What are amine units?

What are amine units?

The Amine Unit A typical Amine Unit consists of an absorber (contactor) and regenerator (stripper) along with their ancillary equipment. A process gas stream is first passed through the absorber, where H2S and CO2 are removed by the “lean” solvent.

What is an amine absorber?

In the absorber, the downflowing amine solution absorbs H. 2S and CO. 2 from the upflowing sour gas to produce a sweetened gas stream (i.e., a gas free of hydrogen sulfide and carbon dioxide) as a product and an amine solution rich in the absorbed acid gases.

How does amine absorb H2S?

Amine Gas Sweetening Process The amine solution is now considered Rich and is carrying absorbed acid gases. The steam rising through the still liberates H2S and CO2, regenerating the amine. Steam and acid gases separated from the rich amine are condensed and cooled.

What is amine circulation rate?

The circulation rate of amine in the absorption process is highly important to ensure effective treatment of acid gases. The acid gas loading of amine is primarily a function of amine circulation rate and contact time. The higher the circulation rate, the higher the removal efficiency of CO2 in the treated gas.

Is amine a caustic?

The most commonly used bases are amines, ammonia and/or caustic. Amine bases allow for the formation of colloid-compatible ammonium salts, while caustic leads to colloid-destabilizing sodium/potassium salts, as given by the following two chemical equations.

What is amine reflux?

Reflux is a process where a fluid is removed from a vessel, condensed and returned to the vessel to enhance the process. The reflux system consists of reflux condenser, accumulator and pump. The condensed liquids are pumped to the top of the stripper to reflux. …

What is the similarities of amine and amide?

Compounds containing a nitrogen atom bonded in a hydrocarbon framework are classified as amines. Compounds that have a nitrogen atom bonded to one side of a carbonyl group are classified as amides. Amines are a basic functional group. Amines and carboxylic acids can combine in a condensation reaction to form amides.

Is amine a gas or liquid?

Chemical resistance requirement measurement Amine gas treatment is a process that uses aqueous solutions of various alkylamines (known as amines) to dissolve and remove hydrogen sulfide and carbon dioxide from the refinery sour gases, producing ‘sweet gas’.

What are the components of an amine gas treating process?

A typical amine gas treating process (the Girbotol process, as shown in the flow diagram below) includes an absorber unit and a regenerator unit as well as accessory equipment. In the absorber, the downflowing amine solution absorbs H 2S and CO

What should be considered when selecting an amine?

The secondary objective is to select the amine which optimizes equipment size and minimizes plant operating costs. Some of the factors to be considered in the selection of the proper amine for design or existing plant evaluation include: 1.

Who are the companies that use MDEA based amines?

BASF, Betz Chemical, Dow, Huntsman Chemical, Shell, Union Carbide and other companies offer MDEA based specialty amines to enhance or to “customize” the sweetening capability of the amine solution.

How are amines selected for gas sweetening units?

The selection of an amine for gas sweetening is complex and must be based on several process considerations. These factors are analyzed based on experimental data and a process simulation program for gas sweetening called TSWEET. Proceedings GPA Regional Meeting, Sept. 1994.