生物质室内燃烧产物的碳质特征及EC同位素组成

发布时间：2019-03-31 13:29

【摘要】：选取南京地区典型的生物质种类(水稻、芦苇、玉米、梧桐、桂花和白玉兰)进行室内模拟燃烧实验,同时采用Model 2001A热/光碳分析仪和元素分析-同位素质谱仪(EA/IRMS)分别对不同粒径段颗粒物中OC、EC的浓度和生物质燃烧的不同产物EC同位素组成进行了测定.结果表明,除芦苇秸秆外,其他各类生物质燃烧产生的OC排放因子均在0.43μm粒径段内达到最大;EC排放因子除梧桐和桂花树叶以外,最大值均分布在0.43μm和0.43~0.65μm粒径段内,其中,玉米秸秆燃烧产生的OC、EC排放因子均为最高.6种生物质燃烧产物中的碳质(OC、EC)浓度最大值均主要集中在0.43μm的亚微米粒径段上.玉米秸秆燃烧所产生的烟尘和烟灰中EC的同位素组成均高于其他生物质,除了生物质自身的组分会影响同位素分馏以外,燃烧过程的温度较高,也会促进秸秆和树叶发生热解从而形成碳同位素分馏.
[Abstract]:The typical biomass species (rice, Reed, corn, sycamore, osmanthus and magnolia) in Nanjing area were selected for indoor simulated combustion experiment. At the same time, Model 2001A thermal / photocarbon analyzer and elemental analysis-isotope mass spectrometer (EA/IRMS) were used to determine the concentration of OC,EC in different particle sizes and the isotopic composition of EC in different products of biomass combustion. The results showed that except Reed straw, the OC emission factors produced by other biomass combustion reached the maximum within 0.43 渭 m grain diameter. The EC emission factors were distributed in 0.43 渭 m and 0.43 ~ 0.65 渭 m grain diameter range except for the leaves of Indus and Osmanthus fragrans. Among them, the OC,EC emission factors from corn straw combustion were all the highest. Among the six biomass combustion products, the carbon (OC,) was the highest. The maximum concentration of EC was mainly concentrated in the submicron diameter range of 0.43 渭 m. The isotopic composition of EC in soot and soot produced by corn straw combustion is higher than that of other biomass, except that the components of biomass will affect isotope fractionation, the temperature of combustion process is higher than that of other biomass. It also promotes the pyrolysis of stalks and leaves to form carbon isotope fractionation.
【作者单位】：南京信息工程大学环境科学与工程学院;江苏省大气环境监测与污染控制高技术研究重点实验室;
【基金】：国家自然科学基金资助项目(41373023,91544229-02) 江苏省研究生科研与实践创新计划项目(SJZZ16_0157) 江苏省高校“青蓝工程”培养项目江苏省“333高层次人才”培养项目
【分类号】：X51

【相似文献】