Tuesday, May 4, 2010
Methyldiethanolamine (MDEA), and Diethanolamine (DEA) have been used for CO2 & H2S removal in Gas sweetening unit. DEA is non-selective to CO2 and H2S. However, irreversible reactions of DEA with CO forming corrosive degradation products & increase corrosiveness. MDEA is highly selective to H2S with low corrosiveness. What is performance of mixtures of DEA and MDEA solutions in CO2 and H2S removal ?
In the present paper, the use of amine mixtures employing methyldiethanolamine (MDEA), and diethanolamine (DEA) have been investigated for a variety of cases using a ASPEN HYSYS process simulation. The simulation results show that,
- 40%MDEA with 10% DEA, 30% MDEA with 10 % DEA and 40% MDEA with 5% DEA were the best result in the absorption processes of CO2 from the natural gas.
- 30%MDEA with 10% DEA, 40%MDEA with 5 % DEA and 40%MDEA with 10 % DEA were the best result in the absorption processes of H2S from the natural gas comparing with other mixing amines.
- 20% MDEA with 10% DEA, 30% MDEA with 10 % DEA and the 40% MDEA with 10 % DEA have the lowers amount of H2S in the sweet gas comparing with different percent of DEA without mixing.
- The temperature of rich amine decrease with increase the circulation rate in all different percent of mixing amines and different percent of MDEA without mixing.
- The reboiler temperature was constant in the 20% MDEA with 10 % DEA and in the 30%MDEA, 40%MDEA and in the 50%MDEA, otherwise the reboiler temperature increase with increase the circulation rate in all different percent of mixing amines.
- HYSYS Simulation of MEA Based CO2 Removal
- Amines Type & Points Assist in Selection
- Several Concerns in High CO2 Field Development
- Correct model and thermo package in Amine system simulation using HYSYS
- Safety Moment with H2S
- What are the concerns related to H2S ?
- CO2 Related