甘蔗渣与褐煤共热解半焦的特性  

Characteristics of co-pyrolysis char of sugarcane bagasse and lignite

作　　者：易霜[1] 何选明[1] 郑辉[1] 林红涛 李翠华[1] 李冲[1] 

机构地区：[1]湖北省煤转化与新型碳材料重点实验室,武汉科技大学化学工程与技术学院,湖北武汉430081

出　　处：《化工进展》2016年第10期3149-3154,共6页Chemical Industry and Engineering Progress

摘　　要：利用自制的干馏装置进行褐煤与甘蔗渣的低温共热解实验,并探究甘蔗渣的添加量对热解产物产率及半焦品质的影响。研究结果表明,在甘蔗渣掺混比为20%时,产物产率的实验值与理论值偏差达到最大,此时焦油产率的实验值比理论值高出9.61%;FTIR检测表明半焦中主要含有—OH、C=C和C=O官能团,且甘蔗渣的添加能促进半焦中苯类化合物转化为其他类低分子化合物;SEM检测表明褐煤与甘蔗渣共热解半焦比煤样单独热解半焦孔隙发达;BET分析表明甘蔗渣与褐煤的相互作用不仅能提高共热解半焦比表面积,而且能改善孔径分布,使共热解半焦孔径有减小的趋势。半焦吸附重金属离子实验表明未经任何处理的煤半焦及甘蔗渣半焦对铅离子去除率分别达到78.42%和87.80%。Low-temperature co-pyrolysis of lignite and sugarcane bagasse was undertaken in a homemade carbonization apparatus to study the influence of different sugarcane bagasse ratios in lignite on the yields and quality of chars. The results show that the experimental value of yields deviated from the theoretical values most conspicuously at a mixing ratio of 20%,in which the experimental value of tar yield was 9.61% higher than the theoretical value; FTIR indicated that chars mainly contained —OH,C=C,C=O functional groups and sugarcane bagasse promoted benzene compounds in char transforming into low molecular compounds; SEM images demonstrated that co-pyrolysis char had well-developed pore structure compared with coal char;BET revealed that the interaction of sugarcane bagasse and lignite not only improved the surface area of co-pyrolysis char,but also improved the pore size distribution by reducing pore average width; chars adsorption experiments showed that the lead ion removal rate of coal char and bio-char reached 78.42% and 87.80% respectively.

关 键 词：褐煤 生物质 共热解 半焦 吸附 

分 类 号：TK6[动力工程及工程热物理—生物能] TQ530.2[化学工程—煤化学工程]