Fuel Processing Technology

2010

DOI: 10.1016/j.fuproc.2010.06.010

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Oxy-fuel circulating fluidized bed combustion in a small pilot-scale test rig

Tomasz Czakiert

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Introduction2

Literature Survey1

Węgiel Brunatny1

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Cited by 104 publications

(53 citation statements)

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“…Wheeler [8], Metso [9], Czestochowa University of Technology [10], Canmet Energy 57 [6,[11][12][13], and Fundación Ciuden [14] have carried out oxy-fuel combustion 58 experimental tests with CFB combustors at scales up to 30 MW th . 59…”

Section: Introduction 32mentioning

confidence: 99%

Sulfur retention in an oxy-fuel bubbling fluidized bed combustor: Effect of coal rank, type of sorbent and O 2 /CO 2 ratio

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Garcı́a-Labiano

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et al. 2014

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In this work, SO 2 retention via calcium-based sorbents added in a continuous bubbling 17 fluidized bed combustor (~3 kWth) operating in oxy-fuel combustion mode is analyzed. 18Tests were performed at different operating temperatures with three sorbents, two 19 limestones and one dolomite, and with three coals, ranging from lignite to anthracite, to 20 analyze the influence of coal rank, type of sorbent, sorbent particle size, and O 2 /CO 2 21 feeding ratio on the sulfation process. 22It was found that the combustor temperature had a strong influence on the limestones 23 sulfur retention with a maximum at 900-925 ºC. The behavior of the limestones was 24 qualitatively similar with the three coals, attaining the highest sulfur retention values 25

“…Wheeler [8], Metso [9], Czestochowa University of Technology [10], Canmet Energy 57 [6,[11][12][13], and Fundación Ciuden [14] have carried out oxy-fuel combustion 58 experimental tests with CFB combustors at scales up to 30 MW th . 59…”

Section: Introduction 32mentioning

confidence: 99%

Sulfur retention in an oxy-fuel bubbling fluidized bed combustor: Effect of coal rank, type of sorbent and O 2 /CO 2 ratio

¹

,

²

,

Garcı́a-Labiano

³

et al. 2014

View full text Add to dashboard Cite

In this work, SO 2 retention via calcium-based sorbents added in a continuous bubbling 17 fluidized bed combustor (~3 kWth) operating in oxy-fuel combustion mode is analyzed. 18Tests were performed at different operating temperatures with three sorbents, two 19 limestones and one dolomite, and with three coals, ranging from lignite to anthracite, to 20 analyze the influence of coal rank, type of sorbent, sorbent particle size, and O 2 /CO 2 21 feeding ratio on the sulfation process. 22It was found that the combustor temperature had a strong influence on the limestones 23 sulfur retention with a maximum at 900-925 ºC. The behavior of the limestones was 24 qualitatively similar with the three coals, attaining the highest sulfur retention values 25

“…One is a 20 MW th PC boiler and the other is a circulating fluidised bed (CFB) combustor of 15 MW th operating in air-mode and 30 MW th operating in oxy-mode. It is believed that an oxy-fuel CFB combustor will be an important candidate for new coal fired power plants [6][7][8] mainly because the circulation of solids in the combustor can help to an effective control of the temperature.…”

Section: Introductionmentioning

confidence: 99%

Calcium-based sorbents behaviour during sulphation at oxy-fuel fluidised bed combustion conditions

Garcı́a-Labiano

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et al. 2011

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“…Alstom [10], VTT and Foster Wheeler [11], Metso [12], Czestochowa University of Technology [7], and Canmet Energy [5,8,9,13] have experimented in oxyfuel combustion with CFB combustors at scales up to 4 MW th . The Fundación Ciuden [14] in Spain is developing two plants able to operate from conventional air combustion to oxy-fuel combustion.…”

mentioning

confidence: 99%

Optimum temperature for sulphur retention in fluidised beds working under oxy-fuel combustion conditions

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Garcı́a-Labiano

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et al. 2013

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Oxy-fuel combustion is one of the leading options for power generation with CO 2 capture. The process consists of burning the fuel with a mixture of nearly pure oxygen and a CO 2 -rich recycled flue gas, resulting in a product flue gas from the boiler containing mainly CO 2 and H 2 O. Among the possible boiler types, fluidised bed combustors are very appropriate for the oxy-fuel process because they allow the in-situ desulphurisation by feeding Ca-based sorbents into the combustor.In this work, the effect of the temperature of the combustor on the retention of the SO 2 generated in the combustion of two coals with very different sulphur content (a lignite and an anthracite) has been studied. The experimental facility used was a bubbling fluidised bed (BFB) combustor of ~3 kW th . Tests were conducted under oxy-fuel combustion mode and also under enriched-air combustion mode for comparison reasons. A Spanish limestone "Granicarb" was used as Ca-based sorbent for sulphur retention. The temperatures tested were between 800 and 970 ºC using Ca/S molar ratios between 0 and 3.It was found that in BFB combustors operating under oxy-fuel combustion conditions the optimum temperature to achieve the highest sulphur retention was 900-925 ºC, whereas operating with enriched air the optimum combustion temperature was ºC. Working at the optimum temperature, the SO 2 retentions were lower in oxy-fuel 2 combustion than in enriched air combustion conditions. It was also observed that working with lignite there was 10-15% of sulphur retention by coal ashes, however, working with anthracite the sulphur retention by coal ashes was negligible. This finding was independent of the combustion mode used, oxy-fuel or enriched air.

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