(703a) Development of Sodium-Borate Adsorbent for CO2 capture at High Temperature from Flue Gas Stream

Increasing CO₂ emissions to the atmosphere is critical due to the global warming issue. Developing CO₂ adsorbent at high temperature is of paramount importance as its widespread application. In this investigation, Sodium based Borate adsorbent has been developed for CO₂ capture process. Four different Sodium precursors have been utilized, mixed separately with Boric acid, and tested for CO₂ Adsorption simulated the flue gas stream condition. The materials have been tested under temperature range 550-700 ËšC and showed promising results especially between 650- 700 ËšC. The optimum CO₂ uptake for the proposed materials have shown as much as ~5.5 mmol/g. For further investigation, cyclic Adsorption-Desorption process has been tested at 650 and 7000 ËšC for Adsorption and 700 ËšC for Desorption. The materials showed high stability after eight consecutive Adsorption-Desorption cycle. Also, BET surface area, XRD, and SEM techniques have been performed for the proposed materials to study their physio-chemical properties. Such interesting materials that presented high CO₂ capture uptake, fast kinetic, and high stability materials that could be promising candidates for post combustion process.