Design and operation of a 10kWth chemical-looping combustor for solid fuels – Testing with South African coal

Berguerand, Nicolas; Lyngfelt, Anders

doi:10.1016/j.fuel.2008.03.008

Cited by 381 publications

(321 citation statements)

References 14 publications

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“…In previous CLC experiments with solid fuels performed to date, full oxidation of the outlet fuel reactor stream could not be achieved [8][9][10][11][12][13][14][15][16][17]. Furthermore, the extent of unburt gases was similar as if a highly Ni-based oxygen carrier was used [14][15][16].…”

Section: Solid Fuelmentioning

confidence: 99%

“…Ilmenite was found to be an appropriate material for its use as oxygen carrier in CLC with solid fuels [8][9][10][11]. Ilmenite is a relatively cheap and abundantly occurring mineral mainly consisting of FeTiO 3 .…”

Section: Solid Fuelmentioning

confidence: 99%

“…Furthermore, the extent of unburt gases was similar as if a highly Ni-based oxygen carrier was used [14][15][16]. Therefore, in order to oxidize completely unburnt compounds to CO 2 and H 2 O and enhance combustion, an oxygen polishing step downstream was proposed, that is, injection of pure oxygen to the gas flow after the fuel reactor cyclone [8,9], with the corresponding oxygen demand.…”

Section: Solid Fuelmentioning

confidence: 99%

“…As for continuous operation, Berguerand and Lyngfelt [8][9][10][11] used a 10 kW th chemicallooping combustor with ilmenite as oxygen carrier and South African coal and petroleum coke as solid fuels. They analyzed the combustion process focusing on char conversion and the conversion of gases from steam gasification (CO and H 2 ) was analyzed.…”

Section: Solid Fuelmentioning

confidence: 99%

“…The most used for solid fuel combustion is the two interconnected fluidized beds configuration [8][9][10][11][12][13][14][15][16][17], for which the two reactors are the fuel and the air reactor. In the fuel reactor the oxygen carrier is reduced through oxidation of the fuel, thus obtaining a gas stream composed of CO 2 and H 2 O.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Relevance of the coal rank on the performance of the in situ gasification chemical-looping combustion

Cuadrat

Abad

Gayán

et al. 2012

Chemical Engineering Journal

100

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In this work the CLC process for solid fuels using ilmenite as oxygen carrier was evaluated in a continuous CLC unit. In this process, gasification of solid fuel happens in the fuel reactor which is fluidized by a gasifying agent, i.e, H 2 O. This process has been referred as in-situ Gasification CLC, iG-CLC. The feasibility of using fuels ranging from lignite to anthracite and the effect of the coal rank on the process performance was evaluated. The carbon capture efficiency followed the trend of the coal rank, as it was higher for lignite, then for the bituminous coals and it was lower for anthracite. Special attention was put on the combustion of the volatile matter of the different fuels. In all cases oxygen demands lower than 10% were found; for anthracite the oxygen demand values were 3.5% because of the lower volatile content of this fuel. A temperature increase was proven to be advantageous to reach high carbon capture and combustion efficiencies for all the fuels tested. Also, the feasibility of using H 2 O:CO 2 mixtures as gasification agent with each type of fuel was also assessed and it was seen that in case of bituminous coals and lignite some of H 2 O can be replaced by CO 2 .

show abstract

Section: Solid Fuelmentioning

confidence: 99%

Section: Solid Fuelmentioning

confidence: 99%

Section: Solid Fuelmentioning

confidence: 99%

Section: Solid Fuelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Relevance of the coal rank on the performance of the in situ gasification chemical-looping combustion

Cuadrat

Abad

Gayán

et al. 2012

Chemical Engineering Journal

100

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Chemical Looping Combustion

Li¹,

Wang²,

Sridhar³

et al. 2010

Chemical Looping Systems for Fossil Energy Conversions

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Chemical Looping Combustion and Gasification

Fan

Chung

Bayham

et al. 2015

Handbook of Clean Energy Systems

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With the emerging challenge of climate change and the continued escalation of energy demands, innovative and flexible fuel conversion technologies are necessary and gaining recognition. Chemical looping technologies have the potential to not only reduce energy costs, but also to mitigate carbon emissions. Historically, the general concept of this reduction–oxidation mechanism has been suggested, but the process was never commercialized. Recent interests in carbon capture techniques have revitalized the adaptive chemical looping system. Chemical looping technologies can utilize both gaseous and solid fuels such as natural gas and coal, respectively, for power, hydrogen, or chemical generation. However, the success of technological adoption requires a thorough understanding of the types of chemical looping techniques, the design considerations, and the reactor modes of configurations. Current large‐scale testing units are examined with the hope for near‐term advancement and future commercial application.

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Design and operation of a 10kWth chemical-looping combustor for solid fuels – Testing with South African coal

Cited by 381 publications

References 14 publications

Relevance of the coal rank on the performance of the in situ gasification chemical-looping combustion

Relevance of the coal rank on the performance of the in situ gasification chemical-looping combustion

Chemical Looping Combustion

Chemical Looping Combustion and Gasification

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