Postcombustion CO₂ capture using diethylenetriamine (DETA) solvent in a pilot‐plant test bed compared to monoethanolamine (MEA) solvent

Abstract

The performance of CO 2 absorption into diethylenetriamine (DETA) solvent and CO 2 desorption from rich DETA solvent were experimentally investigated in a lab‐scale CO 2 capture test bed. And the results were compared with monoethanolamine (MEA) solvent, which is a standard solvent for CO 2 capture in industry. Also, effects of solvent concentration, lean CO 2 loading, lean solvent temperature, solvent flow rate and flue gas flow rate on the absorption performance of DETA and MEA solvent, and effects of lean CO 2 loading and solvent flow rate on the regeneration performance of DETA and MEA solvent were studied. The results showed that DETA had a faster CO 2 absorption rate and a higher CO 2 cyclic capacity than MEA solvent. And to strip the same amount of CO 2 , DETA needed less regeneration energy than MEA solvent. In addition, the results also showed that key operating parameters of absorber and stripper had large effects on the performance of CO 2 absorption and desorption. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1131–1138, 2017