3-(Methylsulfonyl)Propylamine as a Regenerative CO₂ Absorbent

Selection Criteria for Antifoams Used in the Acid Gas Sweetening Process

“…Typically, silicone antifoams also suffer from a short effective antifoaming life. 69 Also, silicone antifoams have the tendency to disrupt the normal operation of the absorption process in the column. This may be due to the fact that silicone antifoams precipitate and accumulate in the liquid solvent as the correct dosage is difficult to determine.…”

“…80 Other work in producing efficient antifoams involves the combination of silicone-based antifoam with aminoalkanesulfonic acid or their salts in order to improve the effectiveness of the antifoam. 69 Alkanolamine of taurines or glycines is added to prolong the antifoaming life of the silicone compound. By doing so, several benefits can be obtained such as less of a replenishment of amine, less foam carryover, reduced cost, reduction of painstaking monitoring, and a cleaner environment.…”

“…Comparing between silicone and polyether antifoams, silicone has a lower surface tension and higher efficiency in antifoaming but shorter effective defoaming ability. 69 On the other hand, polyether antifoams demonstrated better temperature stability and resistance to high alkaline solutions but lack in the defoaming rate. Hence, the modification PDMS with polyether would make the compound more compatible and increase the efficiency and the performance of the defoamer.…”