Chemical-looping combustion in a 100-kW unit using a mixture of ilmenite and manganese ore as oxygen carrier

Linderholm, Carl Johan; Schmitz, Matthias; Knutsson, Pavleta; Lyngfelt, Anders

doi:10.1016/j.fuel.2015.11.015

Cited by 97 publications

(47 citation statements)

References 32 publications

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“…This is not surprising due to the overwhelming research into the use of ilmenite as an OC. Linderholm et al (2016) present a mix of ilmenite with Mn ore to combust solid fuels. This led to an increased gas conversion efficiency from 84.2% to 91.5% as well as improvements in CCE and solid fuel conversion.…”

Section: Mixed Ores and Modificationsmentioning

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

118

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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: Mixed Ores and Modificationsmentioning

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

118

View full text Add to dashboard Cite

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“…Few works addressed the study of biomass combustion in a CLC continuous unit, mostly under iG‐CLC configuration . At Instituto de Carboquímica (ICB‐CSIC), we identified two promising oxygen carriers for the iG‐CLC and CLOU processes, respectively.…”

Section: Introductionmentioning

confidence: 99%

Process Comparison for Biomass Combustion: In Situ Gasification‐Chemical Looping Combustion (iG‐CLC) versus Chemical Looping with Oxygen Uncoupling (CLOU)

et al. 2016

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Biomass is an interesting renewable fuel to be used in chemical looping combustion (CLC). If the CO2 generated during biomass combustion is captured, the negative‐CO2 emission concept is possible. This work evaluates the differences between biomass combustion under two CLC configurations developed for solid fuels: in situ gasification‐chemical looping combustion (iG‐CLC) and chemical looping with oxygen uncoupling (CLOU). The combustion efficiency, tar emission, and carbon capture efficiency obtained at different fuel reactor temperatures in a continuous 1.5 kWth CLC unit were compared. Higher carbon capture efficiencies were reached under the CLOU mode, with no tar emission. Although in the iG‐CLC mode tars were always present in the fuel reactor outlet gas, high carbon capture was reached by using CO2 as gasifying agent. Moreover, a simulation of the effect of the solid inventory necessary in the fuel reactor to reach certain carbon capture efficiency was performed for both processes. Lower solid inventories are needed in the CLOU configuration, but the cost for the oxygen carrier used in CLOU is higher than in iG‐CLC.

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“…It is noteworthy that manganese minerals are used more and more in the area of chemical looping combustion (CLC) as an oxygen carrier [22][23][24][25]. CLC is an emerging technology for high-efficiency fuel conversion with inherent carbon capture.…”

Section: Introductionmentioning

confidence: 99%

Carbothermic Reduction of Ferruginous Manganese Ore for Mn/Fe Beneficiation: Morphology Evolution and Separation Characteristic

Huang

Jiang

et al. 2017

Minerals

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Abstract:In the present paper, beneficiation of Fe and Mn elements from a ferruginous manganese ore via carbothermic reduction followed by magnetic separation process was investigated in detail. The effects of the experimental parameters were systematically discussed. Iron-rich products with an Fe grade of 62.3% and 88.2% of Fe recovery, and manganese-rich product with a Mn grade of 63.7% of and 70.4% of Mn recovery were obtained, respectively, at an optimal temperature of 1100 • C, with a roasting time of 100 min, anthracite addition of 25%, milling fineness of 90% passing 0.074 mm, and a magnetic intensity of 140 A/m. Furthermore, the morphology evolution and phase transformation laws along with reduction process were revealed by optical microscope, scanning electron microscope equipped with energy dispersive X-ray detector (SEM-EDX), X-ray diffraction (XRD), and chemical phase analysis. The results demonstrated that the ferruginous manganese ore reduction can be described as follows: plate-like Fe-Mn symbiotic phase decomposition → granular MnO phase formation → fine metallic iron formation → aggregation of metallic iron → boundary development between Fe and Mn phases.

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Chemical-looping combustion in a 100-kW unit using a mixture of ilmenite and manganese ore as oxygen carrier

Cited by 97 publications

References 32 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

Process Comparison for Biomass Combustion: In Situ Gasification‐Chemical Looping Combustion (iG‐CLC) versus Chemical Looping with Oxygen Uncoupling (CLOU)

Carbothermic Reduction of Ferruginous Manganese Ore for Mn/Fe Beneficiation: Morphology Evolution and Separation Characteristic

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