Engineering Amine-Containing Adsorbents for Efficient Carbon Dioxide Capture in Closed-Circuit Escape Respirators.

ABSTRACT: In emergencies involving oxygen deficiency or exposure to toxic gases, closed-circuit escape respirators (CCERs) provide prompt and reliable respiratory protection, enabling safe escape from hazardous environments. These devices utilize a self-contained system that recycles exhaled breath by scrubbing CO₂ and replenishing O₂. CCERs require efficient CO₂ adsorbents, as excessive CO₂ accumulation from exhalation can lead to hypercapnia, causing dizziness, confusion, or even loss of consciousness. This study demonstrates that 1,2-epoxybutane-functionalized polyethylenimine supported on gamma alumina (EB-PEI/γ-Al₂O₃) is a very promising CO₂ adsorbent for CCERs, significantly outperforming the conventionally used soda

SUBMITTER: Park Y 

PROVIDER: S-EPMC12308419 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature