Effect of MDEA rich liquid ammonia concentration on regeneration efficiency
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Our company’s technical experts say that the higher the amine concentration, the more difficult regeneration becomes. The results we obtained in the laboratory don’t support this theory, do they? What are your thoughts, experts? :)
I’m not sure what you mean by difficulty in regeneration Additionally, the concentration of the amine solution is usually controlled at around 30% in domestic plants, while it is generally kept around 50% in foreign plants. Too high a concentration can easily cause foaming.
Hello, can I add you on QQ?
I have been working in desulfurization for over 20 years and had never considered this issue. I’m not sure how significant this question is?
Yes, the amine solution concentration in our factory is also kept at 30%.
Personal analysis: The amine concentration is 30% domestically and 50% abroad, for several reasons: 1. Amines have a certain solubility in liquid hydrocarbons, which leads to losses of these amines; concentration is the main factor affecting such losses. To reduce these losses, lower concentrations are used in operations. If regeneration is carried out centrally throughout the plant, the solvent used must meet the requirements of all the desulfurization units in the plant. Taking everything into account, for 30% ； 2. The quality of domestic solvents is unstable. As for the impact on regeneration, I don’t understand the reason.
A higher water content in the amine solution results in a lower partial pressure of the acidic components, which is indeed beneficial for regeneration.
Freshening agents generally have a high concentration; the typical concentration used in devices is 25-30%
Difficult regeneration means that the hydrogen sulfide level after regeneration is not up to standard
The liquid ammonia concentration in China seems to be around 30-35%. If the concentration is higher, there will be problems. Compared to foreign countries, China’s production processes have certain shortcomings