热重-红外联用(TG-FTIR)分析含油污泥-废轮胎混合热解特性  

Analysis the co-pyrolysis characteristic of oily sludge with waste tires using thermogravimetric analysis-Fourier transform infrared spectrometer(TG-FTIR)

作　　者：吕全伟[1,2] 林顺洪[1,2] 柏继松[1,2] 李长江[1,2] 江辽 李伟[1,2] 

机构地区：[1]重庆科技学院机械与动力工程学院,重庆401331 [2]重庆科技学院垃圾焚烧发电技术研究院,重庆401331

出　　处：《化工进展》2017年第12期4692-4699,共8页Chemical Industry and Engineering Progress

基　　金：重庆市科技研究基地能力提升(cstc2014pt-gc20001);重庆市高校成果转化(KJZH14108);重庆科技学院研究生科技创新计划(YKJCX1620306)项目

摘　　要：为含油污泥和废轮胎共热解工艺的开发与设计提供数据支撑,采用热重-红外联用(TG-FTIR)对含油污泥与废轮胎在不同混合比例下的热解动力学和气体析出特性进行了分析。研究发现,随着废轮胎掺混质量分数增加(从10%到50%),初始热解温度逐渐增加(从311.80℃到335.30℃),但热解特性指数也逐渐增加(从5.41×10^(–11)到1.53×10^(–10)),同时热解终温逐渐减小。由此表明混合热解可弥补单物料热解存在的不足。通过协同作用分析发现,不同的混合比例热解,相互作用及作用程度不同;利用Coats-Redfern法对混合热解过程动力学分析发现,第二阶段(500~800℃)所需的活化能最低,第三阶段(800~1200℃)最高;通过FTIR分析发现,热解主要生成H_2O、CO_2、CO、CH_4等物质;结合综合热解特性指数、相互作用和热解效率指数分析发现,对于以含油污泥处理为主的混合热解,掺混废轮胎比例为50%时可获得较多的可燃气体。In order to provide data support for the development and design of co-pyrolysis technology of oily sludge（OS）and waste tires（WT）,pyrolysis kinetics and evolved gas characteristics during co-pyrolysis of oil sludge with waste tires at various blend ratios were investigated using thermogravimetric analysis-Fourier transform infrared spectrometer（TG-FTIR）.It was found that with the WT blend ratio increases,the initial pyrolysis temperature increased（from 311.80℃ to 335.30℃）,but the pyrolysis characteristic index increased（from 5.41×10^（–11） to 1.53×10^（–10））and the terminated pyrolysis temperature decreases,which indicated that co-pyrolysis could make up for the shortage of the single material pyrolysis.Synergy analysis showed that there is a synergistic effect between the co-pyrolysis process of OS and WT,and the interaction and the degree of interaction were different for fferent blend ratios.The kinetic analysis of the co-pyrolysis process using the Coats-Redfern method di showed that the required of activation energy for the second stage（500—800℃）was the lowest and the third stage（800—1200℃）was highest during the whole reaction stage.From the FTIR analysis results,it was found that co-pyrolysis mainly produced H2O,CO2,CO,CH4.Combined with the comprehensive pyrolysis index,synergistic effect and pyrolysis efficiency index,it was found that more combustible gas could be obtained when the blend ratios of WT was 50%.

关 键 词：热重-红外联用 含油污泥 废轮胎 动力学分析 气体析出特性 相互作用 

分 类 号：X742[环境科学与工程—环境工程]