Pyrolysis and co-pyrolysis of lignite and plastic
Pyrolysis and co-pyrolysis of lignite and plastic
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DOI：
10.1016/j.ijmst.2013.12.023
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发表时间：
2014
影响因子：
11.8
通讯作者：
Chunmei Qian;Min Zhou;Jian X. Wei;Puhai Ye;Xuliang Yang
中科院分区：
文献类型：
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作者：
Chunmei Qian;Min Zhou;Jian X. Wei;Puhai Ye;Xuliang Yang
该研究首先通过热重分析（TGA）讨论了热解特性和动力学，然后研究了管式炉中褐煤的热解以及与塑料（聚乙烯或聚丙烯）的共热解。同时，重点研究了不同混合比例下的共热解产物以及不同测试温度和升温速率下的热解产物。结果表明，较高的最终测试温度和较低的加热速率有助于褐煤热解中的键裂变，导致焦产物减少。共热解中，褐煤作为氢供体，随着混合物中塑料含量的增加，木炭和水的产率上升，而气体和焦油的产率下降；少量塑料的掺入会促进气体和焦油的产生。动力学研究表明，在530-600°C的温度范围内，褐煤的活化能高于褐煤/塑料共混物的活化能，并且随着塑料质量比从0%增加到10%，样品在共热解过程中分解所需的能量更少。
The study firstly discusses the pyrolysis characteristics and kinetics by thermogravimetric analysis (TGA), and then investigates the pyrolysis of lignite and co-pyrolysis with plastic (polyethylene or polypropylene) in tube furnace. Meanwhile, the research focuses on the co-pyrolysis products under different mixing ratios as well as pyrolysis products at different testing temperatures and heating rates. The results show that higher final testing temperature and lower heating rate contribute to bond fission in lignite pyrolysis, resulting in less char product. In co-pyrolysis, lignite acts as hydrogen donor, and the yields of char and water rise with increasing amount of plastic in the mixture, while the yields of gas and tar decrease; and a little admixture of plastic will promote the production of gas and tar. Kinetic studies indicate that in temperature range of 530–600 °C, activation energies of lignite are higher than those of lignite/plastic blends, and as plastic mass ratio increases from 0% to 10%, samples need less energy to be decomposed during co-pyrolysis.