文献类型：期刊文献

中文题名：高温热解神府煤中微量元素释放规律的研究

英文题名：Volatility of trace elements in the coal from Shenfu during pyrolysis

作者：李扬[1];张军营[1];吴幼青[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：2008

卷号：36

期号：10

起止页码：118

中文期刊名：华中科技大学学报（自然科学版）

外文期刊名：Journal of Huazhong University of Science and Technology(Natural Science Edition)

收录：CSTPCD;;EI(收录号：20084811749729);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计划资助项目(2004CB217704);国家自然科学基金资助项目(40672098)

语种：中文

中文关键词：煤;高温热解;微量元素;挥发性;温度;升温速率

外文关键词：coal; pyrolysis; trace element; volatility; temperature; heating rate

摘要：采用箱式高温电阻炉和小型快速热解设备对神府煤进行热解，系统研究了在950～1300℃下慢速、快速热解过程中，温度和升温速率等对多种微量元素释放规律的影响．对实验样品的ICP—MS测试结果进行计算，分析了元素的挥发率．结果表明：Cd，Se，As，Ga等表现了较强的挥发性；Zn，Cr，Sr，Ni，Be等次之；Ba，Hf等则表现为不易挥发特性；多数微量元素的挥发性随温度的升高而有不同程度的增加．比较挥发率的数值得出，慢速升温过程中，在950～1300℃，各微量元素的析出率增加了1％～24％；快速升温过程中，则相应地增加了2％～21％；慢速升温热解时挥发率比快速时高3％～7％．
The pyrolysis experiments were carried out in the box resistance reactor that was heated in 950-1 300 ℃ rapidly to study the volatility of the trace elements in the coal from Shenfu. The content of trace element in coal char was analyzed by inductively coupled plasmas mass spectrometry （ICP-MS）. The influences of high temperature, heating rate on trace elements release was investiga- ted. The results indicate that Cd, Se, As, Ga have higher volatility during pyrolysis; and Ba, Hf are the lowest; while Zn, Cr, Sr, Ni, Be and Th are in the middle between the two ranges. Most trace elements release increase with the increasing pyrolysis temperature; the trace elements volatility increase by 1 %-24 % or 2 %-21 % with slow or fast heating rate. Trace elements are more volatile with slow heating rate; the difference is about 3 %-7%.