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Stability of a Benzyl Amine Based CO 2 CaptureAdsorbent in View of Regeneration Strategies

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ABSTRACT

Inthis work, the chemical and thermal stability of a primary amine-functionalizedion-exchange resin (Lewatit VP OC 1065) is studied in view of thepotential options of regenerating this sorbent in a CO2 removal application. The adsorbent was treated continuously in thepresence of air, different O2/CO2/N2 mixtures, concentrated CO2, and steam, and then the remainingCO2 adsorption capacity was measured. Elemental analysis,BET/BJH analysis, Fourier transform infrared spectroscopy, and thermogravimetricanalysis were applied to characterize adsorbent properties. This materialwas found to be thermally and hydrothermally stable at high temperatures.However, significant oxidative degradation occurred already at moderatetemperatures (above 70 °C). Temperatures above 120 °C leadto degradation in concentrated dry CO2. Adding moistureto the concentrated CO2 stream improves the CO2-induced stability. Adsorbent regeneration with nitrogen strippingis studied with various parameters, focusing on minimizing the molesof purge gas required per mole of CO2 desorbed.

No MeSH data available.


SEM graph of Lewatit VP OC 1065.
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fig1: SEM graph of Lewatit VP OC 1065.

Mentions: The sorbent material usedin this study was obtained from Lanxess. It is a commercial adsorbentcontains polystyrene–divinylbenzene copolymer functionalizedwith aminomethylene groups.44 The externalmorphology was measured by scanning electron microscopy (SEM) namedJEOL JSM 6010LA; the result is shown in Figure 1 displaying the porous structure of the sample.The averaged pore volume, surface area, and pore radius of the IERare 0.2 cm3/g, 25 m2/g, and 38 nm, respectively.The adsorbent is spherical-bead like with diameter between 0.3 and1 mm. The molar concentration of N is 7.5 mol/kg, measured by Alesiet al.45 via energy-dispersive X-ray spectroscopy(EDS).


Stability of a Benzyl Amine Based CO 2 CaptureAdsorbent in View of Regeneration Strategies
SEM graph of Lewatit VP OC 1065.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5384483&req=5

fig1: SEM graph of Lewatit VP OC 1065.
Mentions: The sorbent material usedin this study was obtained from Lanxess. It is a commercial adsorbentcontains polystyrene–divinylbenzene copolymer functionalizedwith aminomethylene groups.44 The externalmorphology was measured by scanning electron microscopy (SEM) namedJEOL JSM 6010LA; the result is shown in Figure 1 displaying the porous structure of the sample.The averaged pore volume, surface area, and pore radius of the IERare 0.2 cm3/g, 25 m2/g, and 38 nm, respectively.The adsorbent is spherical-bead like with diameter between 0.3 and1 mm. The molar concentration of N is 7.5 mol/kg, measured by Alesiet al.45 via energy-dispersive X-ray spectroscopy(EDS).

View Article: PubMed Central - PubMed

ABSTRACT

Inthis work, the chemical and thermal stability of a primary amine-functionalizedion-exchange resin (Lewatit VP OC 1065) is studied in view of thepotential options of regenerating this sorbent in a CO2 removal application. The adsorbent was treated continuously in thepresence of air, different O2/CO2/N2 mixtures, concentrated CO2, and steam, and then the remainingCO2 adsorption capacity was measured. Elemental analysis,BET/BJH analysis, Fourier transform infrared spectroscopy, and thermogravimetricanalysis were applied to characterize adsorbent properties. This materialwas found to be thermally and hydrothermally stable at high temperatures.However, significant oxidative degradation occurred already at moderatetemperatures (above 70 °C). Temperatures above 120 °C leadto degradation in concentrated dry CO2. Adding moistureto the concentrated CO2 stream improves the CO2-induced stability. Adsorbent regeneration with nitrogen strippingis studied with various parameters, focusing on minimizing the molesof purge gas required per mole of CO2 desorbed.

No MeSH data available.