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Hydrogen sulfide is often produced from the microbial breakdown of organic matter in the absence of oxygen, such as in swamps and sewers; this process is commonly known as anaerobic digestion, which is done by sulfate-reducing microorganisms. It also occurs in volcanic gases, natural gas deposits, and sometimes in well-drawn water.
Piles of sulfur produced in Alberta by the Claus process awaiting shipment at docks in Vancouver, Canada. The Claus process is the most significant gas desulfurizing process, recovering elemental sulfur from gaseous hydrogen sulfide. First patented in 1883 by the chemist Carl Friedrich Claus, the Claus process has become the industry standard.
Water has a neutral pH of 7 so once a gas is mixed with water, if the resulting mixture has a pH of less than 7 that means it is an acidic gas; if the pH is more than 7, that means it is an alkaline gas. [1] The term/s acid gas and sour gas are often incorrectly treated as synonyms.
hydrogen sulfide chemosynthesis: [1] 18H 2 S + 6CO 2 + 3 O 2 → C 6 H 12 O 6 (carbohydrate) + 12H 2 O + 18 S. In the above process, hydrogen sulfide serves as a source of electrons for the reaction. [6] Instead of releasing oxygen gas while fixing carbon dioxide as in photosynthesis, hydrogen sulfide chemosynthesis produces solid globules of ...
Hydrogen sulfide production depends on various physicochemical, topographic, and hydraulic parameters [6] such as: Sewage oxygen concentration. The threshold is 0.1 mg/l; above this value, sulfides produced in sludge and sediments are oxidized by oxygen; below this value, sulfides are emitted in the gaseous phase. Temperature.
Hydrogen is produced by hydrogenases and nitrogenases enzymes in many microorganisms, some of which are being studied for their potential for biofuel production. [ 8 ] [ 9 ] These H 2 -metabolizing enzymes are found in all three domains of life , and out of known genomes over 30% of microbial taxa contain hydrogenase genes. [ 10 ]
Generally, weak acidic gases can be released from their metal salts by dilute acids, and sometimes just with water: [1] Hydrogen sulfide from metal sulfides; Hydrogen selenide from selenides, e.g. aluminium selenide; Hydrogen telluride from tellurides, e.g. aluminium telluride; Some hydrocarbons can be prepared from certain carbides. Methane ...
Sodium hydrosulfide is the chemical compound with the formula NaSH. This compound is the product of the half-neutralization of hydrogen sulfide (H 2 S) with sodium hydroxide (NaOH). NaSH and sodium sulfide are used industrially, often for similar purposes. Solid NaSH is colorless.