Chemical looping combustion of coal in a 5 kWth interconnected fluidized bed reactor using hematite as oxygen carrier

Ma, Jinchen; Zhao, Haibo; Tian, Xin; Wei, Yijie; Rajendran, Sharmen; Zhang, Yongliang; Bhattacharya, Sankar; Chen, Zheng

doi:10.1016/j.apenergy.2015.03.124

Cited by 109 publications

(68 citation statements)

References 38 publications

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“…A 5 kW th dual circulation fluidized bed for the CLC of coal was constructed by our research group [6]. Some experiments were conducted on this rig to investigate the effects of the operational parameters, such as the FR temperature, the thermal power and the fluidized gas flow rate, on the combustion efficiency.…”

Section: Reactor Geometry Initial Condition and Boundary Conditionmentioning

confidence: 99%

“…Due to the complex multiphase reactive flows present in CLC reactors (usually dual-circulation fluidized beds [3][4][5][6], also a small amount of fixed bed [7]), a comprehensive understanding to the multiphase reactive flows is important for the rational design, optimal operation and scaling-up of the CLC reactors. As an effective tool, numerical simulation has been used by many researchers.…”

Section: Introductionmentioning

confidence: 99%

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Computational fluid dynamics simulation for chemical looping combustion of coal in a dual circulation fluidized bed

Zhao

2015

Energy Conversion and Management

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Section: Reactor Geometry Initial Condition and Boundary Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics simulation for chemical looping combustion of coal in a dual circulation fluidized bed

Zhao

2015

Energy Conversion and Management

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“…More detailed descriptions of the units have been provided in the reviews above. Recent units, all operating with solid fuels, are a 1 MW unit in Darmstadt, Germany (Ströhle et al, 2014b) where the first autothermal operation was recently reported, a 5 kW unit in Huazhong, China (Ma et al, 2014) and a 50 kW unit in Zaragoza, Spain (Pérez-Vega et al, 2014). With respect to manufactured oxygen carriers, the operational experience includes 2800 h with nickel-based materials in 12 units, 627 h with copper-based materials in six units, 1077 h with iron-based materials in eight units, 180 h with cobalt-based materials in two units and 545 h with combined oxide materials in six units.…”

Section: Operational Experiencementioning

confidence: 98%

Emerging CO2 capture systems

Abanades

Arias

Lyngfelt

et al. 2015

International Journal of Greenhouse Gas Control

397

267

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a b s t r a c tIn 2005, the IPCC SRCCS recognized the large potential for developing and scaling up a wide range of emerging CO 2 capture technologies that promised to deliver lower energy penalties and cost. These included new energy conversion technologies such as chemical looping and novel capture systems based on the use of solid sorbents or membrane-based separation systems. In the last 10 years, a substantial body of scientific and technical literature on these topics has been produced from a large number of R&D projects worldwide, trying to demonstrate these concepts at increasing pilot scales, test and model the performance of key components at bench scale, investigate and develop improved functional materials, optimize the full process schemes with a view to a wide range of industrial applications, and to carry out more rigorous cost studies etc. This paper presents a general and critical review of the state of the art of these emerging CO 2 capture technologies paying special attention to specific process routes that have undergone a substantial increase in technical readiness level toward the large scales required by any CO 2 capture system.

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“…Recently, the operation of a pressurized system that runs on iron ore was demonstrated . Hematite was used as an oxygen carrier to combust Chinese bituminous coal in a 5 kW plant by Ma et al . Hofbauer et al .…”

Section: Introductionmentioning

confidence: 99%

“…Recently,t he operationo fapressurized system that runs on iron orew as demonstrated. [20] Hematite was used as an oxygenc arrier to combust Chineseb ituminous coal in a5 kW plant by Ma et al [21] Hofbauer et al [22] operated ap ilot plant for gaseous fuels with ar ated power of 120 kW. Ab ig solid fuel CLC plant is operateda tT UD armstadt with ar ated power of 1MW.…”

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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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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Chemical looping combustion of coal in a 5 kWth interconnected fluidized bed reactor using hematite as oxygen carrier

Cited by 109 publications

References 38 publications

Computational fluid dynamics simulation for chemical looping combustion of coal in a dual circulation fluidized bed

Computational fluid dynamics simulation for chemical looping combustion of coal in a dual circulation fluidized bed

Emerging CO2 capture systems

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

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