Study of microwave enhancement on char reducing NO

被引：0

作者：

Leng H. ^{[1
]}

Zhang T. ^{[2
]}

Xu L. ^{[1
]}

Zhang Y. ^{[1
]}

Du Q. ^{[1
]}

Gao J. ^{[1
]}

Wu S. ^{[1
]}

机构：

[1] School of Energy Science and Engineering, Harbin Institute of Technology, Harbin

[2] School of Vehicle and Energy, Yanshan University, Qinhuangdao

来源：

Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | 2021年 / 53卷 / 01期

关键词：

Char; Microwave; NO; Pore structure; Reactivity; Thermal effect;

D O I：

10.11918/201911027

中图分类号：

学科分类号：

摘要：

To explore a NO reduction technology of coal-fired industrial boilers with high efficiency and low cost, the applewood pyrolysis char and pyrolytic semi-char which are suitable for industrial applications were used as reducing agents, and the effect of microwave on the two samples reducing NO was studied in a microwave reaction system. For explaining the NO reduction experiment results, the infrared temperature measurement experiment, and the physical and chemical properties such as pore structure and TG reactivity was studied. The results show that, compared with the pyrolytic semi-char, the pore structure of applewood pyrolysis char is more developed with higher BET specific surface area and pore volume, it also ignites earlier, the combustion reaction rate reaches its maximum earlier and burns out first. However, its combustion intensity, reaction ability of earlier stage, flammability and combustion performance are weak. When the microwave is not applied, the NO reduction ability of applewood pyrolysis char is stronger than that of pyrolytic semi-char. Both the two samples have better NO reduction ability with microwave applying, and with the increase of microwave power, the NO reduction rate increases. The effect of microwave on pyrolytic semi-char reducing NO is stronger than that of applewood pyrolysis char. Meanwhile, infrared temperature measurement that the surface temperature of two samples both increases confirms that the microwave has an obvious thermal effect which could promote the NO reduction by char. © 2021, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.

引用

页码：46 / 54

页数：8

共 29 条

[1] BRIX J, NAVASCUES L G, NIELSEN J B, Et al., Oxy-fuel combustion of millimeter-sized coal char: Particle temperatures and NO formation, Fuel, 106, (2013)
[2] KONTTINEN J, KALLIO S, HUPA M, Et al., NO formation tendency characterization for solid fuels in fluidized beds[J], Fuel, 108, (2013)
[3] XU Jie, SUN Rui, ISMAIL T M, Et al., Nitrogen/NO conversion characteristics of coal chars prepared using different pyrolysis procedures under combustion conditions[J], Fuel, 211, (2018)
[4] ILLAN-GOMEZ M J, LINARES-SOLANO A, SALINAS-MARTINEZ DE LECEA C, Et al., Nitrogen oxide (NO) reduction by activated carbons. 1. The role of carbon porosity and surface area[J], Energy & Fuels, 7, 1, (1993)
[5] ARENILLAS A, RUBIERA F, PARRA J B, Et al., Influence of char structure on reactivity and nitric oxide emissions[J], Fuel Processing Technology, 77, (2002)
[6] SHEN Jun, LIU Jiaxun, ZHANG Hai, Et al., NO<sub>x</sub> emission characteristics of superfine pulverized anthracite coal in air-staged combustion, Energy Conversion and Management, 74, (2013)
[7] SHEN Jun, LIU Jiaxun, MA Junfang, Et al., Parametric study of reburning of nitrogen oxide for superfine pulverized coal[J], Energy Conversion and Management, 89, (2015)
[8] XU Jie, SUN Rui, ISMAIL T M, Et al., Effect of char particle size on NO release during coal char combustion, Energy & Fuels, 31, 12, (2017)
[9] WANG Shaobin, SLOVAK V, HAYNES B S., Kinetic studies of graphon and coal-char reaction with NO and O<sub>2</sub>: direct non-linear regression from TG curves[J], Fuel Processing Technology, 86, 6, (2005)
[10] GAO Jianmin, LI Ximei, WEI Zhenzu, Et al., Effect of microwave treatment on the reactivity of synthetic coal char for NO reduction, Energy & Fuels, 30, 12, (2016)

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