中文摘要：

在高温沉降炉中进行了大同烟煤的燃烧实验，燃烧气氛为O2／N2=21：79、O2／CO2=21：79和O2／CO2=29：71，采用旋风分离器和DGI（承重撞击器）系统分别收集燃烧产生的粗灰及颗粒物，并应用ICP—MS测量其中As和Pb两种元素的含量。实验结果表明，相较于O2／N2气氛，O2／CO2气氛会抑制颗粒物的生成，在O2／CO2燃烧气氛下，提高氧浓度将促进颗粒物的生成；O2／CO2气氛相较于O2／N2气氛，会提高颗粒物中As、Pb的浓度，特别是PM0.2-0.5；O2／CO2气氛下，提高氧气浓度将降低颗粒物中As、Pb的浓度，特别是PM0．2-0．5；所有燃烧工况下，As、Pb两种元素都大量富集于颗粒物之上，颗粒粒径越小，富集现象越明显，并在PM0．2-0．5处显著增强。

英文摘要：

The combustion of Da Tong bituminous was conducted in a high-temperature drop tube furnace （DTF）, in which, the combustion atmospheres were O2/N2=21：79, O2/CO2=21：79 and O2/CO2=29：71. the combustion residues were collected by cyclone and DGI （Dekati Gravimetric Impacter） system, and the concentration of As, Pb in these collections was measured by ICP-MS. The experiment results indicate that： the particulate matters generated under O2/N2 are more than that under O2/CO2, and in O2/CO2, the higher oxygen concentration is, the more particulate matters generate. Compare to O2/N2, O2/CO2 improve the concentration of As and Pb in particulate matters, especially in PM0.2-0.5. Under O2/CO2, with the oxygen concentration increasing, the concentration of As and Pb in particulate matters decreases, especially in PM0.2-0.5. The enrichment of As and Pb in particulate matters is significant, and the finer the particle is, the more obvious the enrichment is, and a surge can be observed in PM0.2-0.5.