废旧轮胎催化热解油品分析

Analysis of oil from waste tyre pyrolysis

采用ZSM-5和超稳Y(USY)分子筛催化剂,利用两段法固定床研究废旧轮胎的催化热解。通过对轮胎的催化热解后的轻质油品(<160℃)分析,发现热解后油品中单环芳香烃含量增加。如在热解温度500℃、催化温度400℃和催化剂与轮胎比例0.5的情况下,对没有催化剂以及含ZSM-5催化剂及USY催化剂的轮胎热解,得到的轻质馏分中苯的含量分别是0.15%、0.99%和1.89%,甲苯的含量分别是3.04%、5.68%和17.70%。这对从废旧轮胎热解油中提取化学化工物质的工艺研究有着重要的指导意义。

Two zeolite catalysts, ZSM-5 and ultrastable Y-type （USY）, were used in a two-staged fixed bed reactor to pyrolyze waste tyre. According to the analysis of the composition of the light oil （boiling point〈160℃） from the pyrolysis/catalytic cracking of waste tyre, the concentrations of single ring aromatics were increased. For example, while the pyrolysis temperature, catalytic cracking temperature and catalyst/tyre ratio were 500℃, 400℃ and 0.5, respectively, the concentration of benzene was 0.15% for the pyrolysis oil, 0.99% for the ZSM-5 catalytic cracking oil and 1.89% for the USY catalytic cracking oil. And under this condition, the concentration of toluene was 3.04% for the pyrolysis oil, 5.68% for the ZSM-5 catalytic cracking oil and 17.70% for the USY catalytic cracking oil, respectively. This result is important for the process of extracting chemical materials from the pyrolysis of waste tyre.