Girbotol process

Lime-Kiln Operation. Gases containing up to 40% carbon dioxide from the lime kiln pass through a cyclone separator, which removes the bulk of entrained dust. The gas is then blown through the two scmbbers, which remove the finer dust, cooled, and passes iato an absorption tower. Here carbon dioxide may be recovered by the sodium carbonate or Girbotol process. 

GirhotolAmine Process. This process developed by the Girdler Corporation is similar in operation to the alkali carbonate processes. However, it uses aqueous solutions of an ethanolamine, ie, either mono-, di-, or triethanolamine. The operation of the Girbotol process depends on the reversible nature of the reaction of CO2 with monoetbanolamine [141-43-5] to form monoethanolamine carbonate [21829-52-7]. 

CO2 is also recovered economically from the flue gases resulting from combustion of carbonaceous fuels, from fermentation of sugars and from the calcination of limestone recovery is by reversible absorption either in aqueous Na2COi or aqueous ethanolamine (Girbotol process). 

Girbotol process a continuous, regenerative process to separate hydrogen sulfide, carbon dioxide, and other acid impurities from natural gas, refinery gas, etc., using mono-, di-, or triethanolamine as the reagent. 

Girdler (1) A process for removing acid gases from gas streams by scrubbing with aqueous triethanolamine. Developed by the Girdler Corporation, Louisville, KY, in the 1920s. See also Girbotol. 

FIGURE 9.6 Flowsheet giving the schematic details of Girbotol and related sour gas sweetening processes. Twenty to twenty-four plates are used in the absorbers and strippers [25] for efficient contacting and desorption with monoethanolamine (MEA),... 

A further potential concern in gas processing is the presence of carbon disulfide (CS2) or carbonyl sulfide (COS) in the natural gas. These may be from natural sources or are occasionally contributed from the use of carbon disulfide to remove sulfur blockages from sour gas wells or components of the Girbotol plant. These sulfur compounds react with monoethanolamine to yield complex thiazolidine and oxazolidine heterocycles and polymerization products of these which are not dissociated in the regeneration step of the gas cleaning plant [28] (Eq. 9.15). 

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