Experiment Research on Gasification Character of Pulve-rized Coal at Medium Temperature

Abstract

In this paper, effect of gasification temperature and residence time on gasification characteristics of typical pulverized coals under atmosphere pressure were studied on a one-dimensional electric heating drop tube furnace system to evaluate gasification characteristics of pulverized coal at medium temperature. The results show that the gasification rate increases with the raising of the gasification temperature under the temperature among 1150and1450, and as the temperature is above1350, the increasing rate become slower. Cold gas efficiency and carbon conversion meet the maximum value when the temperature approaches the ash fusion point of coal. With the further rise of the temperature, ash on the surface of the char starts to be melted, the gasification reaction rate decreases, due to the hindrance of the effective contact between coal char and gasification agent. The gasification efficiency would become steady when the residence time exceeds 8s.

Share and Cite:

T. Lou, Z. Zhang, J. Fan, H. An, Z. Zhou and P. Yue, "Experiment Research on Gasification Character of Pulve-rized Coal at Medium Temperature," Energy and Power Engineering, Vol. 5 No. 4B, 2013, pp. 315-318. doi: 10.4236/epe.2013.54B062.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] X. J. Wu, Z. X. Zhang, X. Y. Xu et al., “Experimental Study on Gasification and Ash Fusion Characteristics of Coal with High Ash Fusion Temperatures,” Journal of Chinese Society of Power Engineering, Vol. 31, No. 7, 2011, pp. 557-562.
[2] X. J. Wu, Z. X. Zhang, G. L. Piao et al., “Gasification Characteristics of Coal with High Ash Fusion Temperature in Lab-Scale Down-Flow Gasifier,” Journal of Combustion Science and Technology, Vol. 15, No. 2, 2009, pp. 182-186.
[3] Y. S. Shin, S. M. Choi and D. H. Ahn, “Pressurized Drop tube Furnace Tests of Global Coal Gasification Characteristics,” Energy Research, Vol. 24, 2000, pp. 749-758. doi:10.1002/1099-114X(200007)24:9<749::AID-ER614>3.0.CO;2-I
[4] X. J. Wu, Z. X. Zhang, G. L. Piao et al., “Experimental Study on Gasification Characteristics of Coal in Lab-scale Down Flow Gasifier,” Journal of Engineering Thermophysics, Vol. 29, No. 8, 2008, pp. 1431-1434.
[5] X. J. Wu. Experimental Study And Numerical Simulation of Pressured High Temperature Entrained Flow Coal Gasification With High Ash Fusion TmeperatureCoal,” PHD thesis of University of Shanghai for Science and Technology, 2007.
[6] G. Y. Chen, Z. X. Zhang, B. Q. Dai, et al., “Experiment Study on Solid Slag in an Entrained Flow Coal Gasifier,” Proceeding of the CSEE, 2009. Vol. 29, No. 23, pp. 73-79.
[7] G. Y. Chen, “Study and Numerical Simulation of Gasification Mechanism and Ash Characteristic in An Entrained Flow Pulverized Coal Gasification,” PHD thesis of University of Shanghai for Science and Technology, 2010.1.
[8] C. Lu, Z. X. Zhang, X. J. Wu, et al., “Experimental Study on Effects of Operation Parameters on Entrained Flow Pulverized Coal Gasification,” Clean Coal Technology, Vol. 16, No. 2, 2010, pp. 49-53.
[9] J. G. Lee, J. H. Kim, H. J. Lee, T. J. Park and S. D. Kim, “Characteristics of Entrained Flow Coal Gasification in a Drop Tube Reactor,” Fuel, Vol. 75, No. 9,1996, pp. 1035-1042. doi:10.1016/0016-2361(96)00084-1
[10] Y. J. Kim, J. M. Lee and S. D. Kim, “Modeling of Coal Gasification in an Internally Circulating Fluidized Bed Reactor with Draught Tube,” Fuel, Vol. 79, 2000, pp. 69-77. doi:10.1016/S0016-2361(99)00128-3
[11] Y. J. Kim, S. H. Lee and S. D. Kim, “Coal gasification characteristics in a Downer Reactor,” Fuel, No. 80, 2011, pp.1915-1922. doi:10.1016/S0016-2361(01)00052-7

Copyright © 2024 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.