Formation of Nitrogen-Containing Organic Aerosol during Combustion of High-Sulfur-Content Coal

Formation of Nitrogen-Containing Organic Aerosol during Combustion of High-Sulfur-Content Coal
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高硫煤燃烧过程中含氮有机气溶胶的形成

DOI:
10.1021/acs.energyfuels.7b02273
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发表时间:
2017
期刊:
影响因子:
5.3
通讯作者:
Biswas, Pratim
Biswas, Pratim
中科院分区:
工程技术3区
文献类型:
--
作者:
Wang, Xiaofei;Wang, Hanliu;Jing, He;Wang, Wei-Ning;Cui, Weidong;Williams, Brent J.;Biswas, Pratim

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含碳气溶胶,包括有机碳气溶胶和黑碳气溶胶,是由煤粉燃烧产生的,即使在燃料稀薄的条件下。这些含碳气溶胶对人体健康尤其有害。本文研究了高硫煤燃烧过程中排放的有机气溶胶的化学组成和形成途径。结果表明,含氮有机质在高硫煤燃烧产生的有机气溶胶质量中所占比例较大,而在低硫煤燃烧产生的有机气溶胶质量中所占比例较小。燃烧含硫量较高的煤时,有机气溶胶的形成明显增强。有机气溶胶质量与硫酸盐浓度之间存在很强的相关性。提出酸性硫酸盐颗粒通过酸碱中和反应将煤热解过程中产生的含氮有机挥发物吸附到颗粒相中。
Carbonaceous aerosols, including organic carbon aerosols and black carbon aerosols, are produced by the combustion of pulverized coal even under fuel-lean conditions. These carbonaceous aerosols can be particularly hazardous to human health. In this study, the chemical compositions and formation pathways of organic aerosols emitted during the combustion of high-sulfur-content coals were investigated. It was found that nitrogen-containing organic matter contains a significant proportion of organic aerosol mass from the combustion of high-sulfur-content coals, which is not the case for organic aerosols generated during the combustion of low-sulfur-content coals. The formation of organic aerosols was significantly enhanced when higher-sulfur-content coal was burned. A strong correlation between organic aerosol mass and the sulfate concentration was observed. It is proposed that acidic sulfate particles absorb the nitrogen-containing organic volatiles produced by coal pyrolysis onto the particle phase through acid–base neutralization reactions.
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