Carbon Dioxide Capturing from Natural Gas using Di-glycol Amine and Piperazine – A New Solvent Mixture
Rehab M. El-Maghraby1, Aly A. Salah2, Abeer M. Shoaib3
1Rehab M. El-Maghraby, Petroleum Refinery and Petrochemical Engineering Department, Faculty of Petroleum and Mining Engineering, Enhanced Oil Recovery Laboratory, Suez University, Suez, Egypt: Rehab.
2Aly A. Salah, Gulf of Suez Petroleum Company (GUPCO), Cairo..
3Abeer M. Shoaib, Petroleum Refinery and Petrochemical Engineering Department, Faculty of Petroleum and Mining Engineering, Suez University, Suez.
Manuscript received on November 11, 2019. | Revised Manuscript received on November 20 2019. | Manuscript published on 30 November, 2019. | PP: 11378-11383 | Volume-8 Issue-4, November 2019. | Retrieval Number: D4221118419/2019©BEIESP | DOI: 10.35940/ijrte.D4221.118419
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The effect of adding Piperazine to di-glycol amine (DGA) to reduce the CO2 content in natural gas from 10% to 1% by mole was studied. Aspen HYSYS was used to simulate the process. Different concentrations of DGA (45, 50 and 55%) and Piperazine (3, 5, 7, 9 and 11%) were investigated. The effect of circulation rates variation from 1000 kgmol/hr. to 5000 kgmol/hr. were examined. Moreover, temperature ranges from 38 oC to 80 oC and pressure ranges from 45 kg/cm2 to 80 kg/cm2 were studied for 55% DGA without and with the addition of Piperazine. It was found that adding 9% Piperazine to 55% DGA achieved the best absorption efficiency. By using Piperazine, the circulation rate required to reach the 1% CO2 level was reduced to 3250 kgmol/hr. The amount of captured CO2 was found to increase with the decrease in the lean gas temperature and the increase in absorber pressure.
Keywords: Amine Based Solvents; Carbon Dioxide; Gas Sweetening; CO2 Capture; Piperazine (PZ); Di-Glycol Amine (DGA).
Scope of the Article: Problem Solving and Planning.