枣庄褐煤催化热解特性研究  

Catalytic pyrolysis characteristics of Zaozhuang lignite

作　　者：徐展 梁丽彤[2] 张乾[2] 刘建伟 唐国瑞 梁中亚 XU Zhan;LIANG Litong;ZHANG Qian;LIU Jianwei;TANG Guorui;LIANG Zhongya(Huadian Electric Power Research Institute Company Limited,310030 Hangzhou,China;State Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,030024 Taiyuan,China;College of Electrical and Power Engineering,Taiyuan University of Technology,030024 Taiyuan,China)

机构地区：[1]华电电力科学研究院有限公司,杭州310030 [2]太原理工大学省部共建煤基能源清洁高效利用国家重点实验室,太原030024 [3]太原理工大学电气与动力工程学院,太原030024

出　　处：《煤炭转化》2023年第1期19-26,共8页Coal Conversion

摘　　要：在格金反应器上对一种枣庄褐煤添加镍基催化剂(Ni(NO3)2·6H2O)进行催化热解,并对其添加催化剂前后热解产物焦油、半焦和气体等通过全二维气相色谱质谱联用仪(GC×GC-MS)、热重分析仪(TGA)、拉曼光谱仪和气相色谱仪(GC)等进行表征分析。催化热解产物分析结果表明,相较于原煤,添加镍基催化剂后半焦收率降低,焦油收率提高,其中半焦收率由82.72%降低到81.51%,焦油收率由8.21%增加到10.06%。焦油馏分分析结果表明,添加镍基催化剂后焦油品质提高,其中沥青含量由18.29%降低到13.88%,蒽油含量由9.39%增加到12.87%。拉曼光谱分析结果表明,添加镍基催化剂后半焦中3~5个芳环的芳香烃结构含量增加,六元以上芳香烃结构含量降低。综上分析结果推测出镍基催化剂在煤热解过程中促使煤大分子结构上连接稠环芳香结构(3~5个芳环)的脂肪桥键断裂,断键后的稠环芳香结构被CH_(3)·或H·稳定下来生成焦油或半焦。Catalytic pyrolysis of a kind of Zaozhuang lignite with nickel-based catalyst(Ni(NO3)2·6H2O)was carried out on a Gray-King reactor.Production like tar,char and gas generated from the coal pyrolysis with or without catalyst were characterized by a series of tests,involving the comprehensive two-dimensional gas chromatography analysis coupled with mass spectrometric detection(GC×GC-MS),thermogravimetric analysis(TGA),Raman spectrum analysis,and gas chromatography analysis(GC).The results show that compared with the raw coal pyrolysis without catalyst addition,when the nickel-based catalyst is added,the char yield decreases from 82.72%to 81.51%,while the tar yield increases from 8.21%to 10.06%.Meanwhile,the analysis of tar fractions reveals that the quality of tar is improved,the asphalt content is reduced from 18.29%to 13.88%,and the anthracene oil content increases from 9.39%to 12.87%.The results of Raman spectroscopy show that the nickel-based catalyst increases the content of fused-ring aromatic structures(3-5 aromatic rings)in char,while the content of six or more fused benzene rings decreases.Based on the above analysis results,it can be inferred that the nickel-based catalyst can promote the breakage of the aliphatic bridge bonds connecting the fused-ring aromatic structures(3-5 aromatic rings)on the coal macromolecular structure during the coal pyrolysis process.Then,the fused-ring aromatic structure after the bond breaking is stabilized by CH_(3)·or H·to generate tar or char.

关 键 词：格金干馏炉 褐煤 镍基催化剂 催化热解 焦油 

分 类 号：TQ530.2[化学工程—煤化学工程]