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首页> 外文期刊>Journal of industrial and engineering chemistry >Catalytic activity of metal impregnated catalysts for degradation of waste polystyrene
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Catalytic activity of metal impregnated catalysts for degradation of waste polystyrene

机译：金属浸渍催化剂对废聚苯乙烯降解的催化活性

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摘要

Waste disposal by degradation to selective and desirable products is the major challenge of our modern society. The current study presents cheap, easily achievable, and novel impregnated catalysts on alumina (Al2O3) support for the degradation of waste polystyrene (WPS) into value added products like toluene, ethylbenzene, styrene monomer, and dimer etc. Al2O3 impregnated catalysts were characterized by SEM, XRD, and N2 adsorption/desorption and their catalytic activities were investigated in the degradation of WPS. The WPS degradation experiments were carried out in a batch reactor at 450 °C. The yield of liquid and styrene monomer was creased with metal impregnated catalysts as compared to nonimpregnated alumina and thermal degradation. Higher yield of liquid and styrene monomer was obtained with 20% Zn-Al2O3 catalyst, 91.54 and 62.88 wt.%, respectively. Impregnation substantially changed the acidity and catalytic properties of alumina in WPS degradation and carbanion may lead to high yield of styrene monomer. The impregnated catalysts performance in terms of high yield of styrene monomer is Zn-Al2O3 > C.U-Al2O3 > Mg-Al2O3 = Al-Al2O3 > Fe-Al2O3 > Al2O3 > thermal.
机译：通过降解为选择性和理想产品的废物处置是我们现代社会的主要挑战。当前的研究提出了廉价，易于实现的新型氧化铝浸渍催化剂，可将废弃的聚苯乙烯（WPS）降解为增值产品，如甲苯，乙苯，苯乙烯单体和二聚体等。Al2O3浸渍催化剂的特点是研究了SEM，XRD和N2吸附/解吸及其催化活性对WPS降解的影响。 WPS降解实验是在450°C的间歇反应器中进行的。与未浸渍的氧化铝和热降解相比，用金属浸渍的催化剂提高了液体和苯乙烯单体的产率。用20％的Zn-Al2O3催化剂（分别为91.54和62.88 wt。％）可获得较高的液体和苯乙烯单体收率。浸渍大大改变了WPS降解中氧化铝的酸度和催化性能，碳负离子可能导致苯乙烯单体的高收率。就苯乙烯单体的高产率而言，浸渍的催化剂性能为Zn-Al 2 O 3＞ C.U-Al 2 O 3＞ Mg-Al 2 O 3 ＝ Al-Al 2 O 3＞ Fe-Al 2 O 3＞ Al 2 O 3＞热。

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