Microscopic characteristics and differences of fine primary particles emitted from coal⁃fired power plant and residential coal combustion

被引：0
|
作者：
Zhang Y. [1 ]
Liu L. [1 ]
Yan Q. [2 ]
Kong S. [2 ]
Li W. [1 ]
机构：
[1] School of Earth Sciences, Zhejiang University, Hangzhou
[2] School of Environmental Studies, China University of Geosciences, Wuhan
来源：
Meitan Xuebao/Journal of the China Coal Society | 2022年 / 47卷 / 12期
关键词：
carbonaceous particle; coal-fired power plant; individual particles; residential coal combustion; source emissions;
D O I：
10.13225/j.cnki.jccs.PE21.2035
中图分类号：
学科分类号：
摘要：
Coal-fired power plants and residential coal combustion are the main contributors to the air pollution in China, and the understanding of the microscopic characteristics, such as morphology, composition, and mixing state, of primary individual particles is crucial to analyze the sources of aerosol particles. This study employed the instruments of transmission electron microscopy and energy-dispersive X-ray spectrometer to obtain the microscopic characteristics of individual particles emitted from coal-fired power plants and residential coal combustion. The results reveal that non-carbonaceous particles, such as mineral particles and S - rich particles, are dominated in the emissions from coal-fired power plants, accounting for 93.6% of the total analyzed particles. The mineral particles are mainly composed of Si, O, and metal elements, and the S-rich particles are mainly composed of S element. Residential coal combustion mainly emits carbonaceous particles, including black carbon and organic particles, which is obviously different from those from coal-fired power plants. It was found that the individual particles from flaming and smoldering phases of residential coal combustion are different. The flaming phase emits abundant black carbon, which accounts for 96. 9% of the total analyzed particles. Black carbon is mainly composed of C element and exhibits chain-like or cluster-like shape. However, the smoldering phase mainly emits organic particle, which is mainly composed of C element and exhibits round or nearly round shape. The size distribution analysis reveals that the fine particles emitted from coal-fired power plants exhibit a peak at around 700 nm, which is higher than 500 nm for residential coal combustion. This study reveals that different combustion conditions are the key reasons why there are the huge differences between individual particles emitted from coal-fired power plants and residential coal combustion. © 2022 China Coal Society. All rights reserved.
引用
收藏
页码：4388 / 4394
页数：6
相关论文
共 32 条
  • [1] (2021)
  • [2] ZHU Fahua, XU Yueyang, SUN Zunqiang, Et al., Practice and enlightenment of ultra-low emission and energy-saving retrofit of coal-fired power plants in China, Electric Power, 54, 4, pp. 1-8, (2021)
  • [3] ZHAO Yongchun, MA Siming, YANG Jianping, Et al., Status of ultra-low emission technology in coal-fired power plant, Journal of China Coal Society, 40, 11, pp. 2629-2640, (2015)
  • [4] CUI Jiansheng, REN Zhenhai, QU Jiabao, Et al., High resolution power emission inventory for China based on CEMS in 2015, China Environmental Science, 38, 6, pp. 2062-2074, (2018)
  • [5] ZHU X, YUN X, MENG W, Et al., Stacked use and transition trends of rural household energy in mainland China, Environmental Science & Technology, 53, 1, pp. 521-529, (2018)
  • [6] TAO S, RU M Y, DU W, Et al., Quantifying the rural residential energy transition in China from 1992 to 2012 through a representative national survey, Nature Energy, 3, 7, pp. 567-573, (2018)
  • [7] WU D, ZHENG H, LI Q, Et al., Toxic potency-adjusted control of air pollution for solid fuel combustion, Nature Energy, 46, pp. 97-108, (2022)
  • [8] ZHANG Y X, SCHAUER J J, ZHANG Y H, Et al., Characteristics of particulate carbon emissions from real-world Chinese coal combustion [J], Environmental Science & Technology, 42, 14, pp. 5068-5073, (2008)
  • [9] ZHANG Xiaoye, SUN Junying, WANG Yaqiang, Et al., Factors contributing to haze and fog in China, Chinese Science Bulletin, 58, 13, pp. 1178-1187, (2013)
  • [10] ZENG X, KONG S F, ZHANG Q, Et al., Source profiles and emission factors of organic and inorganic species in fine particles emitted from the ultra-low emission power plant and typical industries, Science of the Total Environment, 789, pp. 13-29, (2021)
1234