水热处理对褐煤提质及其热解产物分布的影响  

Effects of hydrothermal treatment on lignite upgrading and distribution of pyrolysis products

作　　者：刘鹏[1] 王岚岚[2] 张德祥[1] 鲁锡兰[1] 潘铁英[2] 

机构地区：[1]华东理工大学煤气化及能源化工教育部重点实验室,上海200237 [2]华东理工大学分析测试中心,上海200237

出　　处：《洁净煤技术》2015年第1期45-49,共5页Clean Coal Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB201304)

摘　　要：为了提高褐煤利用效率,强化水处理技术对褐煤提质的影响,采用高压反应釜对褐煤进行水热处理,考察了水热处理条件对煤低温热解产物分布的影响。结果表明,处理后煤样的碳、氢含量增加,氧含量降低,水热处理对煤样有脱氧提质作用。处理温度为260℃时,热解焦油产率相对提高19%,热解水产率降低了20%。通过固体核磁共振（NMR）分析可知,水热处理温度在180~260℃条件下,煤中分子有机结构中的弱化学键有一定断裂,含氧官能团逐步减少,热解水产率降低;芳香碳含量基本不变,芳香侧链增加,热解时容易断裂形成焦油,达到提高煤焦油产率之目的。但水热处理温度过高时,其热解焦油产率下降。In order to improve lignite upgrading efficiency and optimize hydrothermal treatment,the hydrothermal treatment test were carried out in autoclave.The influence of hydrothermal treatment conditions on pyrolysis coal tar yield were investigated.After treatment,the C and H contents increased,the O content decreased,so the hydrothermal treatment had deoxygenation and upgrading effects. The coal tar yield was raised by 19% and the pyrolysis water yield was decreased by 20% at 260 ℃. Through the solid state NMR analysis,when the treated temperature ranged from 180 ℃ to 260 ℃,the weak bonds in coal molecule were broken and the oxygen functional groups decreased gradually.The side chain of aromatic rings increased while the overall aromatic carbon remained unchanged. So the coal tar yield was increased,the pyrolysis water yield was decreased and the semicoke yield was almost the same during coal pyrolysis.However,when the treated temperature was too high,the coal tar yield began to decrease.

关 键 词：褐煤 脱氧提质 低温热解 焦油 固体核磁 

分 类 号：TD849[矿业工程—煤矿开采]