posted on 2023-12-07, 21:22authored byJ. Mark Young, Sam H. McCalmont, Sophie Fourmentin, Panagiotis Manesiotis, John D. Holbrey, Leila Moura
High-precision measurement
of gas uptake from single or mixed feeds
in solid and liquid sorbents traditionally requires time-consuming
experimental procedures and/or complex and costly equipment. A simple
and cost-effective headspace gas chromatography (HS-GC) approach for
the fast, universal experimental screening of sorbents for gas uptake
and/or determination of their real gas separation selectivity has
been developed and is demonstrated for pressures up to 2500 mbar and
temperatures above 30 °C. This method allows screening of solids
and both volatile and nonvolatile liquid materials, physisorbents,
and chemisorbents using both single and mixed permanent gases that
can include CO2, CH4, H2, and NH3, for gas uptakes as low as 0.04 mmol or 1.8 mg of CO2. We estimate that this method allows for the screening of
at least 30–96 sorbents (in triplicate) or 90–264 sorbents
(singles) per day, representing at least a 90–3000 times reduction
in the time required for equivalent analysis.