TG-FTIR-MS联用技术对沼渣热解特性的分析  

Analysis of the pyrolysis characterization of biogas residue based on TG-FTIR-MS coupling technique

作　　者：孙洋 景淼 于倩倩 张晓梅 赵世玉 杨天华 李润东 SUN Yang;JING Miao;YU Qianqian;ZHANG Xiaomei;ZHAO Shiyu;YANG Tianhua;LI Rundong(School of Energy and Environment,Shenyang Aerospace University,Shenyang 110136,China;Liaoning Provincial Key Laboratory of Clean Energy,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学能源与环境学院,沈阳110136 [2]辽宁省清洁能源重点实验室,沈阳110136

出　　处：《农业工程学报》2023年第12期189-196,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金项目(52176195);辽宁省兴辽英才计划,XLYC200512。

摘　　要：为探究多种类沼渣废弃物的热解特性差异及在热解过程中逸出气相产物的主要成分和产量,该研究采用秸秆沼渣(SBR)、鸡粪沼渣(CMBR)、蛋白质类沼渣(PTBR)、脂肪类沼渣(FTBR)和淀粉类沼渣(STBR)为原料,利用TGFTIR-MS对其热解进行分析。结果表明:5种沼渣废弃物失重过程相差较大,但主要热解阶段相同,可分为3个阶段,即吸附水蒸发阶段、挥发分析出阶段及炭化阶段。SBR、CMBR主要热解失重发生在170~450℃之间,PTBR、FTBR、STBR主要热解失重发生在130~450℃之间,失重率大小依次为STBR、FTBR、SBR、PTBR和CMBR;根据热解特性指数D值分析,PTBR、FTBR、STBR及SBR热稳定性较低,易于热解,CMBR热稳定性较高。沼渣挥发分成分较为复杂,受热过程中逸出的气体主要成分是CO_(2)、H_(2)O、CH_(4)和CO等,其中CMBR热解CH_(4)的释放量较低,而PTBR、FTBR、STBR热解CH_(4)释放量较高,该结果可为沼渣处理提供参考。Pyrolysis characteristics of biogas residue can provide some ideas for resource utilization.In this study,the industrial and elemental analyses were conducted on five types of biogas residue raw materials,in order to explore the basic properties of biogas residue.The results showed that there was a high ash content of CMBR,whereas,the volatile content reached over 60%in the other types of biogas residue,except for CMBR.It infers that a higher proportion of biological oil and pyrolysis gas generated during the pyrolysis process.Then,TG-FTIR-MS was used to further evaluate the characteristics of different types of biogas residue raw materials.The experimental results show that the pyrolysis was divided into three stages:adsorption water evaporation(25-220℃),volatile evaporation(220-450℃),and carbonization(450 to 800℃).The weight loss rate was ranked in the order of STBR,SBR,FTBR,PTBR,CMBR,and the maximum weight loss rate was STBR,SBR,PTBR,FTBR,CMBR,due to the different internal components of five types of biogas residues.The comprehensive pyrolysis characteristic index D value demonstrated that the thermal stability was ranked as the CMBR,PTBR,FTBR,SBR,STBR.The STBR presented the lower thermal stability more conducive to the preparation of carbon materials as some soil amendments and heavy metal adsorbents.The volatile matter was gradually precipitated after 220℃to reach the peak at the highest pyrolysis weight loss rate.Then,the volatile matter content decreased to the lowest,as the temperature gradually increased to the final temperature.There was a relatively complex composition of volatile components generated by pyrolysis,particularly with the multiple peaks within the range of 1000-4000 cm^(−1).Volatility analysis showed that most of them occurred within about 10 minutes of pyrolysis.The pyrolysis range of the five types of biogas residues was between 220 and 450℃,indicating the highest production of H_(2)O.The other types of small molecule gases were also produced,depending on the type of materia

关 键 词：沼渣 热解 产物分析 热重-红外-质谱联用 

分 类 号：TK6[动力工程及工程热物理—生物能] S21[农业科学—农业机械化工程]