(377h) Assessing the Stability of Amine-Based Hollow Fiber Sorbents to Flue Gas Impurities in Post-Combustion CO2 Capture
AIChE Annual Meeting
Tuesday, November 18, 2014 - 5:21pm to 5:39pm
For amine-based hollow fiber sorbents to be useful in practical CO2 capture applications, it is crucial to exhibit a stable performance and a long lifetime in the presence of flue gas impurities. In our earlier investigation,1 we studied the stability of supported amine sorbents to SOx and NOx gas impurities. Here, as a next step, the stability of amine-containing polymer/silica hollow fiber sorbents to SO2, NO and NO2 impurities during CO2 capture is evaluated by conducting cyclic adsorption – desorption experiments in a rapid temperature swing adsorption process. Fiber sorbents containing primary, secondary, and tertiary amine moieties are exposed to different gas mixtures, comprising SO2/CO2, NO/CO2 and NO2/CO2 using different SOx and NOx concentrations. Furthermore, to assess any synergies in co-adsorption of SOx or NOx and CO2 gases, multi-component adsorption measurements are carried out using a mixture of SO2/NO/CO2, in addition to the binary-component adsorption measurements listed above. The dynamic cyclic CO2 capacities of the hollow fiber sorbents are measured accordingly to evaluate any capacity loss over120 cycles due to irreversible binding of SO2, NO or NO2 to the amine sites.
(1) Rezaei, F.; Jones, C. W. Ind. Eng. Chem. Res. 2013, 52, 12192.