热分析-质谱法研究汽车废轮胎热解行为及反应动力学

发布时间：2018-01-25 02:44

本文关键词： 废轮胎热重-差示扫描量热-质谱联用热解特性热解气热解动力学　出处：《过程工程学报》2016年06期 　论文类型：期刊论文

【摘要】：采用热重-差示扫描量热-质谱(TG-DSC-MS)联用技术研究了汽车废旧轮胎在氩气气氛中的热解特性及热解气种类.结果表明,废旧轮胎在热解过程中存在一个不明显失重阶段(200～300℃)和2个明显失重阶段,分别为油类添加剂析出过程和天然橡胶热解(300～400℃)、合成橡胶热解(400～550℃)过程.随升温速率增大,轮胎起始热解温度升高,热解区间向高温方向移动,最大热解速率增加.热解过程中共检测到H_2,H_2O,CO,CO_2,CH_4,C_2H_2,C_2H_6七种热解气,其中H_2O与CO存在2个析出峰,CO_2存在3个析出峰,CO析出量最高.采用Ozawa峰值法与Ozawa等转化率法得到轮胎天然橡胶热解阶段的活化能介于55~60k J/mol之间,而合成橡胶热解阶段的活化能介于110~115 k J/mol之间.
[Abstract]:Thermogravimetric differential scanning calorimetry - mass spectrometry (TG-DSC-MS) combined with technology of automobile tires in argon atmosphere in the pyrolysis and pyrolysis species. The results show that the existence of a waste tire is not obvious weight loss stages during the pyrolysis process (200 to 300 DEG C) and 2 obvious weight loss stages, respectively. As an oil additive precipitation process and pyrolysis of natural rubber (300 to 400 DEG C), synthetic rubber pyrolysis (400 to 550 DEG C). With the increase of heating rate, the initial tire pyrolysis temperature, pyrolysis interval shift to high temperature. The maximum pyrolysis rate increased. The pyrolysis process were detected in H_2, H_2O, CO, CO_2, CH_4 C_2H_2, C_2H_6, seven kinds of pyrolysis gas, where H_2O and CO are 2 Precipitation peaks, CO_2 3 precipitation peaks, the precipitation of CO was the highest. The Ozawa peak method and Isoconversional method of Ozawa natural rubber tire stages pyrolysis activation energy is 55~60k J/mol The activation energy of the pyrolysis phase of synthetic rubber is between 110~115 K J/mol.

【作者单位】：安徽工业大学能源与环境学院;
【基金】：国家自然科学基金资助项目(编号:51376007;51206001) 安徽省自然科学基金资助项目(编号:1608085ME104) 安徽省大学生创新创业训练计划资助项目(编号:201410360060)
【分类号】：X705;O643.1
【正文快照】： 随着汽车制造业的蓬勃发展,橡胶制品得到迅速发展,但废轮胎也日益增多.据统计,我国废旧轮胎产量约为100万t/a,而欧洲及北美地区更是达到250万t/a[1].废轮胎属难熔或不熔的高分子弹性体,在自然条件下极难分解,露天堆积不仅占用大面积土地,更会污染环境并危害人类健康.废旧轮胎

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