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首页> 外文期刊>Journal of Hazardous Materials >Pyrolysis of poly(vinyl chloride) and-electric arc furnacedust mixtures
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Pyrolysis of poly(vinyl chloride) and-electric arc furnacedust mixtures

机译：聚氯乙烯和电弧炉粉尘混合物的热解

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An investigation into the pyrolysis kinetics of PVC mixed with electric arc furnace dust (EAFD) was performed. Mixtures of both materials with varying PVC ratios (1:1, 1:2, 1:3) were prepared and pyrolyzed in a nitrogen atmosphere under dynamic heating conditions at different heating rates (5, 10, 30 and 50 degrees C/min). The pyrolysis process proceeded through two main decomposition steps; the first step involved the release of HCl which reacted with the metal oxides present in the dust, subsequently forming metal chlorides and water vapor. Benzene was also found to release as detected by TGA-MS. The remaining hydrocarbons in the polymer backbone decomposed further in the second step releasing further volatile hydrocarbons. Different models were used to fit the kinetic data namely the integral, the Van Krevelen, and Coats and Red fern methods. The presence of EAFD during PVC decomposition resulted in a considerable decrease in the activation energy of the reaction occurring during the first decomposition region. Furthermore, iron oxides were retained in the pyrolysis residue, whilst other valuable metals, including Zn and Pb, were converted to chlorides that are recoverable by leaching in water. It is believed that EAFD can be utilized as an active catalyst to produce energy gases such as propyneas evident from the TGA-MS. (C) 2015 Elsevier B.V. All rights reserved.
机译：对掺有电弧炉粉尘（EAFD）的PVC的热解动力学进行了研究。制备了两种具有不同PVC比（1：1、1：2、1：3）的材料的混合物，并在氮气气氛中在动态加热条件下以不同的加热速率（5、10、30和50摄氏度/分钟）热解。 。热解过程通过两个主要的分解步骤进行：第一步涉及释放HCl，该HCl与粉尘中的金属氧化物反应，随后形成金属氯化物和水蒸气。如通过TGA-MS检测到的，还发现苯释放。聚合物主链中的剩余烃在第二步中进一步分解，释放出更多的挥发性烃。使用了不同的模型来拟合动力学数据，即积分，Van Krevelen，Coats和Red Fern方法。 PVC分解过程中EAFD的存在导致在第一分解区域发生的反应的活化能大大降低。此外，氧化铁保留在热解残留物中，而其他有价值的金属（包括Zn和Pb）则转化为氯化物，可通过浸入水中回收。据信EAFD可以用作活性催化剂，以产生能量气体，例如从TGA-MS中可以看出的丙炔。 （C）2015 Elsevier B.V.保留所有权利。

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