystallizer is liquefied at a liquefaction exchanger.

Plant and process for the production of liquid methane from a feed gas stream comprising at least methane and carbon dioxide. A feed gas stream is injected into a CO.sub.2 crystallizer in countercurrent fashion against a stream of predominantly liquid methane, thereby crystallizing amounts of carbon dioxide from the feed gas stream. Gaseous methane recovered from the CO.sub.2 crystallizer is liquefied at a liquefaction exchanger.