Processes and apparatuses for operating a centrifugal gas compressor. A storage tank containing a liquid buffer material is provided and used to offset density fluctuations in the gas stream passed to the compressor. The storage tank may contain a component of the high-pressure gas stream provided by the compressor, such as carbon dioxide.

A method for separating gaseous carbon dioxide from a gas mixture having the following steps: (a) contacting the gas mixture with sorbent material to allow gaseous carbon dioxide to adsorb under ambient conditions, using a speed of the adsorption gas flow; (b0) isolating the sorbent with adsorbed carbon dioxide from said flow-through of gas mixture; (b1) injecting a stream of saturated steam at ambient conditions and inducing an increase of the temperature of the sorbent to a temperature between 60 and 110° C., (b2,b3) extracting at least the desorbed gaseous carbon dioxide while still injecting or circulating steam at ambient atmospheric pressure conditions into the unit; and (c) bringing the sorbent material to ambient atmospheric temperature conditions. The speed of steam flow through the unit in step (b1) or on average in steps (b1)-(b3) is in the range of 0.5-10 times the speed of the adsorption in step (a).

An oxygen generation device having a compressed air supply device, air cooling coil, a fan, pneumatic valve system, a housing, at least one media insert, an on-off switch, a printed circuit board, and a touch screen. The pneumatic valve system includes an air inlet port, a first air outlet port connected to the inlet of the first media insert, a second air outlet port connected to the inlet of the second media insert. The air inlet port receives compressed air from the compressed air supply device and alternatingly provides the compressed air to one of the first media insert and the second media insert. The lower housing includes check valve ball moveable between the first position and the second position and alternatingly controlling a flow of compressed air through the first media insert and the second media insert.

Provided is a respiratory monitoring device that measures and outputs the substantial use time of an oxygen supply device. A respiratory monitoring device (4) used in combination with an oxygen supply device (1) delivering highly concentrated oxygen gas includes a detection unit (6) that detects a change in breathing-related information representing at least one of a pressure, a flow rate, and a gas temperature, based on exhalation and inhalation, a calculation unit (725) that calculates a respiratory rate, based on the change in breathing-related information, a determination unit (726) that determines whether breathing is present, and whether a user of the oxygen supply device is present, based on the respiratory rate, a measurement unit (727) that measures a duration in which a user of an oxygen supply device has been determined to be present, based on a determination result obtained by the determination unit, and an output unit (728) that outputs a cumulative measurement result for the duration.

Generation of bubbles in an organic-substance production apparatus is suppressed. A gas treatment method including: an adsorption step of passing a source gas containing at least carbon dioxide and nitrogen through an adsorption unit housing an adsorbent for adsorbing carbon dioxide to reduce a carbon dioxide concentration in the source gas; a supply step of supplying the source gas whose carbon dioxide concentration has been reduced by the adsorption step to an organic-substance production apparatus that produces an organic substance; and a monitoring step of monitoring a carbon dioxide concentration and a nitrogen concentration in the source gas before passing through the adsorption unit, a carbon dioxide concentration and a nitrogen concentration in the source gas after having passed through the adsorption unit, or a carbon dioxide concentration and a nitrogen concentration in the source gas having been supplied to the organic-substance production apparatus; wherein the adsorption step has an ability regulation step of enhancing an ability of the adsorption unit to reduce a carbon dioxide concentration in the source gas, when a total concentration of the carbon dioxide concentration and the nitrogen concentration monitored in the monitoring step exceeds a threshold value.

Entrained metal hydride particle are removed from a flow of hydrogen from a Mg-based hydride storage unit using not only a particle filter but improvements for reducing or eliminating drastic changes in flow. In addition to or alternative to removal of entrained metal hydride particles, methane produced by reaction of hydrogen with steel in a metal hydride system preferably operated above 350° C. is removed downstream of the Mg-based hydride storage unit using an adsorption cartridge, preferably containing activated carbon.

Provided is a respiratory rate measurement device (4), the respiratory rate measurement device (4) including a detection unit (6) that detects an in-tube pressure and/or an in-tube gas flow rate in a tube (2) supplying concentrated oxygen gas to a patient from a pressure swing adsorption oxygen concentration device (1) connected to the patient and concentrating oxygen in the air by periodically repeating pressurization and depressurization, and outputs pressure data and/or gas flow rate data, an arithmetic operation unit (722) that extracts patient respiratory information data, based on the pressure data and/or the gas flow rate data, and an estimation unit (723) that estimates a respiratory rate per predetermined time, based on the patient respiratory information data, wherein the estimation unit (723) estimates the respiratory rate using, as a respiratory interval, a time Δt in which the autocorrelation coefficient takes a peak.

A three-product PSA system which produces three product streams from a feed gas mixture comprising a light key component, at least one heavy key component, and at least one intermediate key component is described. The three-product PSA system produces a high pressure product stream enriched in the light key component, a low pressure tail gas stream enriched in the at least one heavy key component, and an intermediate pressure vent gas stream enriched in the at least one intermediate key component.

Described herein are various embodiments of an oxygen concentrator system that includes a home oxygen concentrator system couplable to a portable oxygen concentrator system.

A device for producing purified oxygen, has a feed (1, 1′) of a mixture of oxygen and argon, and has at least one bed (2, 2A, 2B) of oxygen adsorption material, a purge (3, 3′) for discharging the separated argon and a circuit (4, 4′) for injecting a portion of the purified oxygen produced, into the feed (1, 1′). The device has a programmable logic controller (PLC) for treating the degree of purity and/or the production flow rate that can be set by the user and a control of said purge (3, 3′) as a function of the degree of purity of the purified oxygen and/or of the production flow rate which are desired by the user.