What is Selexol used for?
Table of Contents
What is Selexol used for?
A physical solvent designed to provide effective and economical bulk CO2 removal and selective absorption of H2S, COS, mercaptans, or BTEX from a variety of natural and synthesis gas streams.
What is Selexol made of?
Selexol solvent is a mixture of dimethyl ethers of polyethylene glycols, nontoxic, with a high boiling point, and is an excellent solvent for acid gases.
Is Selexol flammable?
SelexolTM was discovered to be a low toxic and flammable solvent in contrast to Rectisol® which may result to death upon inhalation.
What is Sulfinol?
Sulfinol is an integrated, dual approach to acid gas removal and trace sulphur and mercaptans scrubbing. Sulfinol hybrid solvents enable simple all-in-one sour gas treatment, reducing equipment count and solvent rates significantly.
What is Selexol process?
The Selexol process uses Selexol solvent, a physical solvent made of dimethyl ethers of polyethylene glycol (DEPG),13 to selectively remove H2S/COS plus remove CO2 in bulk from gas streams. This process can also be used to remove and control mercaptan sulfur.
Which physical solvent is best for acid gas removal?
Propylene carbonate is the primary solvent in the Fluor process where it is used mainly for the removal of CO2 from the sour gas. Fluor shows its best performance when treating high pressure gas streams containing high concentrations of acid gas. Propylene carbonate is noncorrosive and nonaqueous.
Is Selexol an amine?
Selexol is a physical solvent, unlike amine-based acid gas removal solvents that rely on a chemical reaction with the acid gases. It is dimethyl ether of polyethylene glycol. Since no chemical reactions are involved, Selexol usually requires less energy than the amine-based processes.
What is Sulfanol used for?
Sulfinol-M is used for the selective removal of hydrogen sulfide over carbon dioxide and the partial removal of carbonyl sulfide (Nasir, 1990). Both Sulfinol solvents are reported to be capable of removing mercaptans and alkyl sulfides to very low levels.
What is sulfolane used for?
Uses. Sulfolane is widely used as an industrial solvent, especially in the extraction of aromatic hydrocarbons from hydrocarbon mixtures and to purify natural gas.
Why do we use rectisol process?
Rectisol is used most often to treat synthesis gas (primarily hydrogen and carbon monoxide) produced by gasification of coal or heavy hydrocarbons, as the methanol solvent is well able to remove trace contaminants such as ammonia, mercury, and hydrogen cyanide usually found in these gases.
How do you get rid of acid gas?
The processes using ethanolamine and potassium phosphate are now widely used. The ethanolamine process, known as the Girbotol process, removes acid gases (hydrogen sulfide and carbon dioxide) from liquid hydrocarbons as well as from natural and refinery gases.
What method of containment removal is normally used against acid gases?
The most common technologies for acid gas removal are cyclic, regenerable, solvent absorption processes. In these processes, a liquid solvent is counter-currently contacted with the syngas in an absorption tower to selectively remove the H2S and/or the CO2.
Is sulfolane a green solvent?
15 Sulfolane is a dipolar aprotic solvent, which frequently performed in gas production and oil refining. 16 The excellent stability and water solubility of sulfolane make it an excellent participant as a green solvent and have attracted extensive attention for potential application in the biorefinery process.
How do you remove sulfolane?
Besides chemical and biological treatments, pump and treat by adsorption on granular activated carbon (GAC) has been applied to remove sulfolane at several sites.
What is a Rectisol process?
The Rectisol process is the most widely used physical solvent gas treating process for acid gas removal using an organic solvent at low temperatures. In general, methanol is used for removal of hydrogen sulfide, carbonyl sulfide, and carbon dioxide as well as removal of organic and inorganic impurities.
What is the difference between sweet and sour gas?
The key difference between sweet and sour natural gas is that the sweet natural gas contains trace amounts of hydrogen sulfide, whereas the sour natural gas contains large amounts of hydrogen sulfide. Moreover, sweet natural gas is non-corrosive, less acidic, and requires little refining.
How does amine scrubbing work?
They simply flow back and forth between the absorption column and the stripping column. The temperature is kept high inside the stripping column. This helps to separate the carbon dioxide and hydrogen sulfide from the liquid amines.
What is AGR in refinery?
Acid gas removal (AGR, also known as amine scrubbing, and amine gas treating) refers to a group of industrial chemical processes which use solutions of amine chemicals to separate hydrogen sulfide (H2S) and carbon dioxide (CO2) from gaseous mixtures.
