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Mechanically Stable Mixed Metal Oxide of Cu and Mn as Oxygen Carrier for Chemical Looping Syngas Combustion

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Title Mechanically Stable Mixed Metal Oxide of Cu and Mn as Oxygen Carrier for Chemical Looping Syngas Combustion
 
Creator Sajen, Sandra
Singh, Sunit Kumar
Mungse, Pallavi
Rayalu, Sadhana
Watanabe, Kosuke
Govindachetty , Saravanan
Labhsetwar, Nitin
 
Subject Air Pollution
Environmental Pollution
Chemistry, Chemical Technology
Materials Science
 
Description 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 multi-cycle performance for the oxidation of syngas as fuel.
It was observed that, 90% of oxygen carrying capacity of CuMn2O4 can be utilized for the
oxidation of syngas with almost 100% conversion efficiency in a packed bed reactor. Theconversion 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
micro-hardness up to 2186 N/mm2 which is suitable for fluidized bed CLC reactors.
 
Publisher ACS publications
 
Date 2016-08-23
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/952/2/acs%252Eenergyfuels%252E6b01433.pdf
Sajen, Sandra and Singh, Sunit Kumar and Mungse, Pallavi and Rayalu, Sadhana and Watanabe, Kosuke and Govindachetty , Saravanan and Labhsetwar, Nitin (2016) Mechanically Stable Mixed Metal Oxide of Cu and Mn as Oxygen Carrier for Chemical Looping Syngas Combustion. Energy & fuels, 30 (9). pp. 7596-7603. ISSN 0887-0624, ESSN: 1520-5029
 
Relation http://pubs.acs.org/journal/enfuem
http://neeri.csircentral.net/952/