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首页> 外文期刊>Applied Surface Science >Effect of combined activation on the preparation of high porous active carbons from granulated post-consumer polyethyleneterephthalate
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Effect of combined activation on the preparation of high porous active carbons from granulated post-consumer polyethyleneterephthalate

机译：联合活化对颗粒状消费后聚对苯二甲酸乙二醇酯制备高多孔活性炭的影响

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Activated carbons were prepared from granulated post-consumer PET by combined activation including heat treatment with sulphuric acid (chemical activation) followed by steam activation. The effect of activation time, temperature, impregnation coefficient in the activation process was studied in order to optimize those reception parameters. One of the most important parameter in combined activation of crushed PET was found to be impregnation coefficient. It was defined that the optimal impregnation coefficient is equal 28%. Activation temperature is another variability which has a significant effect on the pore volume evolution. The increasing of activation temperature enhances the surface area and pore volumes of active carbons. The yield of final product which composes of nearly 15% is the factor limited the activation temperature above 800 degrees C. Textural characteristics of the samples were carried out by performing NZ adsorption isotherm at -196 C. The obtained active carbons were mainly micro-and mesoporous and with BET apparent surface areas of up to 1030 m(2)/g. The adsorption capacity on methylene blue reaches 1.0 mmol/g, the sorption activity on iodine comes to 77%. (c) 2005 Elsevier B.V. All rights reserved.
机译：活性炭是由粒状的消费性PET制成的，其组合活化包括硫酸热处理（化学活化），然后进行蒸汽活化。研究了活化时间，温度，浸渍系数在活化过程中的影响，以优化这些接收参数。发现在压碎PET的联合活化中最重要的参数之一是浸渍系数。定义最佳浸渍系数等于28％。活化温度是另一种变化，其对孔体积的演变具有显着影响。活化温度的增加增加了活性炭的表面积和孔体积。最终产物的收率接近15％，是限制活化温度超过800摄氏度的因素。样品的织构特性是通过在-196℃下进行NZ吸附等温线进行的。所获得的活性炭主要是微量的和介孔和BET表观表面积最高达1030 m（2）/ g。在亚甲基蓝上的吸附容量达到1.0 mmol / g，对碘的吸附活性达到77％。 （c）2005 Elsevier B.V.保留所有权利。

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