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The first patent for an oxygen scavenger used an alkaline solution of pyrogallic acid in an air-tight vessel. [7] [8] Modern scavenger sachets use a mixture of iron powder and sodium chloride. [8] Often activated carbon is also included as it adsorbs some other gases and many organic molecules, further preserving products and removing odors.
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A chlorate candle, or an oxygen candle, is a cylindrical chemical oxygen generator that contains a mix of sodium chlorate and iron powder, which when ignited smolders at about 600 °C (1,100 °F), producing sodium chloride, iron oxide, and oxygen at a fixed rate of about 6.5 man-hours per kilogram of the mixture. The mixture has an indefinite ...
An oxygen concentrator takes in air and removes nitrogen from it, leaving an oxygen-enriched gas for use by people requiring medical oxygen due to low oxygen levels in their blood. [4] Oxygen concentrators provide an economical source of oxygen in industrial processes, where they are also known as oxygen gas generators or oxygen generation plants.
It is a volatile oxygen scavenger [2] [3] and reacts in a ratio of 2.8/1 DEHA/O2. It is employed in high pressure (>70 bar) boiler systems due to a very low rate of reaction at low temperatures and pressures. Due to its volatility, it acts as an oxygen scavenger throughout the entire boiler system due to steam carryover.
A carbon dioxide scrubber. A carbon dioxide scrubber is a piece of equipment that absorbs carbon dioxide (CO 2).It is used to treat exhaust gases from industrial plants or from exhaled air in life support systems such as rebreathers or in spacecraft, submersible craft or airtight chambers.
In exchange, von Linde was given a stake and a board position in Brin's Oxygen Company, which he held until 1914. The new process replaced the inefficient barium oxide process, paving the way for larger-scale and more efficient production. In 1906, the Brin brothers renamed the company the British Oxygen Company (BOC). [2]
In atmospheric chemistry, the most common scavenger is the hydroxyl radical, a short-lived radical produced photolytically in the atmosphere. It is the most important oxidant for carbon monoxide , methane and other hydrocarbons , sulfur dioxide , hydrogen sulfide , and most of other contaminants, removing them from the atmosphere.
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