Energy Efficient Solvents for CO₂ Absorption from Flue Gas: Vapor Liquid Equilibrium and Pilot Plant Study

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• 作者：Prachi Singh ; W.P.M. Van Swaaij ; D.W.F. (Wim) Brilman
• 关键词：Vapour Liquid Equilibrium ; VLE ; Pilot Plant ; CO2 ; Energy efficiency ; Solvent Development ; Amine ; Absorption
• 刊名：Energy Procedia
• 出版年：2013
• 出版时间：2013
• 年：2013
• 卷：37
• 期：Complete
• 页码：2021-2046
• 全文大小：754 K

文摘

From solvent screening for new, amine based solvents for CO₂ recovery from flue gas, two most promising solvent formulations, a 51 wt % New Solvent (NS) and a 26.7 % AMP-11.9 % HMDA mixture were selected and tested in an industrial pilot plant, mainly to identify the regeneration energy requirement. In the pilot plant tests CO₂ absorption was done at 40 ¡ãC, 1.3 bar and regeneration at 120 ¡ãC, 2.0-2.2 bar, using both 5 and 10 vol % CO₂ inlet concentration. At 90 % CO₂ recovery and optimized solvent circulation, the NS solvent was the most energy efficient, requiring only 2.48 and 2.26 MJ/kg CO₂ for 5 and 10 vol % CO₂ inlet concentration respectively, whereas the AMP-HMDA solvent required 3.62 and 3.41 MJ/kg CO₂. Both solvents compare favorably to the 30wt % MEA reference measurements in the same pilot plant (4.80 resp. 4.33 MJ/kg CO₂) showing the potential of these energy-efficient solvents.