中国电机工程学报2012，Vol.32Issue(29)：52-58,7.
低阶煤O2/CO2气氛下燃烧生成颗粒物的特性
Fine Particles Formation During O2/CO2 Combustion of Low-rank Coal
摘要
Abstract
Two kinds of typical low-rank coal were burned in a drop tube furnace under different atmosphere. The produced particulate matters(PM) were collected by the cyclone and low pressure impactor(LPI). Transmission electron microscopy(TEM) and scanning electron microscope (SEM) were used to identify the morphology of the super-micron and submicron PM. SEM with an energy dispersive X-ray(SEM-EDX), TEM with an energy dispersive X-ray spectroscopy(TEM-EDS) and computer-controlled scanning electron microcopy(CCSEM) were applied to analyze the chemical composition in the ash. It has been confirmed that compared with air atmosphere, O2/CO2 atmosphere changes the generated fine ash particle size distribution and the concentration of the chemical composition, but the formation mechanisms are same for different atmosphere. For the case of the lignite with more amount of organic-associated minerals, O2/CO2 atmosphere increase the vaporization degree of Fe, Na/K sulfates, Al and Si, and thus increase the concentration of sub-micron particles. Also Fe is found to be a key element in the lignite. Oxy-fuel-combustion increases the attachment of vaporized Fe element to other particle.关键词
煤燃烧/矿物质/颗粒物/O2/CO2Key words
coal combustion/ minerals/ particle/ O2/CO2分类
能源科技引用本文复制引用
汪应红,王群英,付晓恒..低阶煤O2/CO2气氛下燃烧生成颗粒物的特性[J].中国电机工程学报,2012,32(29):52-58,7.基金项目
国家自然科学基金项目(50606035). （50606035）
