Experimental Study of the novel high-efficiency SrO CeO2 adsorbent for cyclic CO2 capture
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With increasing global attention on environmental protection, reducing CO2 emissions from shipping is urgent. This studyexplores post-combustion CO2 capture using adsorbents for marine exhaust. A SrO-based CO2 adsorbent supported by CeO2was prepared via sol-gel method, and its cyclic adsorption capacity was tested through fixed-bed experiments. The impact ofdopants, carbonation temperature, and CO2 concentration on adsorption performance was studied, and the microstructurewas analyzed using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS),and Brunauer-Emmett-Teller (BET). Results show that Ce-2SrO demonstrates excellent performance and stability at 880 ℃and 950 ℃ under adsorption-desorption conditions, retaining about 93% CO2 adsorption efficiency after 20 cycles. SEM andEDS reveal that CeO2 is evenly distributed within SrO pores, enhancing pore structure stability, adsorption capacity, andresistance to sintering. SrO-based adsorbents show excellent thermal sintering resistance due to CeO2. Additionally, CeO2promotes ion migration during carbonation, helping maintain adsorption activity. This study presents a novel approach forsynthesizing efficient, stable CO2 adsorbents and offers a new strategy for marine carbon capture.
Abstract
With increasing global attention on environmental protection, reducing CO2 emissions from shipping is urgent. This studyexplores post-combustion CO2 capture using adsorbents for marine exhaust. A SrO-based CO2 adsorbent supported by CeO2was prepared via sol-gel method, and its cyclic adsorption capacity was tested through fixed-bed experiments. The impact ofdopants, carbonation temperature, and CO2 concentration on adsorption performance was studied, and the microstructurewas analyzed using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS),and Brunauer-Emmett-Teller (BET). Results show that Ce-2SrO demonstrates excellent performance and stability at 880 ℃and 950 ℃ under adsorption-desorption conditions, retaining about 93% CO2 adsorption efficiency after 20 cycles. SEM andEDS reveal that CeO2 is evenly distributed within SrO pores, enhancing pore structure stability, adsorption capacity, andresistance to sintering. SrO-based adsorbents show excellent thermal sintering resistance due to CeO2. Additionally, CeO2promotes ion migration during carbonation, helping maintain adsorption activity. This study presents a novel approach forsynthesizing efficient, stable CO2 adsorbents and offers a new strategy for marine carbon capture.