How do CaO/CuO materials evolve in integrated calcium and chemical looping cycles?
Maintaining high CO2 uptake is critical for combined Ca-Cu looping applications, however, the long-term behaviour of combined Ca and Cu materials under repeated cycling conditions remains less understood. This study examined three materials with a fixed Cu/Ca mole ratio of 1.6 to analyse the materia...
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Elsevier
2025-06-01
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| Series: | Carbon Capture Science & Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772656825000296 |
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| author | Yaoyao Zheng Stuart A. Scott |
| author_facet | Yaoyao Zheng Stuart A. Scott |
| author_sort | Yaoyao Zheng |
| collection | DOAJ |
| description | Maintaining high CO2 uptake is critical for combined Ca-Cu looping applications, however, the long-term behaviour of combined Ca and Cu materials under repeated cycling conditions remains less understood. This study examined three materials with a fixed Cu/Ca mole ratio of 1.6 to analyse the material phase evolution and identify factors influencing CO2 uptake. The materials underwent 50 TGA cycles in two distinct looping applications: blast furnace gas (BFG) cycling (reduction-carbonation-oxidation) and flue gas cycling (carbonation-reduction-oxidation).Different preparation methods significantly affected the initial phase distribution. The multi-grain precipitate material (MGP), prepared to minimise the chemical contact between Ca and Cu, primarily contained separate CaO and CuO phases; while the multi-stage mechanically mixed materials (MM1 and MM2), in which there was extensive contact between the Ca and Cu, exhibited mixed Ca-Cu-O phases along with separate CuO. However, the initial phase distribution had little influence on the longer-term CO2 uptake with the accessibility of CaO and cycling conditions having a more significant impact. BFG cycling consistently resulted 70–100; % greater CO2 uptake than flue gas cycling, highlighting the strong influence of cycling conditions. |
| format | Article |
| id | doaj-art-bffe8adeb18b4e3f82c01fa84c518019 |
| institution | DOAJ |
| issn | 2772-6568 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Carbon Capture Science & Technology |
| spelling | doaj-art-bffe8adeb18b4e3f82c01fa84c5180192025-08-20T03:21:16ZengElsevierCarbon Capture Science & Technology2772-65682025-06-011510038910.1016/j.ccst.2025.100389How do CaO/CuO materials evolve in integrated calcium and chemical looping cycles?Yaoyao Zheng0Stuart A. Scott1University of Cambridge, Engineering Department, Cambridge, UK; University of Nottingham, Faculty of Engineering, Nottingham, UK; Corresponding author at: Faculty of Engineering, University of Nottingham, Nottingham, UK.University of Cambridge, Engineering Department, Cambridge, UKMaintaining high CO2 uptake is critical for combined Ca-Cu looping applications, however, the long-term behaviour of combined Ca and Cu materials under repeated cycling conditions remains less understood. This study examined three materials with a fixed Cu/Ca mole ratio of 1.6 to analyse the material phase evolution and identify factors influencing CO2 uptake. The materials underwent 50 TGA cycles in two distinct looping applications: blast furnace gas (BFG) cycling (reduction-carbonation-oxidation) and flue gas cycling (carbonation-reduction-oxidation).Different preparation methods significantly affected the initial phase distribution. The multi-grain precipitate material (MGP), prepared to minimise the chemical contact between Ca and Cu, primarily contained separate CaO and CuO phases; while the multi-stage mechanically mixed materials (MM1 and MM2), in which there was extensive contact between the Ca and Cu, exhibited mixed Ca-Cu-O phases along with separate CuO. However, the initial phase distribution had little influence on the longer-term CO2 uptake with the accessibility of CaO and cycling conditions having a more significant impact. BFG cycling consistently resulted 70–100; % greater CO2 uptake than flue gas cycling, highlighting the strong influence of cycling conditions.http://www.sciencedirect.com/science/article/pii/S2772656825000296Chemical loopingCalcium loopingBlast furnace gasFlue gasCaO/CuO |
| spellingShingle | Yaoyao Zheng Stuart A. Scott How do CaO/CuO materials evolve in integrated calcium and chemical looping cycles? Carbon Capture Science & Technology Chemical looping Calcium looping Blast furnace gas Flue gas CaO/CuO |
| title | How do CaO/CuO materials evolve in integrated calcium and chemical looping cycles? |
| title_full | How do CaO/CuO materials evolve in integrated calcium and chemical looping cycles? |
| title_fullStr | How do CaO/CuO materials evolve in integrated calcium and chemical looping cycles? |
| title_full_unstemmed | How do CaO/CuO materials evolve in integrated calcium and chemical looping cycles? |
| title_short | How do CaO/CuO materials evolve in integrated calcium and chemical looping cycles? |
| title_sort | how do cao cuo materials evolve in integrated calcium and chemical looping cycles |
| topic | Chemical looping Calcium looping Blast furnace gas Flue gas CaO/CuO |
| url | http://www.sciencedirect.com/science/article/pii/S2772656825000296 |
| work_keys_str_mv | AT yaoyaozheng howdocaocuomaterialsevolveinintegratedcalciumandchemicalloopingcycles AT stuartascott howdocaocuomaterialsevolveinintegratedcalciumandchemicalloopingcycles |