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The aim is to assess the effectiveness of hydrotalcite-derived sorbents for CO2 capture under varying conditions in a dynamic PSA setup.

March 4, 2026Clean TechnologiesOpen Access

CO2 Capture by Hydrotalcite-Derived Sorbents in Pressure Swing Adsorption for Sorption-Enhancing

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This work investigates CO2 capture performance of hydrotalcite-derived sorbents, suggesting their potential use in hydrogen production.

The aim is to assess the effectiveness of hydrotalcite-derived sorbents for CO2 capture under varying conditions in a dynamic PSA setup.
Evaluated hydrotalcite-derived sorbents under conditions of 350 °C, 10 or 14 bar, and 38.5 vol% CO2.
Conducted experiments in a packed-bed laboratory reactor using dynamic pressure swing adsorption.
Compared two sorbents: commercial hydrotalcite and synthesized hydrotalcite, both doped with 20 wt% K2CO3.
Assessed performance under wet and dry gas flow conditions.
K2CO3-doping and higher pressures improved CO2-sorption capacity significantly.
Maximum CO2 capture of 1.51 mmolCO2∙g−1 was recorded at 14 bar under wet conditions.
The bifunctional catalyst-sorbent demonstrated stable CO2 sorption capacity of 1.39 mmolCO2∙gsolid−1 across five PSA cycles.

Malsegna et al. (2026) studied this question.

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