Carbon dioxide capture by aqueous glucosamine solutions: Pilot plant measurements and a theoretical study

A comprehensive investigation of the potential of aqueous glucosamine solutions as an eco-friendly solvent for CO2 capture was performed. It includes an experimental study in a pilot plant setup and a theoretical analysis with a rate-based model. The model was validated against the measured column profiles of temperature and CO2 concentration in both liquid and gas phases. Model-based parameter sensitivity studies revealed inherent challenges for an effective absorption process. A slow reaction rate and suboptimal chemical equilibrium conditions were identified as key limitations, restricting the absorption efficiency and CO2 loading capacity of the glucosamine solution. Furthermore, an analysis of the dissociation constant of this novel absorbent was performed and its significance with respect to the (limited) performance, capability, and efficiency evaluation was highlighted.