Effect of Zr-TiO<sub>2</sub> catalyst on NO emission from coal-burning and its catalytic mechanism

WANG Shu-qin; FU Hao; CHENG Wei-liang; FU Yi

doi:10.1016/S1872-5813(21)60106-8

Volume 49 Issue 7

Jul. 2021

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Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(7): 909-917

WANG Shu-qin, FU Hao, CHENG Wei-liang, FU Yi. Effect of Zr-TiO2 catalyst on NO emission from coal-burning and its catalytic mechanism[J]. Journal of Fuel Chemistry and Technology, 2021, 49(7): 909-917. doi: 10.1016/S1872-5813(21)60106-8

Citation:

WANG Shu-qin, FU Hao, CHENG Wei-liang, FU Yi. Effect of Zr-TiO₂ catalyst on NO emission from coal-burning and its catalytic mechanism[J]. Journal of Fuel Chemistry and Technology, 2021, 49(7): 909-917. doi: 10.1016/S1872-5813(21)60106-8

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Effect of Zr-TiO₂ catalyst on NO emission from coal-burning and its catalytic mechanism

doi: 10.1016/S1872-5813(21)60106-8

WANG Shu-qin^{1, 2, 3
,
,},
FU Hao¹,
CHENG Wei-liang⁴,
FU Yi¹

1.
Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
2.
Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control，North China Electric Power University, Baoding 071003, China
3.
Key Laboratory of Regional Energy System Optimization of Ministry of Education, North China Electric Power University, Beijing 10084, China
4.
School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 10084, China

Funds: The project was supported by the National Basic Research Program of China (2018YFB060420103)

More Information

Corresponding author: E-mail: wsqhg@163.com
Received Date: 2020-12-24
Rev Recd Date: 2021-02-02

Available Online: 2021-05-27

Publish Date: 2021-07-15

Abstract

Abstract

The effect of desulfurizer, modified TiO₂ prepared by different methods on the NO emission from inferior coal burning and the adaptability of coal type were studied by using a tube furnace. The prepared Zr-TiO₂ and the char were characterized by XRD, BET, SEM, XPS, TGA, and the mechanism of denitrification was explored. The results show that the addition of desulfurizer can promote NO emission. When the combustion temperature is 850 ℃, oxygen flow rate is 40 mL/min and the desulfurizer is MgO, the NO emission is the lowest as the catalyst of 5% Zr-TiO₂ prepared by impregnation method is added, which is 51.0% lower than that with addition of pure TiO₂ and 84.6% lower than that with pure coal under the same conditions. The catalyst 5% Zr-TiO₂ can be applied to the coal with sulfur < 3% and ash < 30%, having a wide application range. The doping of Zr can inhibit the growth of grain, enhance the active component, increase the content of adsorbed oxygen, promote the transformation of the valence states of the elements, accelerate the devolatilization of volatiles, promote the combustion, increase the specific surface area of chars, and enhance the ability of heterogeneous reduction of chars.
- inferior coal,
- NO emission characteristics,
- Zr-TiO₂,
- catalysis

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References(18)

References

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