文献类型：期刊文献

中文题名：热解条件对煤中微量元素挥发性影响的实验研究

英文题名：INFLUENCE OF PYROLYSIS CONDITIONS ON VOLATILITY OF TRACE ELEMENTS IN COALS

作者：李扬[1];张军营[1];赵永椿[1];吴幼青[2];高晋生[2];郑楚光[1]

机构：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074;[2]华东理工大学资源与环境工程学院,上海200237

年份：2007

卷号：28

期号：Z2

起止页码：189

中文期刊名：工程热物理学报

外文期刊名：Journal of Engineering Thermophysics

收录：CSTPCD;;EI(收录号：20074610915818);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：国家重点基础研究发展规划项目(No.2004CB217704);国家自然科学基金项目(No.40672098)

语种：中文

中文关键词：煤;高温热解;微量元素;挥发率

外文关键词：coal;;pyrolysis;;trace element;;volatility

摘要：针对神府、北宿煤,在箱式高温电阻炉和快速热解设备上进行了慢速、快速高温热解实验,采用ICP-MS法对实验样品进行了微量元素含量测定,计算了Se,As,Cd,Ga,Pb,Zn,Ba,Cr,Be,Ni,Sr,Hf等元素的挥发率。研究了高温制焦过程中有害微量元素的挥发性规律。在950～1400℃温度范围内,部分微量元素的挥发率随热解终温的升高而增大;神府煤慢速、快速热解过程中,元素的挥发性规律较相似;慢速升温热解时微量元素的挥发率较大。北宿煤变质程度高于神府煤,热解过程中微量元素的挥发性降低。
Volatility of trace element Se,As,Cd,Ga,Pb,Zn,Ba,Cr,Be,Ni,Sr,Hf in Shenfu and Beisu coals during pyrolysis was studied.The pyrolysis experiments were carried out in box resistance reactor and rapid pyrolysis device at 950～1400℃.The contents of trace elements in coal and coal char were analyzed by Inductively Coupled Plasmas Mass Spectrometry(ICP-MS).The influences of temperature and heating rate on trace element releases were investigated.The results indicate that the release rate of some trace elements increases with the increasing pyrolysis temperature;but some are changeless.The trace element volatility of Shenfu coal in slow and rapid pyrolysis are similar to each other,but having great differences in Beisu coal char during rapid pyrolysis.Trace elements are more volatile with slow heating rate.The rank of Beisu coal is higher than Shenfu and the volatility of trace elements in Beisu coal reduces during pyrolysis.