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Solvent-free, improved synthesis of pure bixbyite phase of iron and manganese mixed oxides as low-cost, potential oxygen carrier for chemical looping with oxygen uncoupling

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Title Solvent-free, improved synthesis of pure
bixbyite phase of iron and manganese mixed
oxides as low-cost, potential oxygen carrier
for chemical looping with oxygen uncoupling
 
Creator Mungse, Pallavi B
Govindachetty, Saravanan
Nishibori, Maiko
Subrt, Jan
Labhsetwar, Nitin
 
Subject Air Pollution
Air Pollution Control
Environmental Pollution
Chemistry, Chemical Technology
Materials Science
 
Description Chemical looping with oxygen uncoupling (CLOU) is the tendency of releasing gaseous oxygen of an
oxygen carrier upon heating, which is the key property for the efficient and cleaner combustion of solid fuels
for their wide exploitation for thermal power applications. The solvent-free, improved synthesis method was
developed for the synthesis of pure bixbyite, FeMnO3 (Ia3̅, a = b = c = 0.94 nm) as a low-cost, oxygen carrier
by exposing of the abundantly available precursors (Fe3O4 and MnO) under inert- or reduction- atmosphere
followed by air at 900 °C. The bixbyite FeMnO3 showed the enhanced, stable multi-cycle CLOU performance
than that of the physical mixture and it is converted into FeMn2O4 after the complete exhaustion of reactive
oxygen under CLOU conditions. FeMnO3 showed the uniform elemental distribution of Fe, Mn and O, which
facilitate the regeneration in air upon heating for multi-cycle performance. 3.2 wt.% of reactive oxygen can
be obtained compared to the mass of FeMnO3 which is almost equal to the theoretical value under CLOU
conditions. The lattice of FeMnO3 is altered linearly above 100 °C with the increase of temperature, however;
without the decomposition of the bixbyite phase and it was reinstated virtually upon cooling in air.
 
Publisher IUPAC & De-Gruyter
 
Date 2017-04-20
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/954/1/IUPAC_NEERI.pdf
Mungse, Pallavi B and Govindachetty, Saravanan and Nishibori, Maiko and Subrt, Jan and Labhsetwar, Nitin (2017) Solvent-free, improved synthesis of pure bixbyite phase of iron and manganese mixed oxides as low-cost, potential oxygen carrier for chemical looping with oxygen uncoupling. Pure and Applied Chemistry, 89 (4). pp. 1-12. ISSN 0033-4545, ESSN: 1365-3075
 
Relation https://www.degruyter.com/
http://neeri.csircentral.net/954/