Carbon Dioxide Removal by Using Absorption Process with 5M Aqueous Solution of 2-(Methylamino)Ethanol

Abstract:

For petroleum industries, CO₂ can cause corrosion, and heating-value reduction. However, CO₂ can be used to enhance the oil recovery for oil production. However, the amount of CO₂ supply is not enough because the cost of carbon capture is high. The main sources of CO₂ come from power generation. The technology to capture CO₂ is carbon capture and storage or CCS. Currently, the effective technology to remove CO₂ from the power plants is chemical absorption and chemicals used in this technology play a key role. Nowadays, the commercially used solvents are monoethanolamine (MEA). Nevertheless, it also has disadvantages such as low capacity and high energy requirement for regeneration thus making CCS costly. Therefore, many new solvents such as 2-(methylamino) ethanol or 2-MAE have been developed to improve efficiency and to reduce the cost of CO₂ capture. Therefore, the objective of this work is to measure the solubility data of CO₂ in a 5M aqueous solution of 2-MAE as a promising solvent at the temperature from 30 °C to 80 °C and CO₂ partial pressures ranging from 5 to 100 kPa. The solubility results of CO₂ in 2-MAE solution are compared with those of aqueous solution of MEA. In term of cyclic capacities, the results show that 2-MAE provides higher performance which is up to 86.8% and 150.9% higher than that of MEA at 15 and 100 kPa, respectively. Furthermore, the results present that the CO₂ loading can increase as partial pressure increases and decrease at higher temperature. It can be concluded that an increase in cyclic capacity leads to the decrease in energy requirement for solution regeneration and liquid-circulation rate, leading to the reduction of the overall capital and operating costs and resulting in the decrease in cost of carbon capture.

• Periodical: Advanced Materials Research (Volume 1125)
• Pages: 312-316
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1125.312
• Online since: October 2015
• Authors: Kreangkrai Maneeintr*, Pimon Iamareerat, Poomsup Manonukul, Suttichai Assabumrungrat, Tawatchai Charinpanitkul
• Keywords: Absorption, Amine Solution, Carbon Capture, Carbon Storage, Greenhouse Gases, Solubility

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