Combined Experimental and Theoretical Study of the Competitive Absorption of CO₂ and NO₂ by a Superbase Ionic Liquid.

ABSTRACT: A superbase ionic liquid (IL), trihexyltetradecylphosphonium benzimidazolide ([P₆₆₆₁₄][Benzim]), is investigated for the capture of CO₂ in the presence of NO₂ impurities. The effect of the waste gas stream contaminant on the ability of the IL to absorb simultaneously CO₂ is demonstrated using novel measurement techniques, including a mass spectrometry breakthrough method and in situ infrared spectroscopy. The findings show that the presence of an industrially relevant concentration of NO₂ in a combined feed with CO₂ has the effect of reducing the capacity of the IL to absorb CO₂ efficiently by ∼60% after 10 absorption-desorption cycles. This finding is supported by physical property analysis (viscosity,

SUBMITTER: Greer AJ 

PROVIDER: S-EPMC8296676 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature