Abstract:

In order to explore the synergistic effect of the functional groups in the co-pyrolysis of lignocellulosic biomass materials and hydrogen-enriched feedstock, Fourier transform infrared spectroscopy, thermogravimetric-mass spectrometry and pyrolysis gas chromatography-mass spectrometry were used for research. The Fourier transform infrared spectroscopy experiment showed that the main groups of the infrared spectrum of cellulose were CH₃, CH and CH₂. The thermogravimetric-mass spectrometry experiments of cellulose and polyethylene showed that the main hydrocarbon product was C₃H₈, and the addition of polyethylene increased the content of C₂H₄ remarkably. The pyrolysis gas chromatography/mass spectrometry combined experiment showed that the pyrolytic products of cellulose were mainly levoglucosan, and the addition of polyethylene made the content of hydrocarbons increase obviously. HZSM-5 catalyzed the increase of the relative content of aromatic products.The overall trend of the fluidized bed pyrolysis verification experiments are consistent with the PY-GC /MS experiments. On the basis of co-pyrolysis of cellulose and polyethylene, HZSM-5 can be added to achieve the best experimental results.

Key words: cellulose, co-pyrolysis, Fourier transform infrared spectroscopy (FTIR), synergistic effect

摘要：

为探究典型生物质原料纤维素与多氢原料聚乙烯共热解过程中官能团的相互作用及协同效应，本文利用傅里叶变换红外光谱仪、热裂解-气相色谱/质谱联用仪、热重-质谱及流化床对纤维素及其与聚乙烯混合共同热解实验产物进行分析。傅里叶变换红外光谱实验表明，纤维素红外谱图的主要基团为CH₃、CH、CH₂，多氢原料的加入均会提升碳氢基团的相对含量。热重-质谱实验表明纤维素的实验主要产物为C₃H₈，聚乙烯的加入会提升C₂H₄的离子流强度。热裂解-气相色谱/质谱联用实验表明，纤维素的热解产物以左旋葡聚糖为主，聚乙烯的加入使得纤维素中烃类的含量得到较大幅度的提升，HZSM-5的催化使得芳烃类产物的相对含量得到提升。流化床热解验证实验的总体趋势与PY-GC/MS实验一致，在纤维素与聚乙烯共热解的基础上再加入HZSM-5催化，可以得到最佳的实验效果。

关键词: 生物质, 共热解, 傅里叶变换红外光谱, 协同效应