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以聚丙烯为试验物料,利用N2热等离子体在等离子体反应器内进行了一系列热解试验,重点考察了气体产物成分及含量。在反应过程中加入过热水蒸气以改善气体品质,在本实验条件下,气体产物中CO与H2之和可以达到40%,C2H2可达到5%。  相似文献
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Disposal of the huge piles of used tires is increasingly becoming a problem all over the world. Incineration may utilize the energy content of waste tires, but it is associated with the generation of SO2, NOx and other hazardous emissions. Pyrolysis is an alternative disposal method with the possibility for recovery of valuable products from used tires. Recently, waste processing technology based on plasma processes has received much attention due to a number of advantages such as high treatment rate, small space volume, etc. In this paper, the pyrolysis of waste tire using a capacitively coupled radio-frequency (RF) plasma reactor was investigated. The lab-scale RF plasma reactor was operated with RF powers between 1 600 W and 2 000 W, pressures between 3 000 Pa and 8 000 Pa ( absolute pressure) and temperatures between 1 200 K and 1 800 K. In the tire powder pyrolysis experiments, two product streams are obtained: combustible gas and char. The physical properties (surface area, porosity, particle morphology) as well as chemical properties (elemental composition, heating value and surface functional groups) of char were examined to exploit the potential applications of the char. The results indicate that the RF plasma pyrolysis would be a useful technology for waste disposal.  相似文献
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