煤中环境敏感性痕量元素的挥发性研究

对我国西北部4个电厂原煤在实验室不同温度下进行燃烧实验，应用原子吸收光谱（AAS）、电感耦合等离子体原子发射光谱（ICP-AES）和仪器中子活化（INAA）等方法对煤和灰样中舡，Pb，Hk，Cd，Co，Se，Mn，U，Th，Be，Mo，Sb，Br和V等14种环境敏感性痕量元素的质量分数进行了测定，通过对比痕量元素在煤与灰样中质量分数的差异以及不同温度下痕量元素的挥发率，研究了在实验室不同温度下痕量元素的转化、分配规律，结合元素的赋存状态和物理化学特性，揭示了影响痕量元素燃烧迁移、分配规律的主要因素．

Volatility of environmentally-sensitive trace elements during coal combustion

Laboratory combustion tests of coal from four power plants in Northwest China were conducted in different temperature.The contents of environmentally-sensitive trace elements in four power plants coal such as As,Pb,Hg,Cd,Co,Se,Mn,U,Th,Be,Mo,Sb,Br and V were determined by atomic absorption spectroscopy(AAS),inductively coupled plasma atomic emission spectrometry(ICP-AES) and instrumental neutron activation analysis(INAA).By comparing the contents of trace elements in coal with that of trace elements in different ash and the volatility of different trace elements in coal and ash,the distribution characteristics of trace elements in combustion were studied.According to the modes of occurrence of trace elements in coal,the combustion mechanism of trace elements was researched.The modes of occurrence,physical and chemistry characteristics of trace elements in coal are the main controlling factors to trace elements volatility.