Methods of using sorbents to enhance the production of hydrogen from fuel, and related systems, are generally described. In some embodiments, the production of hydrogen from the fuel involves a reforming reaction and/or a gasification reaction combined with a water-gas shift reaction.

Systems and methods are disclosed and include a controller and a water recovery device. The water recovery device includes a desiccant stack including a chamber defining an airflow path therein. The water recovery device includes an evaporator in communication with the desiccant stack and one or more condensers in communication with the desiccant stack. The controller is configured to set the water recovery system to one of an absorption mode and an extraction mode. The water recovery device is configured to receive ambient air in the chamber to remove water vapor using the liquid desiccant and retain the water vapor in the chamber when the water recovery system is in the absorption mode. The water recovery device is configured to remove the water vapor within the chamber when the water recovery system is in the extraction mode.

Systems and methods for operating a water recovery system are disclosed and include activating a condenser of the water recovery system. The method includes measuring a temperature associated with the condenser based on data obtained from a condenser temperature sensor. The method includes comparing the temperature associated with the condenser to a maximum threshold temperature. The method includes activating an auxiliary condenser of the water recovery system in response to the temperature associated with the condenser being greater than the maximum threshold temperature.

The removal of acid gases (e.g., non-carbon dioxide acid gases) using sorbents that include salts in molten form, and related systems and methods, are generally described.

Processes for regenerating sorbents at high temperatures, and associated systems, are generally described.

A humidity control device includes: a storage unit that stores hygroscopic liquid that contains a hygroscopic substance; a vent that is provided in the storage unit; absorption means by which air and the hygroscopic liquid are brought into contact with each other and moisture contained in the air is absorbed by the hygroscopic liquid; an ultrasonic wave generation unit that irradiates at least a part of the hygroscopic liquid, which has absorbed the moisture, with an ultrasonic wave; and removal means by which an atomized droplet that is generated is removed from the hygroscopic liquid that has absorbed the moisture, in which the storage unit suppresses an outflow of a coarse droplet whose particle size is larger than that of the atomized droplet.

Carbon dioxide removal using lithium borate is generally described.

An atmospheric water harvesting material includes a deliquescent salt, a photothermal agent, and a polymeric hydrogel matrix containing the deliquescent salt and photothermal agent.

An atmospheric water harvesting material includes a deliquescent salt, a photothermal agent, and a polymeric hydrogel matrix containing the deliquescent salt and photothermal agent.

The disclosure provides seven integrated methods for the chemical sequestration of carbon dioxide (CO.sub.2), nitric oxide (NO), nitrogen dioxide (NO.sub.2) (collectively NO.sub.x, where x=1, 2) and sulfur dioxide (SO.sub.2) using closed loop technology. The methods recycle process reagents and mass balance consumable reagents that can be made using electrochemical separation of sodium chloride (NaCl) or potassium chloride (KCl). The technology applies to marine and terrestrial exhaust gas sources for CO.sub.2, NOx and SO.sub.2. The integrated technology combines compatible and green processes that capture and/or convert CO.sub.2, NOx and SO.sub.2 into compounds that enhance the environment, many with commercial value.