Absorption of Carbon Dioxide in a Bubble-Column Scrubber

Sustainable removal of N2O by mediated electrocatalytic reduction at ambient temperature electro-scrubbing using electrogenerated Ni(I) electron mediator

“…The overall mass transfer coefficient was approximately 0.017 s -1 . Although this cannot be compared directly with other studies on N2O due to the paucity of data in the literature, to contextualize the absorption rate determined in this study, this is analogous to the lower region of chemically reactive mass transfer recorded for CO2 separation in a similarly designed packed column technology [57]. The increasing resistance to mass transfer identified in the liquid phase could be solved by increasing the solvent recirculation…”

Membrane electrolysis-assisted CO2 and H2S extraction as innovative pretreatment method for biological biogas upgrading

“…The CO2 hydration reaction, yielding carbonic acid, is kinetically relatively slow (slower than the ionization of carbonic acid), and proceeds much faster at higher pH, as CO2 reacts directly with OHto form bicarbonate (hydroxylation reaction: CO2,aq + OH -= HCO3 -) [21]. The absorption rate of CO2 is strongly affected by the pH of the solution, since the Henry constant is a function of pH (affecting the solubility of CO2 in solution) [22]. Additionally, the mass transfer coefficient plays a major role in the absorption rate of CO2 [23], highlighting the need for the design of effective scrubbers (bubble column, sieve tray column, packed bed column) [24].…”

CO2 Capture and Crystallization of Ammonia Bicarbonate in a Lab-Scale Scrubber

“…At the interface, the relationship between the partial pressure of the CO 2 and the dissolution of the CO 2 in the liquid can be expressed by Harry's Law (P A = HC A ). According to this model, the absorption rate and overall mass transfer coefficient can be determined using measurable quantities [21]. into continuous contact with the aqueous ammonia solution flowing into the column from the top.…”

“…Regarding the bubble column, the absorption factor is 5 to 10 times that of the packed column of high-efficiency structured packing material, which indicates that under the same conditions, in order to obtain the same absorption factor, the volume of the packed column of high-efficiency structured packing material should be 5 to 10 times that of the bubble column; and while the volume of a conventional packed column, needs to be 130 times that of the bubble column to have the same absorption factor as the bubble column [21]. The above results show that the bubble column shows superior performance and many scholars use the bubble column as the absorber and object of study to this end [5,[22][23][24].…”