摘要
本研究通过管式石英炉和烟气稀释系统,分别对两种烟煤和两种生物质在不同点火温度(300℃、500℃、700℃、900℃)下进行燃烧实验,并利用单颗粒气溶胶质谱仪在线分析燃烧排放气溶胶单颗粒的粒径分布和化学组分。结果表明,与生物质相比,烟煤燃烧排放的黑碳颗粒数量占比更高。生物质和烟煤排放的黑碳颗粒中,与碱金属(AM)、硝酸盐、硫酸盐、有机氮混合的颗粒数量占比均超过70%,与典型大气组分(如硫酸盐、硝酸盐等)混合的颗粒数量占比超过87.5%,与多环芳烃(PAH)、左旋葡聚糖(LG)混合的颗粒数量占比随温度升高而降低,与Cl^(-)混合的颗粒数量占比随温度升高而上升。本研究揭示点火温度对生物质和烟煤排放黑碳颗粒混合状态有显著影响,为深入理解燃烧排放颗粒物的物理和化学性质提供了重要依据。
This study focuses on the influence of combustion temperature on the mixing state of black carbon particles emitted from biomass and coal combustion.Combustion experiments were conducted on two types of bituminous coal and two types of biomass under a series of ignition temperatures(300℃,500℃,700℃,900℃)using a quartz tube furnace and a dilution system.The size and chemical composition of single particles were analyzed online using a single particle aerosol mass spectrometer.The research results show that compared with biomass combustion,the proportion of black carbon particles emitted from bituminous coal combustion is higher.The number fractions of alkali metals,nitrates,sulfates,and organic nitrogen in black carbon particles emitted from biomass and coal combustion exceed 70%,and those of typical atmospheric components(e.g.,sulfates,nitrates)even exceed 87.5%.Number fraction of polycyclic aromatic hydrocarbons and levoglucosan in black carbon particles decreases with increasing combustion temperature,while that of chlorine increases with increasing temperature.This study revealed a significant impact of ignition temperature on the mixing state of black carbon particles emitted from biomass and coal combustion,providing an important basis for a deeper understanding of the physical and chemical properties of particulate matter emitted from combustion processes.
作者
李禹潼
彭宵璁
傅玉珍
张国华
苏柏江
孙伟
黄心茹
宋建中
宋伟
毕新慧
LI Yutong;PENG Xiaocong;FU Yuzhen;ZHANG Guohua;SU Bojiang;SUN Wei;HUANG Xinru;SONG Jianzhong;SONG Wei;BI Xinhui(State Key Laboratory of Advanced Environmental Technology,Chinese Academy of Sciences,Guangzhou Institute of Geochemistry,Guangzhou 510640,Guangdong,China;University of Chinese Academy of Sciences,Beijing 100049,China;Hainan Research Academy of Environmental Sciences,Haikou 571126,Hainan,China)
出处
《地球化学》
北大核心
2025年第6期1025-1033,共9页
Geochimica
基金
国家自然科学基金项目(42192514和42077322)
广东省省级科技计划项目(2023B1212060049)联合资助。
关键词
黑碳
生物质
煤
混合状态
燃烧温度
black carbon
biomass
coal
mixing state
combustion temperature
