Citation: YU Zhi-hao, JIN Jing, ZHANG Rui-pu, ZHAO Bing, ZHU Yi-zhou, WANG Guang-xu. Influence of dolomite additive on the ash fusion and potassium fixation characteristics of rice straw[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(7): 795-803. shu

Influence of dolomite additive on the ash fusion and potassium fixation characteristics of rice straw

YU Zhi-hao ^1,2 ,
JIN Jing ^1,2,, ,
ZHANG Rui-pu ^1,2 ,
ZHAO Bing ^1,2 ,
ZHU Yi-zhou ^1,2 ,
WANG Guang-xu ^1,2

1.
School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2.
Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China

Corresponding author: JIN Jing, alicejin001@163.com
Received Date: 2 June 2020
Revised Date: 7 July 2020

Fund Project: the National Key R & D Program of China 2017YFF0209800Technology Development Project of University of Shanghai for Science and Technology 2019KJFZ192National Natural Science Foundation of China 51976129The project was supported by National Natural Science Foundation of China (51976129), the National Key R & D Program of China (2017YFF0209800), and Technology Development Project of University of Shanghai for Science and Technology (2019KJFZ192)

Figures(6)

The influence of dolomite as an additive on the slagging and potassium fixation characteristics of rice straw upon burning was investigated in a tube furnace; the slagging mechanism as well as the interaction between the rice straw ash and dolomite were explored by using the inductively coupled plasma optical emission spectrometry (ICP-OES) and X-ray diffraction (XRD). The results show that the slagging characteristics of rice straw are significantly influenced by adding 5% dolomite. Dolomite can greatly improve the potassium fixation ability, especially at 900-1000℃; moreover, the Mg and Ca elements rich in dolomite can react with SiO₂ in the rice straw ash, forming high-melting silicate minerals including diopside, monticellite and merwinite.
- rice straw,
- ash,
- slagging,
- dolomite,
- potassium fixation
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