Mesoporous TiO2 as the support of tetraethylenepentamine for CO2 capture from simulated flue gas

摘要: Mesoporous TiO2 (MT) was prepared by a hydrothermal method and used as the supporting material for immobilization of tetraethylenepentamine (TEPA) to develop new type adsorbent CO2 capture from flue gas. The adsorption capacity increases with increase TEPA loading amounts. With maximum 31 wt% onto MT sorbent, reached 2.52 mmol g−1 sorbent. In presence an appropriate amount water vapor, formation bicarbonate hydroxylated surface on can improve 2.64 2.91 g−1. However, excess vapor leads decrease in 2.65 g−1, probably attributed competition between CO2. absorption/regeneration cycle repeated decreased 2.41 over 5 cycles, almost completely maintained its original capacity. addition, effect long-term storage is studied. After approximately one year storage, MT–TEPA-31 28% compared fresh sample.