In the formulated amines, methyl diethanolamine is added to the activator, and as a result, by strengthening this amine and maintaining its advantages, its main weakness in the low absorption of carbon dioxide is eliminated. This is done by increasing the rate of reaction of the solvent with carbon dioxide. The main reason for their widespread use in the global gas industry is the reduction in equipment size and energy savings in these processes compared to other amine processes. Other advantages of using these solvents are: reduction of corrosion and reduction of circulating solvent flow Each of the formulated amines is produced exclusively by a specific company and is under the proprietary license of that company. The following table lists the types of formulated amines and their licensed companies.
Activated methyl diethanolamine
One of the most well-known and widely used formulated solvents is activated methylmethanolamine (activated MDEA), licensed by BASF and developed in the early 1970s, with the first commercial natural gas sweetening unit installed in 1982. . In this solvent, methyl diethanolamine is activated by using piperazine and the rate and rate of carbon dioxide absorption is significantly increased. By activating activated methyl diethanolamine, the concentration of carbon dioxide and hydrogen sulfide in the exhaust sweet gas can be reduced to about 5 ppm by volume and 1 ppm by volume. Very low absorption of heavy hydrocarbons, very low corrosion (so that in the manufacture of equipment mainly carbon steel can be used), very low flow rate of circulating solvent, the ability to process gas streams at high pressures (up to 120 bar (bar)) And the low tendency to create foam is one of the major advantages of using solvents.
