Ultra-thin enzymatic liquid membrane for CO₂ separation and capture.

ABSTRACT: The limited flux and selectivities of current carbon dioxide membranes and the high costs associated with conventional absorption-based CO₂ sequestration call for alternative CO₂ separation approaches. Here we describe an enzymatically active, ultra-thin, biomimetic membrane enabling CO₂ capture and separation under ambient pressure and temperature conditions. The membrane comprises a ~18-nm-thick close-packed array of 8 nm diameter hydrophilic pores that stabilize water by capillary condensation and precisely accommodate the metalloenzyme carbonic anhydrase (CA). CA catalyzes the rapid interconversion of CO₂ and water into carbonic acid. By minimizing diffusional constraints, stabilizing and concentrating CA within the nanopore array to a concen

SUBMITTER: Fu Y 

PROVIDER: S-EPMC5841395 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature