LFO Perovskites as Oxygen Carriers for Chemical Looping Oxygen Uncoupling (CLOU)

• Published in: Journal of thermal analysis and calorimetry Vol. 147; no. 12; pp. 6605 - 6613
• Main Authors: Ahmad, Ali, Al Mamun, Md. Abdullah, Al-Mamun, Md, Huque, Saiful, Ismail, Mohammad
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-06-2022; Springer; Springer Nature B.V
• Subjects: Analytical Chemistry; Carbon dioxide; Carbon dioxide concentration; Carbon sequestration; Chemistry; Chemistry and Materials Science; Combustion; Energy minerals; Energy technology; Evolution; Fluidized bed combustion; Fossil fuels; High temperature; Hydrogen as fuel; Inorganic Chemistry; Measurement Science and Instrumentation; Nuclear fuels; Oxygen; Perovskites; Physical Chemistry; Polymer Sciences; Power plants; Oxygen uncoupling; Oxygen carrier; Perovskites; Citrate gel; Carbon capture; LaFeO
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-021-10995-w

Alternative energy technologies at their current state cannot fully replace the existing fossil fuel-based energy production that has led to a rise in the atmospheric CO
2
concentration. CO
2
sequestration is a compelling solution to greatly reduce CO
2
emissions from sources like fossil fuel-based power plants. Chemical-looping oxygen uncoupling process releases gaseous oxygen for combustion at high temperatures in the fuel reactor. The choice of oxygen carrier material (OCM) is pivotal to the chemical-looping process. In this study, citrate gel technique has been used to prepare the OCMs. A total of 5 (five) perovskites were prepared with varying degree of substitution of general formula La
0.6
A′
0.4
B′
1-y
Fe
y
O
3
where
y
 = (0.8, 0.9) including the base LaFeO
3
. Calcined OCMs were characterized with XRD, SEM and BET analysis. OCMs showed an increase in surface area after oxygen release in a thermogravimetric experiment. Oxygen evolution rate ranged from 0.0043 to 0.0521 Kg O
2
/Kg OCM in a single cycle operation.