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What is a Rectisol unit?

What is a Rectisol unit?

RECTISOL® is a physical acid gas removal process using an organic solvent (typically methanol) at subzero temperatures. Commercial scale RECTISOL® wash units are operated world wide for the purification of hydrogen, ammonia-, methanol syngas and the production of pure carbon monoxide and oxogases.

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.

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.

How do you desulfurize natural gas?

Raw natural gas contains various concentrations of hydrogen sulfide (H2S) gas, which needs to be reduced to a concentration below 4 parts per million in the US. Conventionally, natural gas desulfurization is accomplished by contacting the gas stream with a liquid stream that absorbs the H2S.

What is used for syngas purification?

Rectisol™ is a physical washing process and involves the use of a solvent to remove acid gases from raw syngas.

What is syngas formula?

A mixture of CO and hydrogen is known as syngas (synthesis gas or water gas). It is used for manufacturing methanol. It is produced by the action of steam on hydrocarbons or coke at high temperature in the presence of a catalyst. CH4(g)+H2O(g)1270K NiSyngas.

What is Flexsorb?

Description. FLEXSORB™ SE is is a sterically hindered amine proprietary to ExxonMobil Research and Engineering Company, useful for selective gas scrubbing. Monument Chemical Bayport, LLC. has been authorized by ExxonMobil Research and Engineering Company as a supplier of FLEXSORB™ SE for licensed users.

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 Purisol process?

Purisol process. [Removal of acid gases from syngas and natural gas streams using physical absorption in N-methylpyrrolidone].

How do you remove sulfur dioxide?

Removal of sulphur after combustion SO2 emissions generated during combustion/oxidation can be reduced by treating the flue gases before they are emitted into the atmosphere via a stack; this is termed flue gas desulphurisation (FGD).

What is Rectisol and how does it work?

Rectisol is the trade name for an acid gas removal process that uses methanol as a solvent to separate acid gases such as hydrogen sulfide and carbon dioxide from valuable feed gas streams. By doing so, the feed gas is made more suitable for combustion and/or further processing.

What is Rectisol™ gasification?

Through a process of flashing and stripping, the rich solvent can then be regenerated. Today, Rectisol™ is the leading process for providing high purity gasification-based syngas for catalytic downstream applications.

What are the two basic configurations of the Rectisol process?

Two basic configurations of the Rectisol process are the nonselective standard process and the selective version. In the nonselective or single-step process the CO 2 and H 2 S are absorbed simultaneously; whereas, in the selective or two-step design H 2 S is removed in the first step followed by CO 2 removal in the second step.

What is the difference between Rectisol and refrigeration?

The Rectisol process requires more electrical energy for refrigeration to maintain the low temperatures required but it also requires less steam energy for regeneration.

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