PM<sub>1</sub> formation characteristics during high-alkali coal combustion

ZHAO Jing; ZHANG Yufeng; WEI Xiaolin; LI Teng; BIN Feng

doi:10.11949/0438-1157.20190336

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PM₁ formation characteristics during high-alkali coal combustion

更新时间：2026-07-24

- PM₁ formation characteristics during high-alkali coal combustion
- CIESC Journal Vol. 70, Issue 8, Pages: 3113-3120(2019)
- 作者机构：
  
  1.中国科学院力学研究所高温气体动力学国家重点实验室，北京 100190
  2.中国科学院大学工程科学学院，北京 100049
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190336
  CLC： TQ 534.9
- Received：02 April 2019，
  
  Revised：2019-06-19，
  
  Online First：24 July 2026，
  
  Published：05 August 2019
- 稿件说明：
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赵京, 张玉锋, 魏小林, 李腾, 宾峰. 高碱煤燃烧过程中亚微米颗粒物PM₁的生成特性[J]. 化工学报, 2019, 70(8): 3113-3120 DOI: 10.11949/0438-1157.20190336.

ZHAO Jing, ZHANG Yufeng, WEI Xiaolin, LI Teng, BIN Feng. PM₁ formation characteristics during high-alkali coal combustion[J]. CIESC Journal, 2019, 70(8): 3113-3120 DOI: 10.11949/0438-1157.20190336.
赵京, 张玉锋, 魏小林, 李腾, 宾峰. 高碱煤燃烧过程中亚微米颗粒物PM₁的生成特性[J]. 化工学报, 2019, 70(8): 3113-3120 DOI: 10.11949/0438-1157.20190336. DOI：

ZHAO Jing, ZHANG Yufeng, WEI Xiaolin, LI Teng, BIN Feng. PM₁ formation characteristics during high-alkali coal combustion[J]. CIESC Journal, 2019, 70(8): 3113-3120 DOI: 10.11949/0438-1157.20190336. DOI：

摘要

高碱煤中通常具有较高的碱金属含量，其是煤燃烧过程中形成亚微米颗粒物PM

的主要前体。在一维高温沉降炉上，研究了不同反应温度和取样位置对高碱煤燃烧过程中PM

生成特性的影响，并分析了其质量粒径分布、产量以及矿物元素组成。同时研究了不同反应温度下高岭土对PM

高效吸附特性。结果表明：随着反应温度的增加，亚微米颗粒物PM

生成量逐渐降低，颗粒粒径向小粒径偏移。PM

生成主要受到Na、S等矿物元素的影响，随着温度升高，PM

中Na、S相对含量降低，Ca、Fe、Si等相对含量增加。硅铝氧化物在高温条件下形成的氧活性位能够高效捕获Na蒸气，进而抑制PM

生成。PM

生成特性主要受到高浓度的矿物元素均相成核、异相凝结沉积以及矿物元素蒸气与一些中间产物的相互作用的影响。

Abstract

High alkali coal generally has a high alkali metal content

which is the main precursor for the formation of submicron particulate matter PM

during coal combustion. However

the alkali and alkaline earth metals (AAEMs)

especially Na

result in a large amount of fine particulate matter (PM

) formation during coal combustion. In this work

two kinds of typical Z

hundong coal are selected

namely

ZD-1 and ZD-2. The pulverized coal is burned in an electrical heated drop-tube furnace with different temperature (1273 K

1373 K

and 1473 K). The mass size distribution and concentration of the particulates are analyzed by low pressure impactor (LPI)

and compositions are determined by energy dispersive spectrometry (EDS). The results indicate that the amounts of PM

produced by the submicron particles gradually decreases with increasing the reaction temperature. The size of PM

shifts to a smaller size. The formation of PM

is mainly affected by mineral elements such as Na and S. As the temperature increased

the relative contents of Na and S decreases in PM

and the relative contents of Ca

Fe and Si increase. The mass concentrations of Na and S in the collected particles depend upon the particle size

which are proportional to

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113942962&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=113942987&type=

6.51933336

4.06400013

for the particle sizes less than 0.4 μm. The PM

formation characteristics are mainly affected by the homogeneous nucleation and heterogeneous condensation of high concentrations of mineral elements

and the interaction between mineral elements with intermediate products during combustion. Active sites of oxygen formed by silicon-aluminum oxides at high temperature can efficientl

y capture Na vapor

thereby inhibiting PM

formation. This is one of the main reasons for the reduction of PM

at higher temperature.

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Keywords

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⁰

PM1 formation characteristics during high-alkali coal combustion

DOI：10.11949/0438-1157.20190336

摘要

Abstract

关键词

Keywords

references

PM₁ formation characteristics during high-alkali coal combustion