Simulated moving bed adsorption process based on a polyethylenimine-silica sorbent for CO2 capture with sensible heat recovery

Oxidation‐Resistant, Cost‐Effective Epoxide‐Modified Polyamine Adsorbents for CO2 Capture from Various Sources Including Air

“…A following paper by the same group also showed the good stability of these adsorbents under oxidative conditions . In parallel, Lee and co‐workers also studied the same adsorbent materials based on BPEI and BO on silica . However, as pointed out above, BPEI remains relatively expensive compared with its shorter homologues, which would thus be better choices from an economic point of view.…”

“…[36] In parallel, Lee and co-workers also studied the same adsorbent materials based on BPEI andB Oo ns ilica. [37][38][39] However, as pointed out above,B PEI remains relatively expensive compared with its shorter homologues, which would thus be better choicesf rom an economic point of view.I nap atent application from early 2016, we disclosed the reaction of these ethylenimine oligomers, including PEHA and TEPA, with epoxides and their impregnationo ns olid supports to afford solid CO 2 sorbents. [40] The superiority of these amine-epoxide based adsorbentsf or CO 2 capture applications compared with their unmodified counterparts in terms of stability,d esorption kinetics, heat of adsorption, and so on is hereafter demonstrated.…”

Anion identification using silsesquioxane cages

“… 2 For example, amine groups appended to the silica surface allow for chemical adsorption of CO 2 , which generates a chelating group allowing sequestration of metal ions. 3 , 4 Interestingly, the mode of adsorption for organic molecules by silica is still controversial. While a mechanism has been postulated 5 and the outstanding capacity and absorptivity properties of silica are well-known, 6 , 7a very few studies have been devoted to determine the actual role of silica in the adsorption of organic species.…”

Energy dissipation evaluation of temperature swing adsorption (TSA) cycle based on thermodynamic entropy insights

“…The adsorption capacity of adsorbent is primarily affected by temperature in a TSA cycle, thus the energy required in the pre-cooling and pre-heating steps account for the major part, which both contribute to 43.79%, the similar trend is also obtained in the ref. 17 . Thus such cycle can be integrated with IHR method for the potential of sensible heat recovery, which would be researched in this work as well.…”

“…2. Considering that the heat transfer temperature difference is needed in the heat recovery exchanger, the minimum temperature difference between the working fluid in these two bed could be defined as the minimum temperature approach T m 17 . With the minimum temperature approach T m defined, the T 5 and T 6 can be expressed as Eqs 1 and 2.…”