Abstract
Abstract In order to understand how the modification of limestone by propionic acid affects the CO 2 capture performance, limestone was modified with propionic acid in this study. A thermo-gravimetric analyzer and a dual fixed-bed reactor were employed to investigate the CO 2 capture capacity of the modified limestone during cyclic calcination/carbonation reactions. The microstructure of the calcined modified limestone was examined by SEM and nitrogen physisorption tests. The results show that the modified limestone achieves faster carbonation rates and higher carbonation conversions than the untreated one during cyclic reactions. The carbonation conversion of the modified limestone is 0.31 after 100 cycles, 3.9 times as the carbonation conversion of the untreated one. The surface areas of the calcined modified limestone are higher than that of the calcined untreated one after the same cycles. For the calcined modified limestone, the pores distributed in 2–20 nm are more abundant than the untreated one, which contribute plenty of surface area for carbonation reactions. Therefore, the modified limestone can achieve higher carbonation conversions than the untreated one during cyclic reactions.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call