This disclosure includes systems and methods for extracting water vapor from atmospheric air and, more particularly, but not by way of limitation, systems and methods for optimizing liquid water production from air, in some instances, taking into account diurnal variations. The systems comprise an adsorption zone an a desorption zone, an actuator to move a desiccant between the adsorption zone and the desorption zone. The liquid water production is optimized based, at least in part, on measurements of one or more of: an ambient air temperature, ambient air relative humidity, and a level of solar insolation.

This disclosure includes systems and methods for extracting water vapor from atmospheric air and, more particularly, but not by way of limitation, systems and methods for optimizing liquid water production from air, in some instances, taking into account diurnal variations. The systems comprise an adsorption zone an a desorption zone, an actuator to move a desiccant between the adsorption zone and the desorption zone. The liquid water production is optimized based, at least in part, on measurements of one or more of: an ambient air temperature, ambient air relative humidity, and a level of solar insolation.

An air treatment device includes: a treater configured to capture a toxic substance contained in target air; a regenerator configured to remove the toxic substance from the treater; a detector configured to detect an index correlated with a concentration of the toxic substance contained in room air; and a control unit configured to control the regenerator according to a detection value detected by the detector.

A system for obtaining water and carbon dioxide from an incoming first gas stream. The system comprises a first inlet for said incoming first gas stream, a first sorbent station comprising a first sorbent material for removing water vapour from said first gas stream, a second sorbent station comprising a second sorbent material for removing carbon dioxide from said first gas stream; and a first exhaust for said first gas stream. The system is configured to flow said first gas stream through the first inlet, the first sorbent station, the second sorbent station and the first exhaust. The system may be used in an environmentally controlled facility for growing plant material or in a building space conditioning. The present invention may therefore enable plant cultivation and/or building space conditioning whilst removing carbon dioxide from the atmosphere and therefore may help to combat climate change and benefit the environment, if implemented on a sufficient scale.

A system for obtaining water and carbon dioxide from an incoming first gas stream. The system comprises a first inlet for said incoming first gas stream, a first sorbent station comprising a first sorbent material for removing water vapour from said first gas stream, a second sorbent station comprising a second sorbent material for removing carbon dioxide from said first gas stream; and a first exhaust for said first gas stream. The system is configured to flow said first gas stream through the first inlet, the first sorbent station, the second sorbent station and the first exhaust. The system may be used in an environmentally controlled facility for growing plant material or in a building space conditioning. The present invention may therefore enable plant cultivation and/or building space conditioning whilst removing carbon dioxide from the atmosphere and therefore may help to combat climate change and benefit the environment, if implemented on a sufficient scale.

A system and method for, removing carbon dioxide from a carbon dioxide laden gas mixture, the system comprising a group of carbon dioxide removal structures moving along a closed curve track. At one location along the track is located a desorption or regeneration box, into which each capture structure passes in order to be regenerated. The majority of the CO2 removal structures are fed ambient air, or an admixture of ambient air with a minor portion of a flue gas, and exhaust CO2-lean air. At least one selected such removal structure within each group, at a location immediately preceding its entry into the capture structure, is fed a flue gas comprising at least 4% CO2 by volume. A method for removing carbon dioxide from the atmosphere is provided utilizing a system operating in the same manner as the preceding system.

A system and method for, removing carbon dioxide from a carbon dioxide laden gas mixture, the system comprising a group of carbon dioxide removal structures moving along a closed curve track. At one location along the track is located a desorption or regeneration box, into which each capture structure passes in order to be regenerated. The majority of the CO2 removal structures are fed ambient air, or an admixture of ambient air with a minor portion of a flue gas, and exhaust CO2-lean air. At least one selected such removal structure within each group, at a location immediately preceding its entry into the capture structure, is fed a flue gas comprising at least 4% CO2 by volume. A method for removing carbon dioxide from the atmosphere is provided utilizing a system operating in the same manner as the preceding system.

A water harvesting unit may include a chamber and a vessel. The chamber may include a first plenum space and a second plenum space located on either side of a partition member. The vessel may be supported for rotation within the chamber. The vessel may include a base and a plurality of sidewalls. The plurality of sidewalls may extend from the base to a vessel opening. The base may be substantially fluid impermeable and at least a portion of the plurality of sidewalls may be fluid permeable. The base and a majority of the plurality of sidewalls of the vessel may be disposed in the first plenum space. The vessel opening may open to the second plenum space via an opening in the partition member.

A water harvesting unit may include a chamber and a vessel. The chamber may include a first plenum space and a second plenum space located on either side of a partition member. The vessel may be supported for rotation within the chamber. The vessel may include a base and a plurality of sidewalls. The plurality of sidewalls may extend from the base to a vessel opening. The base may be substantially fluid impermeable and at least a portion of the plurality of sidewalls may be fluid permeable. The base and a majority of the plurality of sidewalls of the vessel may be disposed in the first plenum space. The vessel opening may open to the second plenum space via an opening in the partition member.

There is provided an exhaust system for the treatment of a humid exhaust gas comprising ammonia in an amount of up to 250 ppm, the system comprising: a dehumidifier system comprising a humid air inlet for providing a flow of humid exhaust gas; an exhaust gas inlet for providing a flow of dehumidified exhaust gas; an ammonia storage material arranged to receive the dehumidified exhaust gas from the exhaust gas inlet; an ammonia oxidation catalyst arranged downstream of a selected portion of the ammonia storage material; and a heating device for heating gas before it passes through the selected portion of the ammonia storage material to release ammonia stored therein for treatment on the ammonia oxidation catalyst; wherein the system is configured so that the selected portion of the ammonia storage material changes over time; and wherein the flow of dehumidified exhaust gas provided by the exhaust gas inlet is received from the dehumidifier system.