The gas is passed over the top of the liquid. ( November 2019) ( Learn how and when to remove this template message)Ībsorption bypass odorizers take a portion of the gas stream, the amount being dependent on the flow of gas in the line, and run it through a tank containing liquid odorant. Unsourced material may be challenged and removed. Please help improve this section by adding citations to reliable sources. Methylethyl pyrazine, odor of various foods including coffee and wines.Dimethyl sulfide (DMS), a component of the smell produced from cooking of certain vegetables, notably maize, cabbage, beetroot, and seafoods.Its smell is reminiscent of rotten eggs or cabbage. Methanethiol, commonly known as methyl mercaptan, is added to natural gas as an odorant, usually in mixtures containing methane.
Ethanethiol (EM), commonly known as ethyl mercaptan is used in Liquefied petroleum gas (LPG), and resembles odor of leeks, onions, durian, or cooked cabbage.2-Propanethiol, commonly known as isopropyl mercaptan (IPM) is used as an odorant for natural gas usually in mixtures containing tert-butylthiol.Tetrahydrothiophene (THT), used as an odorant for natural gas, usually in mixtures containing tert-butylthiol.tert-Butylthiol (TBM) the main ingredient in many gas odorant blends.Some odorants contain sulfur, which is oxidized to sulfur dioxide when the gas is burned.
Odorants used for natural gas vary from country to country, depending on gas distribution regulations.
Natural gas odorizers run the gamut from a simple wick in a container to computerized equipment, which controls the amount of odorant based on flow rate, tracks the amount of odorant in inventory, and alarms when odorant is not being injected into the gas stream.
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