Oxygen carriers from incineration bottom ash for chemical looping combustion of syngas: effect of composition on combustion efficiency
| Autor: | Ke Yin, Wenqian Chen, Dara Khairunnisa Binte Mohamed, Grzegorz Lisak, Guicai Liu, Andrei Veksha, Stephan Heberlein, Haiming Wang, Xiaomin Dou |
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| Přispěvatelé: | School of Civil and Environmental Engineering, Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Centre |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering Iron oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry Combustion 01 natural sciences Oxygen Industrial and Manufacturing Engineering chemistry.chemical_compound Environmental Chemistry Oxygen Transfer Capacity Oxygen transport General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering Environmental engineering::Waste management [Engineering] Fluidized bed Bottom ash 0210 nano-technology Chemical looping combustion Incineration Bottom Ashes Syngas |
| Popis: | Incineration bottom ashes (IBA) were investigated as oxygen carriers (OCs) for their application in chemical looping combustion (CLC). The OCs were prepared by mixing the magnetic separated fraction of IBA (IMF) with its non-magnetic fraction (NMF) at various ratios. Additionally, a synthesized iron oxide supported on the pre-washed IBA (0, 25, 50 and 75 wt%), termed as synFe, were also investigated for comparison with the investigated IMF. Thermogravimetric analysis (TGA) combined with elemental analysis unveiled that Fe2O3 and CaSO4 in IMFs were the major sources of the available lattice oxygen in the investigated oxygen carriers. A synergistic effect was observed among the complex components in IMF-based OCs causing the experimental oxygen transport capacity to be larger than the theoretically expected, calculated based on the metal oxides (including Fe2O3, CuO, Mn2O3 and NiO) and CaSO4 redox couples. A syngas (H2 + CO) combustion tests with the IMF-based OCs in a bench-scale fluidized bed reactor were conducted, where the100-IMF demonstrated the most pronounced and stable combustion performance (95% for H2 and 90% for CO), comparable to those delivered by 50% and 75% synFe. Based on this study, the IMF compounds from the raw IBA without any further treatment carry a high potential for CLC process, which provides possible option of a cost-effective OCs and sustainable application of IBA. Economic Development Board (EDB) Ministry of the Environment and Water Resources National Environmental Agency (NEA) This research is supported by the National Environment Agency, Ministry of the Environment and Water Resources, Singapore, under the Waste–to–Energy Competitive Research Programme (WTE CRP 1701 105). The research is also partially funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD). The authors acknowledge the management of Nanyang Environment and Water Research Institute and Economic Development Board, Singapore for the support. |
| Databáze: | OpenAIRE |
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