Mechanically stable mixed metal oxide of Cu and Mn as oxygen carrier for chemical looping syngas combustion

Sandra Sajen, Sunit Kumar Singh, Pallavi Mungse, Sadhana Rayalu, Kosuke Watanabe, Govindachetty Saravanan, Nitin Labhasetwar

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Chemical looping combustion possesses an inherent advantage of separation of CO2 from the carbon based fuels including thermal power plants that would offer effective mitigation of CO2 emissions through carbon capture and sequestration. In this study, a stable and regenerative mixed transition metal oxide of Cu and Mn (CuMn2O4) is synthesized through coprecipitation method and tested for multicycle performance for the oxidation of syngas as fuel. It was observed that 90% of the oxygen carrying capacity of CuMn2O4 can be utilized for the oxidation of syngas with almost 100% conversion efficiency in a packed bed reactor. The conversion efficiency of both CO and H2 was not altered significantly in all the tested cycles. CO2 and H2O were the sole products of syngas conversion. The phase of CuMn2O4 can be regenerated solely by aerial oxidation of the reduced products (Cu and MnO) at 800 °C. Utilization of maximum oxygen carrying capacity can reduce the circulation frequency of oxygen carrier between air and fuel fluidized bed reactors that can reduce the energy penalty significantly. The pelletized oxygen carrier possess appreciable mechanical strength that showed microhardness up to 2186 N/mm2 which is suitable for fluidized bed CLC reactors.

Original languageEnglish
Pages (from-to)7596-7603
Number of pages8
JournalEnergy and Fuels
Volume30
Issue number9
DOIs
Publication statusPublished - Sep 15 2016

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Oxides
Metals
Oxygen
Oxidation
Fluidized beds
Conversion efficiency
Carbon capture
Packed beds
Carbon Monoxide
Coprecipitation
Microhardness
Strength of materials
Transition metals
Power plants
Carbon
Antennas
Air

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Sajen, S., Singh, S. K., Mungse, P., Rayalu, S., Watanabe, K., Saravanan, G., & Labhasetwar, N. (2016). Mechanically stable mixed metal oxide of Cu and Mn as oxygen carrier for chemical looping syngas combustion. Energy and Fuels, 30(9), 7596-7603. https://doi.org/10.1021/acs.energyfuels.6b01433

Mechanically stable mixed metal oxide of Cu and Mn as oxygen carrier for chemical looping syngas combustion. / Sajen, Sandra; Singh, Sunit Kumar; Mungse, Pallavi; Rayalu, Sadhana; Watanabe, Kosuke; Saravanan, Govindachetty; Labhasetwar, Nitin.

In: Energy and Fuels, Vol. 30, No. 9, 15.09.2016, p. 7596-7603.

Research output: Contribution to journalArticle

Sajen, S, Singh, SK, Mungse, P, Rayalu, S, Watanabe, K, Saravanan, G & Labhasetwar, N 2016, 'Mechanically stable mixed metal oxide of Cu and Mn as oxygen carrier for chemical looping syngas combustion', Energy and Fuels, vol. 30, no. 9, pp. 7596-7603. https://doi.org/10.1021/acs.energyfuels.6b01433
Sajen, Sandra ; Singh, Sunit Kumar ; Mungse, Pallavi ; Rayalu, Sadhana ; Watanabe, Kosuke ; Saravanan, Govindachetty ; Labhasetwar, Nitin. / Mechanically stable mixed metal oxide of Cu and Mn as oxygen carrier for chemical looping syngas combustion. In: Energy and Fuels. 2016 ; Vol. 30, No. 9. pp. 7596-7603.
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