Effect of different ashing temperatures on the sintering characteristics of ash from combustion of coal and biomass blends

JING Ni-jie; ZHU Hong-mei; LI He-ping

Volume 45 Issue 3

Mar. 2017

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Article Navigation > Journal of Fuel Chemistry and Technology > 2017 > 45(3): 289-294

JING Ni-jie, ZHU Hong-mei, LI He-ping. Effect of different ashing temperatures on the sintering characteristics of ash from combustion of coal and biomass blends[J]. Journal of Fuel Chemistry and Technology, 2017, 45(3): 289-294.

Citation:

JING Ni-jie, ZHU Hong-mei, LI He-ping. Effect of different ashing temperatures on the sintering characteristics of ash from combustion of coal and biomass blends[J]. Journal of Fuel Chemistry and Technology, 2017, 45(3): 289-294.

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Effect of different ashing temperatures on the sintering characteristics of ash from combustion of coal and biomass blends

1.
Institute of Energy Utilization and Automation, Hangzhou Dianzi University, Hangzhou 310018, China
2.
Institute of Energy, Hangzhou Dianzi University, Hangzhou 310018, China

Funds:

Zhejiang Provincial Natural Science Foundation of China LQ14E060004sd

Received Date: 2016-10-12
Rev Recd Date: 2017-01-16

Available Online: 2021-01-23

Publish Date: 2017-03-10

Abstract

Abstract

Effect of ashing temperature on sintering behavior of ashes from combustion of coal and straw blends was investigated. Blends of a Chinese anthracite, Jincheng coal, and wheat straw were burned at three different temperatures. The resulting ash samples were then subjected to the sintering temperature measurement using a pressure-drop sintering device, morphological and mineralogical characterization with scanning electron microscope (SEM) fitted with X-ray energy dispersive spectroscopy (EDS) and X-ray diffractometry analyzer (XRD), respectively. For the same coal and biomass blends but different ashing temperatures, their sintering temperatures decrease in different extent. In addition, sintering temperatures of the blends under lower ashing temperature are lower than that under the higher ashing temperature. SEM imaging show that the texture of ash samples from lower ashing temperature is irregular, loose and more fibrous. The ashes under higher ashing temperature are mostly in spherical-shape, indicating ash melting has occurred during combustion. The XRD analysis reveals that blends of ash from Jincheng coal and straw under low ashing temperature has low sintering temperature due to more fluxing minerals, like K-containing mineral. The high sintering temperature of the ash blends depends on the Ca-containing minerals like anorthite with high melting temperature.
- biomass,
- coal,
- co-firing,
- sintering temperature,
- SEM-EDS,
- XRD

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References(25)

References

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