Chemical looping combustion of coal in interconnected fluidized bed with NiO/Al<sub>2</sub>O<sub>3</sub> oxygen carrier

GU Hai-ming; WU Jia-hua; SHEN Lai-hong; XIAO Jun

Volume 41 Issue 06

Jun. 2013

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GU Hai-ming, WU Jia-hua, SHEN Lai-hong, XIAO Jun. Chemical looping combustion of coal in interconnected fluidized bed with NiO/Al2O3 oxygen carrier[J]. Journal of Fuel Chemistry and Technology, 2013, 41(06): 649-656.

Citation:

GU Hai-ming, WU Jia-hua, SHEN Lai-hong, XIAO Jun. Chemical looping combustion of coal in interconnected fluidized bed with NiO/Al₂O₃ oxygen carrier[J]. Journal of Fuel Chemistry and Technology, 2013, 41(06): 649-656.

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Chemical looping combustion of coal in interconnected fluidized bed with NiO/Al₂O₃ oxygen carrier

1.
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;
2.
Institute of New Energy and Power Generation Technology, Central Research Institute, Dongfang Electric Corporation, Chengdu 611731, China

Received Date: 2012-12-06
Rev Recd Date: 2013-02-27
Publish Date: 2013-06-30

Abstract

Abstract

The chemical looping combustion of coal with NiO/Al₂O₃ oxygen carrier was experimentally investigated in a 1 kW_th interconnected fluidized bed. The carbon conversion η_C,coal, the conversion of gaseous products, the carbon capture efficiency η_C,cap and the coal combustion efficiency η_combust were calculated and discussed. Several influencing factors including the temperature t_FR, excess air coefficy α, the ratio of steam flow rate in the loopseal to the feed coal S_LS/C, the ratio of steam flow rate in the fuel reactor to the feed coal S_FR/C were examined. The results indicate that the increase in either t_FR or S_LS/C is favorable for increasing η_C,coal and the conversion of gas products from coal gasification. A larger α can also give a higher η_C,coal. With the S_FR/C increasing from 0.8 to 1.6, η_C,coal first increases and then decreases with the maximum at S_FR/C=1.2. η_combust has the same trends as η_C,coal; it is mainly affected by the loss of carbon in the fly ash. Contrary to α or S_LS/C, increasing T_FR can give a higher η_C,cap.
- oxygen carrier,
- interconnected fluidized beds,
- coal,
- chemical looping combustion

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References(22)

References

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