Fig. 1
From: Oxidation-stable amine-containing adsorbents for carbon dioxide capture
Synthesis of oxidation-stable CO2 adsorbent. PEI was functionalized with 1,2-epoxybutane (EB), which generates tethered 2-hydroxybutyl groups. Small amounts of chelators were also pre-supported into a silica support to poison p.p.m.-level metal impurities in the polymeric amines that can catalyse the oxidative degradation of amines
