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Synergistic design of multi-metallic Fe-based oxygen carriers for microwave-assisted chemical looping gasification of municipal sewage sludge

Author

Listed:
  • Yang, Panbo
  • Wu, Sian
  • Yan, Xiaoyu
  • Yan, Hangyu
  • Zhao, Shuheng
  • Dang, Jiatao
  • Wang, Wei
  • Wang, Kaixin
  • Hu, Jianjun

Abstract

Efficient and low-carbon valorization of municipal sewage sludge (MSS) is crucial for sustainable waste management. This study evaluates 19 oxygen carriers (OCs), ranging from single-metal to Fe-based binary, ternary, and quaternary multi-metallic OCs (FeMe1, FeMe1Me2, FeMe1Me2Me3; Me = Cr, Mn, Co, Ni), for microwave-assisted chemical looping gasification of MSS. Results reveal that synergistic interactions among metals significantly enhance microwave absorption capacity, redox activity, and cyclic stability. FeMnCo OC exhibits superior performance, achieving the highest syngas yield with H2 and CO selectivity of 41.47% and 20.19%, respectively, while inhibiting CO2 and CH4 formation. Its high lattice oxygen proportion (41.0%) facilitates selective partial oxidation, enabling regulation of the H2/CO ratio, and achieves a carbon conversion efficiency (CCE) of 35.05%. This study proposes a design strategy for multi-metallic OCs and further promotes efficient and low-carbon sludge valorization via the integrated “microwave absorption-catalysis-gasification” mechanism.

Suggested Citation

  • Yang, Panbo & Wu, Sian & Yan, Xiaoyu & Yan, Hangyu & Zhao, Shuheng & Dang, Jiatao & Wang, Wei & Wang, Kaixin & Hu, Jianjun, 2026. "Synergistic design of multi-metallic Fe-based oxygen carriers for microwave-assisted chemical looping gasification of municipal sewage sludge," Energy, Elsevier, vol. 348(C).
    • Handle: RePEc:eee:energy:v:348:y:2026:i:c:s0360544226006985
    DOI: 10.1016/j.energy.2026.140595
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