Synthesis of Sodium Carbonate Based Solid Adsorbents and Their CO2 Adsorption Performance

Abstract

Porous carbon is considered a promising adsorbent for carbon capture and sequestration, and pore structure and surface activity must be optimized in order to achieve high capture capacity and recycling performance. In this study, terephthalic acid and sodium hydroxide were used as raw materials to prepare sodium carbonate based porous carbon and metal oxide composites at TPA:NaOH:X(X = MgO, CaO, MgO/CaO, Mg(NO₃)2,C, and Al₂O₃) = 1:1:2 and 600 °C. The analysis results show that the material MgO/Na₂CO₃ has the best CO₂ adsorption capacity, and the adsorption capacity is 10.56cm³/g at 0 °C and 1 bar. The material Al₂O₃/Na₂CO₃ has the best thermal stability, and the MgO/Na₂CO₃ shows good recycling performance in the five cycle test. The high-temperature calcination process makes the mesoporous structure of the material form, which makes the carbon composites show good capture performance, and sodium carbonate based solid adsorbents have good development and application prospects as CO₂ capture and separation materials.