A Facile Starch‐Assisted Sol–Gel Method to Synthesize K‐Doped
2 Li 3 Sorbents with Excellent ZrO 2
A facile starch‐assisted sol–gel method combined with freeze‐drying technique has been developed to synthesize
‐doped K 2 Li 3
sorbents. ZrO SEM, TEM, and XRD techniques have been applied to characterize the morphology and structure of the synthesized ‐doped K 2 Li 3
samples. The ZrO 2 capture‐regeneration properties of the prepared CO ‐doped K 2 Li 3
sample were investigated using thermogravimetric analysis at different ZrO 2 partial pressures. The CO ‐doped K 2 Li 3
synthesized using the starch‐assisted sol–gel method combined with the freeze‐drying technique shows excellent ZrO 2 capture properties. At 823 K and a CO CO2 partial pressure of 0.25 bar,
the uptake of CO2 reaches 22 wt% within 20 min, which is approximately 87% of the stoichiometric sorption capacity (25.3 wt%) of 2 in the CO ‐doped
K 2 Li 3 with a ZrO : K : Li composition of 0.2:1.6:1 in molar ratio.
Furthermore, the sorbent shows a good stability, confirmed using capture‐regeneration cycles.
No Supplementary Data
No Article Media
Document Type: Research Article
Publication date: 2012-05-01