Which amine is most prone to causing steam line deposits in systems with high CO2 levels?

Cyclohexylamine is known to be particularly prone to causing steam line deposits in systems that have high levels of CO2. This propensity can be attributed to its behavior in the presence of carbon dioxide, where it can lead to the formation of amine salts that can precipitate and contribute to deposits.

In systems with elevated CO2, cyclohexylamine can react with carbonic acid to form a salt, especially under conditions of high temperature and pressure typical in steam systems. This reaction can significantly increase the potential for deposit formation, which can lead to operational issues such as reduced heat transfer efficiency and potential system overheating.

Other amines, such as Morpholine, DEAE, and AMP, may offer advantages in terms of stability and conducting less reaction with CO2 under similar circumstances, making them less likely to contribute to such deposits in high CO2 environments. Thus, cyclohexylamine’s specific reactivity with CO2 at elevated temperatures makes it the most prone among the choices provided to cause steam line deposits.