Amine-bearing activated rice husk ash for CO2 and H2S gas removals from biogas

Abstract

In this study, Triamine–grafted activated rice husk ash (TRI-A-RHA) material was investigated in the CO₂ and H₂S removals from biogas. TRI-A-RHA was synthesized by deposition of Triamine chemical onto the surface of activated rice husk ash support. The TRI-A-RHA exhibited high CO₂ and H₂S adsorption capacities (of ~ 0.34 and 0.14 mmol.g^-1, respectively) and stabilities at room temperature condition. These could be the TRI-A-RHA adsorbent had high BET surface area and amine functionalization. These findings are suitable for acid separation from natural gas.