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Switchable hydrophilicity solvents for carbon dioxide chemical absorption
Mario Carrera,Diego Gómez-Díaz,José M. Navaza 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.59 No.-
The development of more efficient solvents for carbon dioxide capture is the main aim of present work by using a gas–liquid–liquid (GLL) reactor. This type of reactor is based on the use of switchable hydrophilicity solvents. This type of solvents tries to maintain a constant driving force and decreasing the amount of solvent to be regenerated. N-ethylpiperidine solvent shows an increase in absorption rate in GLL configuration and reduce the costs of regeneration in a 30%. Triethylamine solvent shows worst results in absorption tests and it suffers high degradation. The use of bicarbonate separation by precipitation for solvent regeneration contributes suitable results.
Characterization of carbon dioxide capture by glucosamine: Liquid phase speciation and degradation
Alicia Garcı´a-Abuı´n,Diego Go´ mez-Dı´az,Jose´ M. Navaza 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Carbon dioxide capture by chemical absorption can be improved attending to the reaction mechanism due to the different stoichiometry shown by the most important reactions (mainly production of bicarbonate/carbonate ion, and carbamate) involved in the process. The weight of each reaction upon the carbon dioxide absorption determines the loading value and the rate of amine consumption which can influence upon reaction rate. On the other hand, the degradation rate of amines during the regeneration step can play a very important role in carbon dioxide separation process increasing the amount of amine make-up flow-rate.
A.B. Lo´ pez,M.D. La Rubia,J.M. Navaza,R. Pacheco,D. Go´ mez-Dı´az 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The carbon dioxide absorption process by 1-amino-2-propanol (MIPA) and bis(2-hydroxypropyl)amine(DIPA) aqueous solutions in bubble column reactor have been studied considering the influence of liquidphase physical properties and the amine group substitution on the overall process. Themain objective ofthis work was to establish the carbon dioxide capture reaction mechanism for these systems, and then toobtain the predominant stoichiometry to calculate the mass transfer coefficient. NMR technique wasused to determine the species present in the liquid phase during the absorption process and to confirmthe reaction mechanism. The degradation of these amines was also evaluated.