Provided is a system for adsorbing a gaseous component comprising nitrogen from a pressurized flow of air containing the gaseous component. The system comprises a first adsorption bed, and a second adsorption bed. Each of the adsorption beds are suitable for selectively adsorbing the gaseous component from the flow of air to produce a product gas having a higher oxygen concentration than that of the air. The system includes an adjustable feed gas supply which alternately supplies the first adsorption bed and the second adsorption bed with the air. The first adsorption bed is supplied with air during a first half cycle of operation of the system, and the second adsorption bed is then supplied with air during a second half cycle of operation of the system. The feed gas supply enables adjustment of at least one parameter relating to the amount or respective amounts of air being supplied to the first adsorption bed in the first half cycle and/or to the second adsorption bed in the second half cycle. A connection and valve assembly is provided between the first and second adsorption beds. The connection and valve assembly diverts a portion of the product gas, produced from the respective absorption bed being supplied with the flow of air during the respective half cycle, to the other adsorption bed. This causes previously adsorbed gaseous component to be released from latter. The released gaseous component then escapes from the system, e.g. to the atmosphere, via a vent. A sensor system determines a measure of the flow rate of waste gas, including the released gaseous component, escaping from the system via the vent. The at least one parameter can be adjusted based on the measure in order to tune the performance of the system. Further provided is a method for operating the system.

Disclosed are an activated carbon adsorption tower and a gas purification device. An activated carbon adsorption tower comprises an adsorption tower body (1), a gas inlet (2) and a gas outlet (3) arranged on the adsorption tower body (1); the adsorption tower body (1) is provided with an activated carbon passage (11), a swash plate (12) and a gas passage in communication with the gas inlet (2) and the gas outlet (3); the gas passage is separated by the swash plate (12) into a U shape or serpentine shape, making the gas passage pass through the same activated carbon passage (11) from the opposite direction at least once; and the activated carbon passage (11) is provided with flowing activated carbon inside and gas holes on the passage wall for communicating with the gas passages on both sides.

The present invention is directed to a method and system of purifying hydrogen supplied from a storage cavern, particularly to removing methane and other hydrocarbons from the hydrogen withdrawn from the cavern by using selective adsorption. The adsorbed impurities can be removed from the adsorbent by increasing the temperature, reducing the pressure, or a combination of both.

According to one embodiment, a carbon dioxide adsorption-desorption device including an electrode that includes a porous composite is provided. The porous composite includes an electro-conductive component and a porous material on the electro-conductive component. The porous material has pores of an angstrom size or a nanometer size, and includes a moiety exhibiting redox activity according to electrical response.

Described are storage and dispensing systems, and related methods, for storing and selectively dispensing high purity reagent gas from a storage vessel in which the reagent gas is held in sorptive relationship to pyrolyzed carbon adsorption particles.

An air purification device for maintaining a clean smelling bathroom includes a housing, which is mountable to a tank of a toilet, and a plurality of bulbs, which is mountable to an underside of a seat of the toilet. An opening is positioned in the housing to vent the housing. A tube is attached to and extends from the housing to a bowl of the toilet. A battery, a pump, and a filter are attached to and positioned in the housing. The battery is operationally engaged to the pump and the bulbs, positioning the bulbs to selectively illuminate an area proximate to the toilet. The pump draws air from the bowl through the tube into the housing, where the filter absorbs malodorous compounds in the air to purify the air, thus maintaining a clean smell in proximity to the toilet.

Disclosed in the present invention are a pressure equalizing system for air separation purification, and a control method. The system comprises: a first air main pipe; a pressurizing gas pipeline, which is connected to the first air main pipe and used for receiving a pressurizing gas and delivering same to the first air main pipe; and a control valve, located on the pressurizing gas pipeline, and having a degree of opening regulated by the flow regulator, thereby regulating an air intake amount of the pressurizing gas pipeline. The present invention solves the problem of an air separation rectification process being affected when dry nitrogen is used for pressure equalization of an adsorber; in the switching process of entering an adsorption stage from a regeneration stage, pressurizing dry nitrogen used in a pressure equalizing step previously mixes with damp air from a main air compressor before entering the adsorber, such that the gas components flowing towards an air separation cold box remain substantially unchanged, in order to reduce disturbance in conditions of gas entering a rectification column to take part in rectification due to a gas component gradually changing from dry nitrogen to dry air in the prior art, thus stabilizing the process conditions of the air separation cold box.

In some implementations, a system for removing oxygen from a container includes a recirculation pump and an oxygen removal device. The recirculation pump includes an intake and a discharge, and the intake includes a first connector. The discharge is fluidically connected to an oxygen removal device.

A method and apparatus for purifying air via a pre-purification unit (PPU) of an air separation unit (ASU) system can include passing air through a first adsorber of the PPU to purify the air for operation of the ASU system while it is at or below a first pre-selected operational capacity. In response to the operational capacity of the ASU system needing to be increased to a level above the first pre-selected operational capacity threshold, a second adsorber can be brought on-line in parallel with the first adsorber or in series with the first adsorber to provide improved purification capacity to account for the increased demand for purification capacity resulting from the increased operational capacity of the ASU system. This second adsorber can be different from the first adsorber (e.g. different in size, adsorption capacity for impurities within air, and/or configuration, etc.).

Provided herein are atmospheric water harvesting systems that are tailored with an optimal adsorption threshold, based on energy cost and water availability considerations. The systems include a plurality of adsorbent modules, each containing metal organic frameworks of various adsorption thresholds. Such a design enables real time adjustment to achieve optimal harvesting conditions in changing atmospheric conditions, whether for daily or seasonal humidity variations.