焦化蜡油对含聚氯乙烯混合塑料热裂解产物的影响

以含聚氯乙烯(PVC)的混合塑料和焦化蜡油为原料,在N_2流量3 mL·s~(-1)吹扫条件下进行分段热裂解,裂解温度(25～250)℃、(250～360)℃及(360～480)℃。考察油固比、PVC含量对产物组成的影响,检测裂解油的有机氯含量。结果表明,PVC含量为质量分数5%,焦化蜡油与混合塑料的油固质量比为2,FCC催化剂用量为质量分数10%时,燃料油收率达到92. 04%,气体和固体收率仅有6. 89%和1. 07%。添加焦化蜡油增加液相产物中的重组分,减少轻组分。以焦化蜡油为溶剂进行混合塑料的催化裂解的工艺不仅为"白色污染"的处理开辟了一条新途径,而且为获得较低氯含量塑料裂解油提供了工艺参考。

Effect of coker gas oil on the liquid pyrolysised from mixed plastics containing PVC

Fuel oil was obtained by catalytic cracking of mixed plastics containing PVC and coker gas oil with N₂ (3 mL·s^-1) purging at temperatures of (25~250) ℃,(250~360) ℃ and (360~480) ℃.The influence of the ratio of fuel to solid and the PVC amount on product composition was investigated in detail.The organic chlorine content of cracking oil was detected.The results indicated that when the PVC mass fraction was 5%,ratio of oil to solid was 2,FCC catalyst amount was 10%,the yield of fuel oil reached 92.04%,the yield of gas and the solid were only 1.07% and 6.89% respectively.The addition of coker gas oil had increased the heavy components and reduced the light components of the liquid phase products.Co-processing of mixed plastics and coker gas oil not only opens up a new way for handling “white pollution”,but also provides a technological reference for obtaining low chlorine content cracking oil of plastics.