Fixed-bed fire-tube heating pyrolysis of solid tire wastes available in Bangladesh for the production of liquid fuels and chemicals
Fixed-bed fire-tube heating pyrolysis of solid tire wastes available in Bangladesh for the production of liquid fuels and chemicals
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孟加拉国可利用固定床火管加热热解固体轮胎废料来生产液体燃料和化学品
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发表时间：
2008
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通讯作者：
M. Islam
中科院分区：
文献类型：
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作者：
M. Islam
本研究考虑了在孟加拉国以及世界各地丰富的自行车/黄包车，摩托车，乘用车和卡车轮胎废弃物通过固定床火管加热热解技术转化为液体燃料和化学品。通过近似和终极分析、总热值和热重分析对固体轮胎废弃物进行了表征，以探讨其作为该考虑的原料的适用性。在30-800℃的温度范围内，在10和60℃/min的加热速率下，用热重法研究了所选轮胎废料在氮气气氛下的热解动力学。在两种加热速率下，卡车轮胎的重量损失百分比较高，自行车/人力车轮胎的重量损失百分比较低。用一个简化方程对轮胎废料的总速率方程进行了满意的建模，并以此方程确定了基于阿伦尼乌斯形式的未反应物质的动力学参数。发现预测的速率方程与TG和DTG的实测数据拟合得很好。所有样品的差热分析曲线表明，降解反应主要是三个放热反应和一个吸热反应。在固定床火管加热反应器的冷模型上进行了两种流体动力学实验：一种是利用空压机和人工固体炭来确定炭的喷射压力，另一种是通过LDV测量和流动可视化试验来确定固体炭喷射过程中反应器腔内的流态。为了从反应器中完全去除焦炭产物，喷射压力应足以产生比焦炭重量高9%的向上力。螺旋形煤焦出口在煤焦喷射过程中无法在反应器内启动旋转流动。在固定床火管加热反应器中对四种轮胎废弃物在不同热解条件下进行热解，确定最终固定床火管加热热解孟加拉国固体轮胎废弃物用于生产液体燃料和化学品的作用
The conversion of bicycle/rickshaw, motorcycle, passenger car and truck tire wastes, which are found in abundance in Bangladesh as well as all over the world, into liquid fuels and chemicals by fixed-bed firetube heating pyrolysis technology has been taken into consideration in this study. The solid tire wastes were characterized through proximate and ultimate analysis, gross calorific values and thermogravimetric analysis to investigate their suitability as feedstock for this consideration. Pyrolysis kinetics of the selected tire wastes have been investigated thermogravimetrically under nitrogen atmosphere at heating rates of 10 and 60°C/min over a temperature range of 30-800°C. The percentage weight loss was higher for truck tire and was lower for bicycle/rickshaw tire for both heating rates. An overall rate equation for the tire wastes has been modeled satisfactorily by one simplified equation from which the kinetic parameters of unreacted materials based on Arrhenius form can be determined. The predicted rate equation was found to fit the measured TG and DTG data fairly well. DTA curves for all of the samples show that the degradation reactions are three main exotherms and one endotherm. Two types of fluid dynamics experiments were carried out on a cold model of the f ixed-bed f ire-tube heating reactor: f irst to determine the char ejection pressure, which was conducted with the aid of an air compressor and artificial solid char while second to determine flow pattern in the reactor chamber during the ejection of solid char that was conducted by LDV measurement and flow visualization test. For complete removal of char product from the reactor, the ejection pressure should be sufficient enough to create 9% higher upward force than the weight of the char. The spiral shaped char exit port was unable to initiate a rotational flow inside the reactor during ejection of char. Four types of tire wastes were pyrolysed in the fixed-bed fire-tube heating reactor under different pyrolysis conditions to determine the role of f inal Fixed-bed Fire-tube Heating Pyrolysis of Solid Tire Wastes Available in Bangladesh for the Production of Liquid Fuels and Chemicals