煤焦燃烧含氮硫气体生成的TG-MS定量分析  

QUANTITATIVE STUDY ON NITROGEN AND SULFUR GAS EMISSIONS IN COMBUSTION OF SHENMU COAL AND SHENMU CHAR BY TG-MS

作　　者：巩志强[1,2] 夏红德[2] 刘志成[2] 周托[2] 吕清刚[2] 

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院工程热物理研究所,北京100190

出　　处：《煤炭转化》2016年第1期86-91,共6页Coal Conversion

基　　金：中国科学院战略性先导科技专项(A类)项目(XDA07030100)

摘　　要：利用X射线光电子能谱(XPS),研究了神木烟煤及神木半焦中氮和硫赋存形态,并在热重-质谱(TG-MS)联用分析仪上,利用等效特征谱分析(ECSA)法对煤焦燃烧过程中的气体产物进行了定量分析,研究含氮、含硫气体在煤焦燃烧过程中的生成规律.结果表明,神木烟煤和神木半焦中有四种不同形态的含氮物质,分别为吡咯和吡咯酮氮、吡啶氮、季氮和氧化吡啶,不含胺类物质;神木半焦中各形态含氮物质的绝对含量都减小,而季氮和氧化吡啶相对含量增加;NO_x前驱物主要是NH_3和HCN,HCN的生成量要高于NH_3;神木烟煤和神木半焦含有三种不同价态的硫(S_1,S_2和S_3),+6价S_3最多,大部分硫以硫酸盐的形式存在,相比神木烟煤,神木半焦中S_3和S_1的绝对含量下降,而S_2绝对含量增加;检测到的SO_2前驱物有H_2S和COS,神木半焦燃烧过程中没有检测到COS和SO_2;神木烟煤燃烧过程中含氮、含硫气体生成量明显高于神木半焦,气体析出时间更早,气体析出时间段对应的温度区间更宽.X-ray photoelectron spectroscopy（XPS）was used to analyze the nitrogen and sulfur occurrence of Shenmu coal and Shenmu char.Gaseous products in combustion of Shenmu coal and Shenmu char were studied with online thermogravimetry-mass spectrum（TG-MS）system by equivalent characteristic spectrum analysis（ECSA）.The nitrogen morphology in Shenmu coal and Shenmu char is in the following descending order：N-5,N-6,N-Q and N-X.NH_3 and HCN are detected out as the major precursors of NO_x,while the volume of HCN is larger than that of NH_3 for both Shenmu coal and Shenmu char.NO and NO_2 emissions are lower for Shenmu char than those of Shenmu coal.The sulfur morphology in Shenmu coal and Shenmu char is in the following descending order：S_1,S_2 and S_3.H_2S and COS are detected out as the major precursors of SO_2 in combustion of Shenmu coal.COS and SO_2 are not detected out in the combustion of Shenmu char.Nitrogen and sulfur-containing gases are released earlier for Shenmu coal than that for Shenmu char,and the volumetric flow rates are much greater for Shenmu coal than that for Shenmu char.

关 键 词：等效特征谱分析 硫 氮 赋存形态 

分 类 号：TQ533.6[化学工程—煤化学工程] X784[环境科学与工程—环境工程]