A short-cut method for assessing absorbents for post-combustion carbon dioxide capture

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• 作者：Ralf Notz^a ; ¹ ; Inga Tö ; nnies^b ; Hari Prasad Mangalapally^b ; Sebastian Hoch^b ; Hans Hasse^b ; ^{hans.hasse@mv.uni-kl.de"" rel=""nofollow}
• 关键词：Short-cut method ; CO₂ capture ; Absorption ; Kremser equation ; New solvents ; Equilibrium stage model
• 刊名：International Journal of Greenhouse Gas Control
• 出版年：2011
• 出版时间：May 2011
• 年：2011
• 卷：5
• 期：3
• 页码：413-421
• 全文大小：566 K

文摘

A short-cut method for the estimation of the minimum regeneration energy and optimum solvent flow rate in post-combustion carbon dioxide capture by absorption is presented. It is developed for comparing solvents of which only little thermo-physical data is known. The closed absorber–desorber cycle is described by an equilibrium stage model (modified Kremser equation with discretized equilibrium curves). The method can be implemented in any mathematical toolbox or as stand-alone solution. The only required input is the solubility data at absorber and desorber conditions, the heat of absorption and heat capacities. The caloric data may be estimated. The method was applied to monoethanolamine (MEA) and two solvents from the EU-project CASTOR. Comparisons with experimental results from pilot-plant studies with MEA show that the method, despite its simplicity, gives reasonable results. The method should also be useful in other applications where absorbents, of which only little data is available, need to be screened.