Experimental study of co-pyrolysis of polyethylene/sawdust mixtures
Experimental study of co-pyrolysis of polyethylene/sawdust mixtures
复制标题
DOI：
10.2298/tsci0402065b
复制
发表时间：
2004
期刊：
影响因子：
1.7
通讯作者：
C. Berrueco;J. Ceamanos;E. Esperanza;F. J. Mastral
中科院分区：
文献类型：
--
作者：
C. Berrueco;J. Ceamanos;E. Esperanza;F. J. Mastral
研究生物质和热塑性塑料混合物（如聚乙烯）的热分解行为，对工业和城市废物的热回收过程（如热解或气化）很有意义。纯聚乙烯热降解过程中不形成固体残留物。然而，添加生物质（生成木炭）可以改变产品分布并提高所获得气体的热值。在流化床反应器中对松木屑、聚乙烯及聚乙烯与松木屑混合物的热降解进行了研究。实验在五种不同的温度下进行：640、685、730、780和850℃。测定了所得油、蜡、气的产率和组成。在不同的测试温度下，聚乙烯的加入增加了气体产量，减少了蜡和液体的产量。低温共热解产生的主要气体为一氧化碳乙烯、二氧化碳、丙烯、丁二烯、甲烷和戊二烯，高温共热解产生的气体成分变化较大，主要成分为一氧化碳（大于33 wt.%）、乙烯、甲烷苯和氢气。对液体馏分的分析表明，含氧化合物和脂肪化合物的浓度降低。
A study of the behavior of the thermal decomposition of mixtures of biomass and thermoplastics, such as polyethylene, is of interest for processes for the thermal recovery of industrial and urban wastes such as pyrolysis or gasification. No solid residue is formed during the thermal degradation of pure polyethylene. However, the addition of biomass, which generates char can vary the product distribution and increase the heating value of the gas obtained. A study of the thermal degradation of pine sawdust, polyethylene and mixtures of polyethylene and pine sawdust has been carried out in a fluidized bed reactor. Experiments were carried out at five different temperatures: 640, 685, 730, 780, and 850 oC. The yields and composition of the derived oil, wax, and gas were determined. The addition of polyethylene increases the gas production and decreases the production of waxes and liquids for the different temperatures tested. The main gases produced from the co-pyrolysis process were, at low temperatures, carbon monoxide ethylene, carbon dioxide, propylene, butadiene, methane and pentadiene while at high temperatures the gas composition changed drastically, the main components being carbon monoxide (more than 33 wt.%), ethylene, methane benzene and hydrogen. The analysis of the liquid fraction shows a decrease of the concentration of oxygenated and aliphatic compounds.