Selecting and Testing of Cement-Bonded Magnetite and Chalcopyrite as Oxygen Carrier for Chemical-Looping Combustion

Li, Mengjun; Zheng, Teng; Mei, Daofeng; Wang, Baowen; Ma, Jingjing

doi:10.3390/en15145093

Cited by 5 publications

(3 citation statements)

References 34 publications

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“…It is illustrated that 30 wt % cement loading may not satisfy the demand for stability. Meanwhile, slight sintering is observed only on the surface of the cycled LOC@10C, suggesting that appropriate inert material is necessary to improve the antisintering capacity of the oxygen carrier, consistent with the previous researches. ,− …”

Section: Resultssupporting

confidence: 88%

Industrial-Scale Preparation of Biore Oxygen Carriers for Chemical Looping Combustion via a Hydroforming Method

Liu,

Bu,

Zou

et al. 2024

Energy Fuels

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Chemical looping combustion (CLC) has entered the stage of engineering demonstration, thus urgently requiring industrial-scale preparation of an oxygen carrier (OC). This work proposes a novel hydroforming method for the industrial-scale preparation of OC. The cheap copper ore and iron ore fines are active components, and cement is the binder. First, the biore OCs through a laboratory hydraulic press are tested in a thermogravimetric analyzer (TGA) and a batch fluidized bed (BFB) reactor. The optimal loading ratio of cement is 20 wt %, and a CH 4 conversion above 90% is achieved. Second, the hydroforming is scaled up to the industrial scale. The industrial-scale OC shows favorable performance in the 100-cycle H 2 /CH 4 /coal CLC tests, achieving an oxygen loss ratio of 6 wt %, a CH 4 conversion of around 90%, and a combustion efficiency of 95%, respectively. Finally, the characterization results suggest that the OCs always meet the crushing strength demand and their specific surface areas get larger after 100 cycles. They demonstrate stable crystal structures with Fe 2 O 3 and CuFe 2 O 4 , relatively rich pore structures, and evenly distributed elements throughout the cycles. The industrial-scale hydroforming method is a competitive candidate for OC preparation, considering the favorable performance of prepared OC and its high compatibility with raw materials.

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Section: Resultssupporting

confidence: 88%

Industrial-Scale Preparation of Biore Oxygen Carriers for Chemical Looping Combustion via a Hydroforming Method

Liu,

Bu,

Zou

et al. 2024

Energy Fuels

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“…Copper oxides have high reactivity and oxygen transfer capacity . In combination with copper oxides, the performance of Fe-based OCs would be significantly improved. , An et al found that CuFe 2 O 4 OCs can oxidize gasification products during the CLC process, thus promoting the oxidation of Hg 0 indirectly. An et al also pointed out that the gasification product H 2 S could generate active S in the FR, promoting the conversion from Hg 0 to HgS.…”

Section: Factors Influencing Mercury Migration In the Clc Systemmentioning

confidence: 99%

Review and Perspectives on Mercury Release and Migration during Chemical Looping Combustion of Solid Fuels

Lyu,

Guan,

et al. 2024

Energy Fuels

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Chemical looping combustion (CLC) is a promising technology for global carbon reduction. In the CLC system, mercury released during combustion is not only a hazardous pollutant but also a risk to the system safety because mercury can easily lead to the amalgamation and fracture of the decarbonizing equipment. Understanding the mercury release and migration characteristics is the foundation for the safe operation of the CLC system. The purpose of this study is to lay the scientific foundation for achieving deep mercury removal during the CLC of solid fuels. The mercury flow and distribution within the CLC system were discussed. The differences in mercury release between CLC and conventional combustion or gasification were analyzed. The influence mechanisms of the key factors, such as fuel type, temperature, atmosphere, and oxygen carrier, on the release and migration fate of mercury during the CLC processes were discussed. The removal mechanisms of elemental mercury in the CLC system were revealed. Finally, research perspectives on mercury control in the CLC system were proposed. This review includes a comprehensive review of the latest research progress on mercury emission control within the CLC system. The findings of this study can provide guidance for the development of the deep mercury removal technology during CLC processes and help break the bottleneck which restricts the long-term safe operation of the CLC system.

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“…The modeling and optimization of the FR is an important area for the development of CLC [9,10]. Performance and improvement of OC is another area of focus [11,12]. CLC can produce energy in the form of heat and/or electricity with low carbon emissions from conventional fossil fuels.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of an Industrial-Scale 525 MWth Petcoke Chemical Looping Combustion Power Plant

et al. 2023

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This paper presents the modeling and simulation of an industrial-scale chemical looping combustion (CLC) power plant, including all process units (reactors, flue gas treatment units, heat integration, steam cycle, and CO2 compression train). A model of a 525 MWth CLC power plant was built using a rigorous representation of the solid fuel and oxygen carrier. Petcoke was considered the main fuel of interest in this study, and it is compared with other solid fuels. The flue gas compositions obtained with the model show that cleanup units are mandatory to comply with CO2 quality requirements. High levels of flue gas treatment, including 97.1% deNOx and 99.4% deSOx, are needed to achieve typical specifications for captured CO2. This is mainly due to the high level of contaminants in the fuel, but also to the absence of nitrogen in the CLC flue gas, thus resulting in higher concentrations for all substances. The high level of flue gas treatment is thus one of the important challenges for solid fuel combustion in CLC. The overall CO2 capture efficiency of the plant is estimated to be as high as 94%. Regarding the energy balance, a process net efficiency of 38% is obtained. Comparing the results with other available technologies shows that CLC exhibits one of the highest net plant efficiencies and carbon capture rates. CLC is thus a promising technology to produce clean energy from solid fuels. Finally, based on a sensitivity analysis, it is shown that process efficiency is mainly affected by the design and performance of the CLC furnace, the steam injection rate in the fuel reactor, the char separation efficiency, and the excess oxygen in the air reactor.

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Selecting and Testing of Cement-Bonded Magnetite and Chalcopyrite as Oxygen Carrier for Chemical-Looping Combustion

Cited by 5 publications

References 34 publications

Industrial-Scale Preparation of Biore Oxygen Carriers for Chemical Looping Combustion via a Hydroforming Method

Industrial-Scale Preparation of Biore Oxygen Carriers for Chemical Looping Combustion via a Hydroforming Method

Review and Perspectives on Mercury Release and Migration during Chemical Looping Combustion of Solid Fuels

Modeling and Simulation of an Industrial-Scale 525 MWth Petcoke Chemical Looping Combustion Power Plant

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