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DECAB: process development of a phase change absorption process

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Author: Sanchez Fernandez, E. · Goetheer, E.L.V.
Source:10th International Conference on Greenhouse Gas Control Technologies, 19-23 September 2010, Amsterdam, Netherlands, 4, 868-875
Energy Procedia
Identifier: 429715
Keywords: Energy · Conceptual design · Phase change solvents · Refinery flue gas treatment · Absorption process · Design method · Economic evaluations · Environmental friendliness · Le chatelier's principles · Literature data · Low energy consumption · Lower vapor pressure · NO emissions · Novel separation process · Phase Change · Potassium salts · Process development · Reaction equilibrium · Refinery flue gas treatment · Absorption · Air pollution · Amino acids · Conceptual design · Energy utilization · Flue gases · Flues · Global warming · Greenhouse gases · Refining · Solvents · High Tech Systems & Materials · Industrial Innovation · Fluid Mechanics Chemistry & Energetics · GTR - Gas Treatment · TS - Technical Sciences


This work describes the conceptual design of a novel separation process for CO2 removal from flue gas based on precipitating solvents. The process here described (DECAB) is an enhanced CO2 absorption based on the Le Chatelier's principle, which states that reaction equilibrium can be shifted by removing one of the constituents in the reaction. A conceptual design of this process has been developed based on literature data, thermodynamic principles and a limited number of experiments. As solvent example, the potassium salt of taurine was selected. The strategy followed is based on the compilation and determination of the key properties and parameters that govern the absorption and regeneration of the solvent. Then, the performance of the process is evaluated with the aid of short cut design methods. Results show that the key advantages of this process are environmental friendliness (no emissions to the air) and low energy consumption related to a lower vapor pressure of the solvent and higher net loading than conventional processes. The design developed allows for future economic evaluation and assessment of options that will further lead to benefits over conventional processes. © 2011 Published by Elsevier Ltd.