Catalytic effect of Al-Zn composite catalyst on the degradation of PVC-containing polymer mixtures into pyrolysis oil

摘要

Thermal and catalytic degradation of poly(propylene)(PP)/poly(vinyl chloride)(PVC) at 380 degreesC, poly(ethylene)(PE)/PVC at 420 degreesC, and poly(styrene)(PS)/PVC at 360 degreesC into oil was carried out under atmospheric pressure by semibatch operation. The purpose of this study is to determine the boiling-point distribution of the products of the degradation of PVC mixed plastics and to remove chorine compounds from products with suitable sorbents. In the catalytic degradations, the Al-Zn composite catalyst was tested as both cracking and dechlorination catalyst. Compared to thermal degradation, the catalyst accelerated the degradation rate of polymers and lowered the boiling point of liquid products, and at the same time, it showed good effect on the fixation of evolved HCl and significantly decreased the chlorine content in the oil. (C) 2003 Elsevier Science Ltd. All rights reserved. [References: 14]