纤维素与废轮胎微波共热解规律及产物特性

Pyrolysis Behavior and Product Characteristics of Microwave co-Pyrolysis of Cellulose and Waste Tire

采用热重分析仪(TG)、微波共热解实验装置、红外分析仪(FTIR)以及气质联用仪(GC-MS)考察了纤维素与废轮胎微波共热解过程变化规律及产物生成特性.研究表明,不同共混比例[有效氢碳比(H/Ceff)为0.2,0.4,0.6]下热失重残炭率均低于理论值,微波共热解产物热解油产率相比理论值分别提高了4.7%,6.4%和6.0%,说明纤维素与废轮胎共热解过程存在协同效应,有利于液体产物热解油的生成.废轮胎微波热解油中检测到了79.5%的多环芳烃(PAHs),由于纤维素的加入氧自由基的作用使得热解油中PAHs完全消失,转化为高附加值的含氧有机物,热解油品质得到提高.

The pyrolysis behavior and product characteristics of microwave co-pyrolysis of cellulose and waste tire were investigated by thermogravimetric analyzer（ TG）,the equipment of microwave co-pyrolysis,Fourier transform infrared analyzer（ FTIR） and gas chromatography/mass spectrometry（ GC-MS）. The results show that the contents of residual carbons from different H/Ceffratios（ 0. 2,0. 4,0. 6） are lower than the theoretical values. Compared with the theoretical values at H/Ceffratios（ 0. 2,0. 4,0. 6）,the yields of pyrolysis oil increase by 4. 7%,6. 4% and 6. 0%,respectively,indicating the occurrence of synergistic effect during the copyrolysis of cellulose and waste tire. The relative content of 79. 5% for polycyclic aromatic hydrocarbons（ PAHs） was observed in pyrolysis oil of waste tire. However,the PAHs were totally disappeared and converted into valuable oxygen containing compounds after the adding of cellulose,resulting in the quality improvement of pyrolysis oil.