Combustion performance and sodium transformation of high-sodium ZhunDong coal during chemical looping combustion with hematite as oxygen carrier

Ge, Huijun; Shen, Laihong; Gu, Haiming; Song, Tao; Jiang, Shouxi

doi:10.1016/j.fuel.2015.06.073

Cited by 85 publications

(75 citation statements)

References 40 publications

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“…The 50 kW plant allows chemical‐looping combustion with oxygen uncoupling (CLOU) operation . Song et al . erected a plant for the combustion of coal and biomass with a rated power of 1 kW.…”

Section: Introductionsupporting

confidence: 89%

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Analysis of a Two‐Stage Fuel Reactor System for the Chemical‐Looping Combustion of Lignite and Bituminous Coal

et al. 2016

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To investigate the influence of the fuel characteristics on the conversion behavior in a chemical‐looping combustion facility, lignite coal dust (d90,3=233 μm) and two fractions of bituminous coal with different particle sizes (fine fraction d90,3=163 μm, coarse fraction d50,3=707 μm) were used as solid fuel. To improve the conversion performance, a pilot plant with a rated power of 25 kW was constructed with a two‐stage fuel reactor. The influence of the fuel composition, particle size, and the presence/absence of elemental oxygen on the conversion in the fuel reactor are presented. The used oxygen carrier was produced by the impregnation of γ‐alumina oxide with copper oxide, which is able to release gaseous oxygen, but loses this ability because of deactivation. The lignite dust shows a very good conversion performance and carbon capture efficiencies over 95 % as well as oxygen demands below 2 %. Both bituminous coal fractions have a good performance with regard to fuel conversion and oxygen demand but they suffer from a high carbon slip. Hence the carbon capture efficiency is around 60 % for the fine fraction and 40 % for the coarse one. The performance improvement as a result of the second stage was investigated separately, and we proved that it enhances the overall conversion. In addition, the oxygen carrier generated a favorable reaction environment by releasing elemental oxygen in the second stage of the fuel reactor.

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Section: Introductionsupporting

confidence: 89%

“…The5 0kWp lant allowsc hemical-looping combustion with oxygenu ncoupling (CLOU) operation. [17] Song et al [18,19] erected ap lant for the combustiono fc oal and biomass with ar ated power of 1kW. Recently,t he operationo fapressurized system that runs on iron orew as demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Two‐Stage Fuel Reactor System for the Chemical‐Looping Combustion of Lignite and Bituminous Coal

et al. 2016

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“…However, due to the insufficient understanding of its characteristics, the utilization of Zhundong coal is limited by the occurrence of severe slagging and fouling [2,3]. To better understand and resolve these two problems, researchers have tested Zhundong coal extensively, but mostly in laboratory-scale furnaces [2,[4][5][6][7][8]. The main cause for slagging and fouling of Zhundong coal is attributed to the richness of alkali-alkaline earth metal (AAEM) elements, particularly Na.…”

Section: Introductionmentioning

confidence: 99%

Effects of wall temperature on slagging and ash deposition of Zhundong coal during circulating fluidized bed gasification

Song

et al. 2016

Applied Thermal Engineering

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“…Ge et al. suggested that sodium ferrite as an electron donor could weaken the Fe–O bond in Fe 2 O 3 /Al 2 O 3 oxygen carriers, thereby enhancing the reaction kinetics during CLC. The catalytic effect of K was related to the distribution of Fe 2 O 3 .…”

Section: Resultsmentioning

confidence: 99%

Effects of Na₂CO₃/K₂CO₃ on Chemical Looping Combustion Using Fe₂O₃/Al₂O₃ as Oxygen Carrier

et al. 2020

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The performance of the Fe2O3/Al2O3 oxygen carrier modified by the alkali metals, Na and K, was studied by thermogravimetric analysis and in a laboratory‐scale fluidized‐bed reactor. Different factors, such as the alkali metal content, the alkali metal type, and the interaction between Na and K, were taken into account. Both Na and K had strong catalytic effects on the conversion of Fe2O3. A high K content caused serious agglomeration. Increasing the Na content led to slagging because of the low‐melting point solid solution. The possibility of agglomeration and slagging was reduced when Na and K were added together. The oxygen carrier with 1.5 wt % Na and 1.5 wt % K had better combustion efficiency and optimal thermal stability. Na and K could enhance the attrition resistance and prolong the lifetime of the oxygen carriers.

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Combustion performance and sodium transformation of high-sodium ZhunDong coal during chemical looping combustion with hematite as oxygen carrier

Cited by 85 publications

References 40 publications

Analysis of a Two‐Stage Fuel Reactor System for the Chemical‐Looping Combustion of Lignite and Bituminous Coal

Analysis of a Two‐Stage Fuel Reactor System for the Chemical‐Looping Combustion of Lignite and Bituminous Coal

Effects of wall temperature on slagging and ash deposition of Zhundong coal during circulating fluidized bed gasification

Effects of Na₂CO₃/K₂CO₃ on Chemical Looping Combustion Using Fe₂O₃/Al₂O₃ as Oxygen Carrier

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Combustion performance and sodium transformation of high-sodium ZhunDong coal during chemical looping combustion with hematite as oxygen carrier

Cited by 85 publications

References 40 publications

Analysis of a Two‐Stage Fuel Reactor System for the Chemical‐Looping Combustion of Lignite and Bituminous Coal

Analysis of a Two‐Stage Fuel Reactor System for the Chemical‐Looping Combustion of Lignite and Bituminous Coal

Effects of wall temperature on slagging and ash deposition of Zhundong coal during circulating fluidized bed gasification

Effects of Na2CO3/K2CO3 on Chemical Looping Combustion Using Fe2O3/Al2O3 as Oxygen Carrier

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Effects of Na₂CO₃/K₂CO₃ on Chemical Looping Combustion Using Fe₂O₃/Al₂O₃ as Oxygen Carrier