氧燃烧方式下重金属Se挥发行为的研究  

STUDY ON THE VOLATILIZATION BEHAVIOR OF SE UNDER OXYGEN-COMBUSTION ATMOSPHERE

作　　者：熊全军[1] 邱建荣[1] 徐朝芬[1] 王泉海[1] 刘豪[1] 陈永利[1] 徐志英[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《工程热物理学报》2006年第z2期195-198,共4页Journal of Engineering Thermophysics

基　　金：高等学校青年教师教学科研奖励计划项目(2001);国家自然科学基金资助项目(No.50525619);国家自然科学基金重点基金资助项目(No.90410017)

摘　　要：在氧燃烧方式和空气燃烧方式下对Se的氧化物及其与CaO的混合物进行了热重红外实验,通过TG、DTG、DSC以及X射线衍射分析考察了升温速率、气氛和矿物质对重金属Se在燃烧过程中挥发行为的影响。实验结果显示:氧燃烧气氛下se02的挥发率以及释放总量较之空气气氛发生了较大变化,氧燃烧气氛下,Se化合物的释放总量比空气气氛下低;在同一气氛下,钙硒比越大,钙的固硒效果越明显;升温速率对SeO2挥发的影响较小,主要在于加速或推迟其挥发;氧燃烧方式有助于抑制重金属Se的释放。The FTIR-TGA experiments on SeO2 and the mixture of it and CaO were carried out in air and oxygen-combustion atmospheres. By using TG/DTG/DSC and XRD analyzer, the influence of heating rate,atmospheres and minerals on the volatilization behavior of Selenium during combustion were investigated.The results indicated that the volatilization ratio and emission of Selenium differed under various atmospheres. Under oxygen-combustion atmosphere,the emission of SeO2 were lower than that under air atmosphere. Under the same atmosphere, the fixation effect of Selenium using CaO was more obvious when Ca: Se grew. The heating rate imposed little on the volatilization of Selenium,only promoting or deferring it. Oxygen-combustion helped to restrain the volatilization of Selenium.

关 键 词：氧燃烧 重金属 SE 挥发行为 

分 类 号：X701[环境科学与工程—环境工程]