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Title: Barium aluminate improved iron ore for the chemical looping combustion of syngas
Authors: Wang, Haiming
Dou, Xiaomin
Veksha, Andrei
Liu, Wen
Giannis, Apostolos
Ge, Liya
Lim, Teik-Thye
Lisak, Grzegorz
Keywords: Engineering::Environmental engineering
Issue Date: 2020
Source: Wang, H., Dou, X., Veksha, A., Liu, W., Giannis, A., Ge, L., Lim, T. & Lisak, G. (2020). Barium aluminate improved iron ore for the chemical looping combustion of syngas. Applied Energy, 272, 115236-.
Project: WTE CRP 1701 105 
Journal: Applied Energy 
Abstract: Chemical looping combustion (CLC), as an advanced combustion technology, has attracted much attention because of its applicability to a variety of fuels and its ability to achieve inherent carbon capture. However, CLC of municipal solid waste (MSW) has been seldom reported. In this study, we investigated the CLC of simulated MSW-derived syngas using iron ore (IO)-based oxygen carriers (OCs). To enhance the redox activity of the IO, barium aluminate (BaAl2O4) was used for the first time as a promoter of the OC. It was found that the surface decoration with BaAl2O4 significantly improved the redox performance of IO over the temperature range of 700–900 °C. Almost 100% syngas combustion over 30 redox cycles was achieved by IO modified with 10% of BaAl2O4 (IO-10BA) at a space velocity of 31700 h−1, whereas only ~70% combustion efficiency was achieved by pristine IO. Additionally, BaAl2O4 doping improved the oxygen transport capacity of the IO by 36.2%. Based on complementary characterization analyses, we found that more oxygen vacancies were formed in the modified OC due to the oxygen non-stoichiometry nature of the BaAl2O4 and its interaction with the iron oxide species. This interaction facilitated the rapid migration of the lattice oxygen in the bulk phase, thereby enhancing the reactivity and increasing the oxygen transport capacity of the OCs. The addition of BaAl2O4 also induced a change to the solid morphology, making the OC become more porous over redox cycles, a phenomenon that was partly responsible for the high combustion performance of the IO-10BA.
ISSN: 0306-2619
DOI: 10.1016/j.apenergy.2020.115236
Rights: © 2020 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles
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