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Experimental study of pyrolysis and combustion of scrap tire

机译：废轮胎热解燃烧实验研究

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Pyrolysis and combustion behaviors of a single rubber particle in a derivative thermogravimetric (DTG) apparatus were investigated. The influence of temperature (400-850 degrees C) and oxygen content in gas (5-21%) on combustion behavior of rubber samples and solid products of the pyrolysis process (chars) was studied. Development of the porosity and specific surface area of the rubber particle during pyrolysis was investigated. Pyrolysis of scrap rubber samples was carried out under nitrogen atmosphere over a temperature range 20-850 degrees C using a heating rate of 5 degrees C/min. The measured DTG curves show two different weight loss regions during the pyrolysis over a temperature range 250-550 degrees C. In all, 52-55% of the samples weight was lost during the pyrolysis process and another 30% during the combustion of char. Ashes create approximately 17% of the samples weight. The ignition temperature of scrap rubber samples in air was around 512 degrees C and increased with decreasing oxygen content. The reaction time of the combustion process decreased about 1.4 times with increasing temperature from 500 to 750 degrees C and 5.5 times with decreasing oxygen content in the inlet gas from 21 to 5 mol%. The total specific surface area of the rubber sample with the degree of pyrolysis increased rapidly to 83 m(2)/g. The values of total porosity increased significantly from 0.3 to 32% at the end of pyrolysis. Copyright (C) 2006 John Wiley & Sons, Ltd.
机译：研究了单个橡胶颗粒在衍生热重（DTG）装置中的热解和燃烧行为。研究了温度（400-850摄氏度）和气体中的氧气含量（5-21％）对橡胶样品和热解过程（炭）的固体产物的燃烧行为的影响。研究了热解过程中橡胶颗粒的孔隙率和比表面积的变化。废橡胶样品的热解是在氮气气氛下，在20-850摄氏度的温度范围内，以5摄氏度/分钟的加热速率进行的。测得的DTG曲线显示了在250-550摄氏度的温度范围内热解过程中的两个不同的失重区域。总共，在热解过程中损失了52-55％的样品重量，而在焦炭燃烧过程中损失了另外30％的重量。灰烬约占样品重量的17％。废橡胶样品在空气中的着火温度约为512摄氏度，并且随着氧气含量的降低而升高。燃烧过程的反应时间随着温度从500摄氏度增加到750摄氏度而减少了约1.4倍，随着进气中氧气含量从21摩尔％减少到5摩尔％减少了5.5倍。橡胶样品的总比表面积随热解度迅速增加至83 m（2）/ g。在热解结束时，总孔隙率值从0.3％显着增加到32％。版权所有（C）2006 John Wiley＆Sons，Ltd.

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