An assembly for a vapor provision device includes a reservoir for storing source liquid; a liquid conduit for delivering the source liquid from the reservoir to a vapor generator for vaporizing the source liquid; and a liquid capture element in liquid transfer contact with at least a portion of the liquid conduit between the vapor generator and a part of the liquid conduit that receives liquid from the reservoir, and including an absorbent structure providing a higher capillary force than a capillary force of the reservoir.

A carbon dioxide capture system of an embodiment includes an intake unit, an electrolysis unit, a power supply unit, and a capture unit. The intake unit takes in gas by utilizing gaseous flow around the intake unit, and, in the electrolysis unit, an adsorbent can adsorb and release carbon dioxide by an adjustment of an electric potential of the electrolysis unit. The power supply unit adjusts the electric potential so as to adsorb carbon dioxide from the flowing gas to the adsorbent and release the carbon dioxide from the adsorbent in the electrolysis unit. The capture unit collects the carbon dioxide released from the adsorbent after adsorption to the adsorbent.

An air treatment system for at least partially removing at least one gaseous contaminant contained in indoor air of a room structured for human occupants. The system may comprise an air treatment assembly having an indoor air inlet configured to receive indoor airflow directly from a room, a regenerable adsorbent material configured to adsorb at least one gaseous contaminant contained in the indoor airflow, at least one airflow element for directing the indoor airflow to flow through the air treatment assembly, an indoor air outlet for expelling the indoor air, from the air treatment assembly back into the room, a purge air inlet configured to receive and direct purge air over and/or through the adsorbent material for removal of at least a portion of the at least one gaseous contaminant, and a purge air outlet for expelling the purge air out of the air treatment assembly.

A packed bed for a heat exchanger may comprise a frame and a first fin layer disposed within the frame. A second fin layer may be disposed within the frame. A first perforated sheet may be disposed between the first fin layer and the second fin layer. A sorbent material may be disposed within a volume of at least one of the first fin layer or the second fin layer.

Solar thermal units and methods of operating solar thermal units for the conversion of solar insolation to thermal energy are provided. In some examples, solar thermal units have an inlet, and a split flow of heat absorbing fluid to either side of the solar thermal unit, along a first fluid flow path and a second fluid flow path. Optionally, one or more photovoltaic panels can be provided as part of the solar thermal unit, which may convert solar insolation to electric power that may be used by a system connected to the solar thermal unit.

A preparation method of a high-absorptivity chitosan/bamboo activated carbon composite aerogel include: evenly mixing a chitosan suspension and bamboo activated carbon; dropwise adding glacial acetic acid and stirring to form a solution; dropwise adding a glutaraldehyde solution, and stirring until cross-linking of chitosan is completed; and freezing the obtained liquid in shape, and then performing freeze-drying by means of a vacuum freeze dryer to obtain a chitosan/bamboo activated carbon composite aerogel. The natural, environmentally friendly and degradable chitosan is used as the raw material, bamboo activated carbon is adhered to the chitosan, and the freeze-drying technique is used to prepare the aerogel, so that the bamboo activated carbon is uniformly dispersed and fixed in the three-dimensional space of the aerogel, and the prepared composite aerogel has a high specific surface area and a high porosity, and a high PM2.5 adsorption capacity.

An air treatment system for at least partially removing at least one gaseous contaminant contained in indoor air of a room structured for human occupants. The system may comprise an air treatment assembly having an indoor air inlet configured to receive indoor airflow directly from a room, a regenerable adsorbent material configured to adsorb at least one gaseous contaminant contained in the indoor airflow, at least one airflow element for directing the indoor airflow to flow through the air treatment assembly, an indoor air outlet for expelling the indoor air, from the air treatment assembly back into the room, a purge air inlet configured to receive and direct purge air over and/or through the adsorbent material for removal of at least a portion of the at least one gaseous contaminant, and a purge air outlet for expelling the purge air out of the air treatment assembly.

A silicon-based solid amine sorbent for CO.sub.2 and the making method thereof including: providing a silicon source liquid which is a silicate solution or a liquid organosilicate, wherein the silicate solution comprises water and a first silicate dissolved in the water; mixing the silicon source liquid with a precipitant to perform a precipitation reaction to obtain a product liquid containing a precipitate, wherein the precipitate is a second silicate or silicic acid; filtering out the precipitate and washing the precipitate with water; mixing the precipitate filtrated out but not dried yet with an organic alcohol and then performing an azeotropic distillation to obtain a dehydrated precipitate; calcining the dehydrated precipitate to obtain a silicon-based support, wherein the silicon-based support is a powder of the second silicate powder or a silica powder; and impregnating the silicon-based support with an organic amine solution and then drying to obtain the silicon-based amine-containing solid sorbent for CO.sub.2.

Solar thermal units and methods of operating solar thermal units for the conversion of solar insolation to thermal energy are provided. In some examples, solar thermal units have an inlet, and a split flow of heat absorbing fluid to either side of the solar thermal unit, along a first fluid flow path and a second fluid flow path. Optionally, one or more photovoltaic panels can be provided as part of the solar thermal unit, which may convert solar insolation to electric power that may be used by a system connected to the solar thermal unit.

A process of removing a volatile organic compound (VOC) from a gaseous environment, involving contacting a gaseous feedstream containing one or more VOC's, such as an odoriferous compound, an irritant, a contaminant or pollutant, for example, formaldehyde, with a sorbent under conditions sufficient to reduce the concentration of the VOC's in the gaseous feedstream. The sorbent is comprised of a functionalized graphene prepared by amination of graphene oxide. The sorbent is regenerated by adsorbate desorption under mild conditions of air flow. The process can be run through multiple adsorption-desorption cycles in a single fixed bed or swing bed configuration, and is applicable to purifying indoor air and ventilation air as well as reducing pollutants in industrial waste gas streams.