Characterization of an Australia hematite oxygen carrier in chemical looping combustion with coal

Song, Tao; Wu, Jiahua; Zhang, Haifeng; Shen, Laihong

doi:10.1016/j.ijggc.2012.08.013

Cited by 59 publications

(46 citation statements)

References 55 publications

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“…Much like ilmenite, iron ore typically performs better when calcined at high temperatures before use. The temperature of calcination was cited to be of high importance in Song et al (2012), however many different calcination temperatures (900-1000 °C) have shown comparable results.…”

Section: Hematite and Other Iron Oresmentioning

confidence: 99%

Use of natural ores as oxygen carriers in chemical looping combustion: A review

Matzen

Pinkerton

Wang

et al. 2017

International Journal of Greenhouse Gas Control

117

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Chemical looping combustion (CLC) has gained considerable ground in energy production due to its inherent carbon capture with a minimal energy penalty. The choice of metal oxide used as an oxygen carrier (OC) in CLC has a substantial weight on the overall efficiency of energy production as well as the ultimate cost per MW. While much work has gone into manufacturing synthetic OCs with high fuel conversions, harsh operating conditions and process limitations cause some unavoidable loss of the oxygen carrier. With low production costs and minimal conditioning required, natural ores have grown in interest as cheap alternative oxygen carriers. This work provides a substantial literature review of recent works studying the use of natural ores in CLC. Iron-based, manganesebased, copper-based and calcium based ores were found to be the main ores researched, along with mixtures of these ores and natural ores with minor additional compounds. Typical parameters have been collected for each study including; fuel conversion, stability, physical characteristics, and carbon capture efficiency. Natural ores are compared with purified metal oxides to highlight strengths and weaknesses of each ore and recommendations for future studies are made.

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Section: Hematite and Other Iron Oresmentioning

confidence: 99%

Use of natural ores as oxygen carriers in chemical looping combustion: A review

Matzen

Pinkerton

Wang

et al. 2017

International Journal of Greenhouse Gas Control

117

View full text Add to dashboard Cite

show abstract

“…For solid fuel chemical-looping processes, primarily oxides of Ni, Fe, Mn, and Cu have been studied [7,14,38,40,41,[66][67][68][69][70]. Nickel oxide is expensive and easily deactivated by sulfur from coal.…”

Section: Important Oxygen Carrier Characteristicsmentioning

confidence: 99%

“…If unconverted gases (CO, CH4) leave with the gas stream from the fuel reactor, the gases conversion and ηco2 will be low. The gas conversion for iG-CLC pilot tests are typically 75%-95% and depend on the coal, oxygen carrier, and solid inventory [13,38,40,66]. Complete conversion of the gases, including volatiles and syngas, is difficult.…”

Section: Challenges and Recent Research On The Ig-clc Processmentioning

confidence: 99%

“…For the iG-CLC, additives (CaO, CaCO3, and K2CO3) are used to enhance the rate of char conversion [37,38,53,85,86]. These additives are mechanically mixed with the oxygen carriers or impregnated on the oxygen carrier particles [38,40]. Song et al combined calcium aluminate cement with hematite (77.3% Fe2O3, 12% SiO2, and 10% Al2O3 by wt.)…”

Section: Challenges and Recent Research On The Ig-clc Processmentioning

confidence: 99%

“…In iG-CLC, the fuel gasification and the syngas CLC take place in a same fuel reactor. Iron-based oxygen carriers have often been used in iG-CLC [7,[39][40][41]. In the CLOU process, gaseous oxygen released from the oxygen carrier combusts the fuel.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chemical-Looping Combustion and Gasification of Coals and Oxygen Carrier Development: A Brief Review

Ping

Means²,

Shekhawat

et al. 2015

Energies

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Chemical-looping technology is one of the promising CO2 capture technologies. It generates a CO2 enriched flue gas, which will greatly benefit CO2 capture, utilization or sequestration. Both chemical-looping combustion (CLC) and chemical-looping gasification (CLG) have the potential to be used to generate power, chemicals, and liquid fuels. Chemical-looping is an oxygen transporting process using oxygen carriers. Recently, attention has focused on solid fuels such as coal. Coal chemical-looping reactions are more complicated than gaseous fuels due to coal properties (like mineral matter) and the complex reaction pathways involving solid fuels. The mineral matter/ash and sulfur in coal may affect the activity of oxygen carriers. Oxygen carriers are the key issue in chemical-looping processes. Thermogravimetric analysis (TGA) has been widely used for the development of oxygen carriers (e.g., oxide reactivity). Two proposed processes for the CLC of solid fuels are in-situ Gasification Chemical-Looping Combustion (iG-CLC) and Chemical-Looping with Oxygen Uncoupling (CLOU). The objectives of this review are to discuss various chemical-looping processes with coal, summarize TGA applications in oxygen carrier development, and outline the major challenges associated with coal chemical-looping in iG-CLC and CLOU. OPEN ACCESSEnergies 2015, 8 10606

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Evaluation of ash‐free coal for chemical looping combustion ‐ part II: Thermogravimetric multi‐cycle performance

et al. 2016

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In this paper, performance of AFC in CLC during multi-cycle thermogravimetric (TG) experiments was investigated. The close to stoichiometric CuO/AFC ratio of 30 is selected for the consecutive reduction and re-oxidation cyclic experiments. The reactivity of the first cycle was higher than the consecutive cycles due to the fresh CuO in the first cycle. The thermal behaviours, such as mass change in the consecutive cycles, were almost similar and there was no residual ash deposition after each cycle. Furthermore, reduction and oxidation processes were performed with different isothermal times. After 1 h the combustion was incomplete but a longer combustion period (3 h) leads to almost complete combustion. Moreover, fresh samples and solid residues were analyzed by several advanced analytical techniques including XRD, SEM, and BET. XRD analysis of the residue of CuO/AFC showed the presence of CuO at the end of the cycles; CuO and SiO 2 in residues from CuO/BL raw coal (parent coal of AFC) were shown in XRD results. At the higher temperatures (900 8C) the sintering effect and increased agglomeration were observed after each cycle. Total pore volume and average pore radius of the material decreased, however, the CLC performances at 900 8C did not reduce. The multi-cycle experiments showed AFC as a promising candidate for CLC.

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Characterization of an Australia hematite oxygen carrier in chemical looping combustion with coal

Cited by 59 publications

References 55 publications

Use of natural ores as oxygen carriers in chemical looping combustion: A review

Use of natural ores as oxygen carriers in chemical looping combustion: A review

Chemical-Looping Combustion and Gasification of Coals and Oxygen Carrier Development: A Brief Review

Evaluation of ash‐free coal for chemical looping combustion ‐ part II: Thermogravimetric multi‐cycle performance

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