Regenerable magnesium-based sorbent for high-pressure and moderate-temperature CO2 capture: Physicochemical structures and capture performances

摘要: Abstract The CO 2 capture for a kind of magnesium-based sorbent from commercially available materials was carried out under high pressures (up to 2.5 MPa) and moderate temperatures (200–400 °C). Simultaneously, the evolutions its physicochemical structures during cyclic were analyzed by an X-ray Diffractometer (XRD), thermo-gravimetric analyzer (TGA), scanning electron microscope coupled with detection (SEM/EDS), surface area pore structure analyzer. For this unique active component Mg(OH) , components pure compound initial calcination followed hydroxylation carbonated respectively produce crystalline amorphous MgCO 3 capture. importantly altered relatively small pores into large in sorbent, step necessary, favorable critical higher capacity sorbent. Although H S feed gas could cause important decreasing capacity, it hardly affected stability. As whole, prepared suitable removal regardless presence temperatures.