Ag/HZSM-5在线催化裂解木粉–聚丙烯复合材料研究
In Line Wood/Polypropylene Composite Pyrolyses and Ag/HZSM-5 Conversion of the Pyrolysis Vapors
DOI: 10.12677/MS.2018.84043, PDF,    国家自然科学基金支持
作者: 张志峰, 谭 顺, 张志军：东北林业大学，生物质材料科学与技术教育部重点实验室，黑龙江 哈尔滨
关键词: 木塑复合材料；热解；催化裂解；沸石；Wood-Plastic Composites； Pyrolysis； Catalytic Cracking； Zeolite
摘要: 作为生物质全组分利用的高效途径，木塑复合材料(WPC)的应用日趋广泛。然而，经多次循环利用后的WPC由于大分子降解导致力学性能降低而不适于继续用作材料，作为一种新型的固体废弃物必须对其进行无害化处理。用裂解–气相色谱/质谱联用法(Py-GC/MS)在550℃下对木粉–聚丙烯复合材料进行了快速热解和热解产物的在线分析，并考察了不同银负载量的Ag/HZSM-5对WF-PP快速热解挥发性产物的催化效果。结果表明：WF-PP热解得到较高产率的脂肪烃；HZSM-5和不同银负载量的Ag/HZSM-5催化剂均使芳香烃产率明显增加；经Ag/HZSM-5催化后呋喃类化合物的产率显著提高，含氧木质素衍生物含量降低，从而提高了生物油的热值，降低了黏度。经HZSM-5催化后产物中乙酸的含量降低。
Abstract: As an efficient way of using all-components of biomass, wood plastic composite (WPC) has gradually gained its wide applications. However, after times of recycling and reuse, serious deterioration resulting from its macromolecular degradation made WPC unsuitable to use as a material and became a new solid waste need to be disposed harmlessly. Wood powder-polypropylene composite was catalytically pyrolysed at 550˚C using analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) in order to investigate the effect of catalysts on bio-oil properties. The catalysts were zeolite HZSM-5 and Ag modified HZSM-5. The influence of catalysts on pyrolysis products was observed through the yields of aliphatic hydrocarbon, aromatic hydrocarbons, furan, aromatic compound, lignin-derived compounds, ketone and acetic acid. Results showed that the yields of aliphatic hydrocarbon were very high. The yields of aromatic hydrocarbons and furan were increased, while oxygenated lignin derivatives were decreased compared to the non-catalytic pyrolysis when HZSM-5 and Ag modified HZSM-5 were used, thus indicating that bio-oil heating value and viscosity are improved. In particular, Ag modified HZSM-5 can improve the yields of furan significantly. In addition, the HZSM-5 zeolite reduced the acetic acid in the product.
文章引用：张志峰, 谭顺, 张志军. Ag/HZSM-5在线催化裂解木粉–聚丙烯复合材料研究[J]. 材料科学, 2018, 8(4): 382-394. https://doi.org/10.12677/MS.2018.84043

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