Chemical Engineering Research and Design | VOL. 153
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Short-cut method for assessing solvents for gas cleaning by reactive absorption

Publication Date Jan 1, 2020

Abstract

Abstract A new short-cut method (NoVa) for assessing solvents for gas cleaning by reactive absorption is presented. It considers the absorption / desorption cycle using the assumption of infinite number of stages in both columns. For a given feed and removal rate, the method yields an estimate for the specific regeneration energy q as a function of the solvent circulation rate L/G. The sole solvent-dependent input consists of two correlations describing the gas solubility at absorber and desorber conditions and estimates of caloric properties. Furthermore, a simple equation (SolSOFT) for correlating the gas solubility as a function of the gas loading of the solvent is presented. A theoretical analysis of the process reveals general properties of the dependency of q on L/G. The NoVa method is described and tested using amine-based solvents for post combustion carbon capture as examples.

Concepts
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Reactive Absorption
Short-cut Method
Solvents For Carbon Capture
Desorption Cycle
Gas Solubility
Solvents For Capture
Simple Equation
Removal Rate
Estimate For Energy
Feed Rate

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