| 초록 |
The performance of acid-treated halloysite clays in the catalytic degradation of polystyrene(PS) was investigated in this study. The composition of degradation products, especially liquid fractions resulted over studied catalysts, was compared to understand the role of catalysts. The degradation was carried out in a semi-batch reactor with a mixture of polystyrene and catalysts at 400℃. The acid-treated halloysite clays showed good catalytic activity for the degradation of PS with very high selectivity to aromatic liquids. The effects of catalyst acidity, reaction temperature and contact time on the distribution of aromatics are discussed. With the increase of HCl concentration up to 3N, ppre volume and specific surface area of the acid-treated halloysite increased. The increase of temperature favored the selectivity to styrene monomer and its dimers. However, the increase of contact time and surface acidity enhanced the production of ethylbenzene.
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