Photoreactive Capture and Conversion of Dilute Carbon Dioxide into Synthetic Natural Gas.

ABSTRACT: This study introduces a photoreactive system that integrates the capture of dilute CO₂ streams with their catalytic conversion to synthetic natural gas (CH₄), utilizing a Ru nanoparticle (NP)-doped TiO₂ composite loaded with linear polyethylenimine (L-PEI) and enhanced with plasmonic titanium nitride (TiN). This light-driven approach mitigates challenges that have plagued traditional thermal reactive carbon capture (RCC) methods, such as CO₂ slip and amine degradation. We demonstrate that L-PEI enables stable CO₂ capture and conversion, achieving ∼70% conversion of captured CO₂ to CH₄ across multiple reaction cycles using nonflammable forming gas (∼5% H₂) as the reductant. In contrast, branched PEI (B-P

SUBMITTER: Halingstad S 

PROVIDER: S-EPMC12458456 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature