A carbon dioxide scrubber includes an adsorption chamber through which an adsorption airflow is directed, a regeneration chamber through which a regeneration airflow is directed, and a divider wall separating the adsorption chamber from the regeneration chamber. A carbon dioxide sorbent bed extends across the adsorption chamber and the regeneration chamber. The carbon dioxide sorbent bed is configured to adsorb carbon dioxide from the adsorption airflow into the sorbent bed and exhaust carbon dioxide from the carbon dioxide sorbent bed into the regeneration airflow. The carbon dioxide sorbent bed is continuously movable through the adsorption chamber and the regeneration chamber.

Systems and methods of direct air capture are described. Systems include a plurality of moving adsorber panels in a linear direction (or circular configuration) and one or more fans configured to move air across the adsorber panels; such adsorber panels may be oriented vertically or horizontally, relative to the ground. Systems may include an independent regeneration box that comprises a system of headers, ducts and valves configured to deliver and remove a plurality of gases to the regeneration box. The regeneration box contains multiple chambers such that steps such as oxygen removal and panel cooling may be performed independently from and simultaneously to thermal preheating and desorption of the CO.sub.2 on the panels. The desorption panels may be configured to achieve counter-current flow to the hot gases used for thermal preheating and desorption. A multi-stage heat pump may facilitate reuse of waste heat and decarbonization of the process heating requirements.

A purifying device for purifying a process fluid that flows in a dehumidifying plant for dehumidifying plastics includes a first layer configured for filtering the process fluid, and a second layer configured for reducing, by adsorption, substances that are harmful for health, in particular COV/SOV, which are present in the process fluid.

Systems and methods of direct air capture are described. Systems include a plurality of moving adsorber panels in a linear direction (or circular configuration) and one or more fans configured to move air across the adsorber panels; such adsorber panels may be oriented vertically or horizontally, relative to the ground. Systems may include an independent regeneration box that comprises a system of headers, ducts and valves configured to deliver and remove a plurality of gases to the regeneration box. The regeneration box contains multiple chambers such that steps such as oxygen removal and panel cooling may be performed independently from and simultaneously to thermal preheating and desorption of the CO.sub.2 on the panels. The desorption panels may be configured to achieve counter-current flow to the hot gases used for thermal preheating and desorption. A multi-stage heat pump may facilitate reuse of waste heat and decarbonization of the process heating requirements.

A portable device for removing gaseous pollutants from the surrounding air includes: a portable enclosure having a boundary that encloses an interior region with an opening that provides for access to the interior region, a fan situated in the interior region, a screening element that has a defined porosity and is configured to adjustably and temporarily enclose a confined space and also cover the opening, a plurality of activated carbon granules of a specified size that are situated in the confined space, wherein the screening element porosity is selected so as to generally prevent the activated carbon granules from passing through the screening element, and wherein the screening element's adjustability enables temporary access to the confined space in order to remove and replenish the activated carbon granules.

A method for regulating the humidity in a gas. In the first step, the humidity in a gas entering a bubbler at a flow rate is regulated between 200 NL/h and 2,000 NL/h. The gas entering the bubbler through the inlet of the bubbler tank passes throughout the first porous matrix. The humidified gas comes out through the outlet of the bubbler tank and circulates towards a compressor. In the second step, the gas derived from the first step is dried. The gas coming out of the compressor passes through a T-shaped tube including one inlet and two outlets. One of the outlets is arranged vertically and lets the liquid phase of the gas flow by gravity effect, thereby creating a condensate. The other outlet is connected at the bottom of a desiccant reservoir.

One embodiment of the present invention sets forth a technique for operating an oxygen concentrator. The technique includes measuring a product gas within an oxygen concentrator to produce a product gas measurement, and determining that an output of the oxygen concentrator is fluidly connected to a respiratory ventilation device based on the product gas measurement. The technique further includes, in response to determining that the oxygen concentrator is fluidly connected to the respiratory ventilation device, determining that the output of the oxygen concentrator does not meet a supply gas requirement of the respiratory ventilation device and, in response to determining that the output of the oxygen concentrator does not meet the supply gas requirement, adjusting a control output in the oxygen concentrator to modify operation of the oxygen concentrator.

System and method for removing molecular contaminants from an air stream are disclosed. The system includes first, second and third filter. The first filter removes organic contaminants from an air stream passing through the first filter. The second filter is downstream of the first filter, is physically and chemically exchangeable with the first filter and removes organic contaminants from the air stream output of the first filter. The third filter, downstream of the second filter, is not exchangeable with the first filter or the second filter. The first position filter can be replaced by the second filter in the second position when the first filter in the first position becomes depleted as detected. A new filter in the second filter position is inserted. Replacing the depleted first filter with the second downstream filter reduces costs and waste while inserting the new filter in the second position ensures removing organic contaminants.

A dehumidifying plant for dehumidifying plastics is provided with a purifying device for purifying a process fluid that flows in the dehumidifying plant and includes a first layer configured for filtering the process fluid, and a second layer configured for reducing, by adsorption, substances that are harmful for health, in particular COV/SOV, which are present in the process fluid.

Systems and methods of direct air capture are described. A method of fan speed control in a direct air capture (DAC) system includes actuating a first fan to produce a first airflow and a second fan to produce a second airflow. The first fan is disposed proximate to a first portion of the DAC system, and a plurality of adsorber panels are configured to be translated through the DAC system through at least the first portion and then subsequently through a second portion of the DAC system. The second fan is disposed proximate to the second portion of the DAC system, and a flow rate of the second airflow is less than the flow rate of the first airflow. Both the first airflow and the second airflow are configured to flow through the plurality of adsorber panels and be discharged through the first fan to an external environment.