Strategies for high-temperature methyl iodide capture in azolate-based metal-organic frameworks.

ABSTRACT: Efficiently capturing radioactive methyl iodide (CH₃I), present at low concentrations in the high-temperature off-gas of nuclear facilities, poses a significant challenge. Here we present two strategies for CH₃I adsorption at elevated temperatures using a unified azolate-based metal-organic framework, MFU-4l. The primary strategy leverages counter anions in MFU-4l as nucleophiles, engaging in metathesis reactions with CH₃I. The results uncover a direct positive correlation between CH₃I breakthrough uptakes and the nucleophilicity of the counter anions. Notably, the optimal variant featuring SCN^- as the counter anion achieves a CH₃I capacity of 0.41 g g^-1 at 150 °C under 0.01 bar, surpassing all previously reported

SUBMITTER: Pan T 

PROVIDER: S-EPMC10960856 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature