Experimental Study on Biomass Char Combustion in O2/CO2 Atmosphere

Article Preview

Abstract:

Experiments of biomass char combustion in 10%O2/90%CO2, 21%O2/79%CO2, 10%O2/90%N2 and 21%O2/79%N2 atmospheres were performed in the fixed-bed reactor system at the temperature of 800°C-1200°C. The results show that at the same temperature, NO emission is higher in O2/N2 atmosphere than that in O2/CO2 atmosphere. The higher the O2 concentration is, the higher the NO yield is. As the temperature rises, the NO yield rises at first and then decreases at the same O2 concentration and atmosphere.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

136-141

Citation:

Online since:

November 2014

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2014 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] M.V. Gil, J. Riaza, L. Álvarez, Kinetic models for the oxy-fuel combustion and coal/biomass blend chars obtained in N2 and CO2 atmosphere, Energy. 48 (2012) 510-518.

DOI: 10.1016/j.energy.2012.10.033

Google Scholar

[2] A.G. Borrego, L. Garavaglia, W.D. Kalkreuth, Characteristics of high heating rate biomass char prepared under N2 and CO2 atmospheres, Int. J. Coal. Geol. 77 (2009) 409-415.

DOI: 10.1016/j.coal.2008.06.004

Google Scholar

[3] C.A. Wang, X.M. Zhang, Y.H. Liu, Pyrolysis and combustion characteristics of coals in oxyfuel combustion, Appl. Energ. 97 (2012) 264-273.

DOI: 10.1016/j.apenergy.2012.02.011

Google Scholar

[4] Z.Y. Luo, Y.R. Mao, X.C. Wu, Test study on and analysis of burning behavior for coal under atmosphere of O2/CO2, Thermal power generation. 06 (2004) 14-18.

Google Scholar

[5] J. Pang, J. Zhang, Effects of gas temperature fluctuation on the instantaneous pyrolysis of biomass pariticles, J. Anal. Appl. Pyrol. 108 (2014) 196-202.

DOI: 10.1016/j.jaap.2014.04.016

Google Scholar

[6] X.B. Wang, W.G. Xu, W.X. Jin, Effect of pyrolysis temperature on the chemical physical characteristics of biomass char, Journal of Fuel Chemistry and Technology. 41 (2013) 74-78.

Google Scholar

[7] G. Duman, M.A. Uddin, J. Yanik, The effect of char properties on gasification reactivity, Fuel Process. Technol. 118 (2014) 75-81.

DOI: 10.1016/j.fuproc.2013.08.006

Google Scholar

[8] J.Z. Liu, M.Q. Liu, W.D. Zhao, Thermogravimetric study on combustion of lignite semicoke, Thermal Power Generation. 42 (2013) 86-92.

Google Scholar

[9] K. Luo, H.P. Chen, X.H. Wang, Characterization of bio-char and its characteristics, Renew. Energ. 25 (2007) 17-22.

Google Scholar

[10] K.H. Hou, J.A. Drahun, A.V. Bridgwater, Influence of preparation conditions on the combustion reactivity of chars produced from the fast pyrolysis of biomass, Journal of Fuel Chemistry and Technology. 33 (2005) 450-455.

Google Scholar

[11] D.F. Liu, X.L. Wei, H.Z. Sheng, Thermogravimetric experimental study on combustion characteristics of semicoke, Journal of Engineering Thermophysics. 28 (2007) 229-232.

Google Scholar

[12] Z.J. Hu, Z.J. Liu, S.J. Wang, Characteristics of NO release during coal char combustiom, Chem. Eng. 34 (2006) 16-19.

Google Scholar

[13] W.Y. Liu, X. Gou, L.S. Liu, Experimental study on NO emission characteristics of corn stalk combustion in O2/CO2 and O2/N2 atmospheres, Anvanced Materials Research. 602-604 (2013) 1059-1063.

Google Scholar

[14] J.S. Xie, S.Q. Cheng, H.M. Zhang, Experimental study on NO emission characteristic: co-firing of biomass and coal in O2/CO2 atmosphere, Thermal Power Generation. 41 (2012) 32-36.

Google Scholar

[15] Y.J. Li, C.S. Zhao, L.B. Duan, A thermodynamic analysis of coal aombustion products in O2/CO2 atmosphere, Journal of Engineering for Thermal Energy and Power. 22 (2007) 332-335.

Google Scholar

[16] C.M. Chen, C.S. Zhao, K.L. Pang, Experimental study on NOX emission from coal combustion under O2/CO2 atmosphere, Journal of Southeast University(Natural Science edition). 35 (2005) 738-741.

Google Scholar

[17] Y.C. Zhang, J. Zhang, Y.X. Liu, NOX emission characteristics of blended coal combustion in O2/CO2 atmosphere, Journal of Southeast University(Natural Science edition). 40 (2010) 992-996.

Google Scholar