Evaluating Autoxidation Radical Scavengers and Additives to Enhance Aminopolymer Sorbent Stability.

ABSTRACT: Solid amine sorbents have shown promise in the removal of ultradilute CO₂ from the atmosphere. Despite being a promising candidate material type for this application, these sorbents are prone to degradation during long-term exposure to environmental components such as CO₂, O₂, and H₂O, with amine oxidation being a particularly challenging problem. In this study, we investigate the potency of different radical scavengers and additives in mitigating the degradation of a model poly-(ethylenimine) (PEI)/Al₂O₃ sorbent under direct air capture (DAC)-relevant conditions. The results reveal that a 4,4'-bis-(α,α-dimethylbenzyl)-diphenylamine (BDDPA)-incorporated PEI/Al₂O₃ sorbent showed the most resistance towar

SUBMITTER: Guta YA 

PROVIDER: S-EPMC12703673 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature