Thermal regeneration of alkanolamine solutions in a rotating packed bed

A review: Desorption of CO 2 from rich solutions in chemical absorption processes

“…Instead of using a conventional packed bed, thermal regeneration of rich amine solutions in a rotating packed bed (RPB) was studied (Cheng et al, 2013). They examined two types of solutions: a 30 wt% MEA aqueous solution and a blend of 20 wt% DEA + 10 wt% PZ.…”

Carbon dioxide capture characteristics from flue gas using aqueous 2-amino-2-methyl-1-propanol (AMP) and monoethanolamine (MEA) solutions in packed bed absorption and regeneration columns

“…Based on heat capacity and heat of desorption data available in the literature (Cheng et al, 2013;Svendsen, 2007, 2011;Kuusela and J, 2010). The heat duty of the reboiler for 30 wt% of loaded MEA (0.43 mol CO 2 /mol amine) and 30 wt% of loaded AMP (0.55 mol CO 2 /mol amine) solutions were calculated to be 3.6 and 2.1 MJ/kg CO 2 , respectively.…”

“…They prevailed that the prepared model can represent different properties like binary and ternary VLE and composition over a wide range of temperatures, concentrations and loadings. Cheng et al (2013) have found that the regeneration efficiency of a conventional packed bed could be achieved by an RPB (rotating packed bed) apparatus that was very small in volume compared to conventional packed bed and also consumed less energy per unit tonne of CO 2 that was desorbed from an aqueous alkanolamine solution. Afkhamipour and Mofarahi (2013) compared with the simulated result between rate-based and equilibrium-stage models of a packed column for post combustion CO 2 capture using AMP solution and found that rate-based model gives a better prediction of the temperature and concentration profiles compared to equilibrium-stage model.…”

Process modelling, validation and analysis of rotating packed bed stripper in the context of intensified CO2 capture with MEA

“…In the case of RPB stripper, there is only one study which is performed by Joel et al [26]. [27] and data of Cheng et al [5] are used to validate their model. After the validation of the model, they performed process analysis.…”

“…Three important strategies have been used to decrease the energy requirement of stripper (a) development of new solvents or improvement of existing solvents by adding other solvents (solvent mixtures) [4]; (b) improvement of the process (e.g. by increasing mass and heat transfer by using RPB) [5], membrane [6] or changing the process configuration [7]); (c) optimization of operating parameters of the process (e.g. CO2 loading and solvent concentration) [8].…”