Aromatic fuel oils produced from the pyrolysis-catalysis of polyethylene plastic with metal-impregnated zeolite catalysts
Aromatic fuel oils produced from the pyrolysis-catalysis of polyethylene plastic with metal-impregnated zeolite catalysts
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DOI：
10.1016/j.joei.2017.10.009
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发表时间：
2019-02-01
影响因子：
5.7
通讯作者：
Williams, Paul T.
中科院分区：
文献类型：
--
作者：
Akubo, Kaltume;Nahil, Mohamad Anas;Williams, Paul T.
以高密度聚乙烯(HPDE)为原料，在固定床两段反应器中进行裂解-催化反应，生产改质芳烃裂解油。考察了负载1wt%和5wt%Ni、Fe、Mo、Ga、Ru和Co金属助剂的Y沸石催化剂对芳烃燃料组成的影响。在反应器系统的第一阶段，HDPE在600℃下进行热解，释放的热解气体被传递到第二阶段催化反应器，第二阶段催化反应器被预热到600℃。负载金属的Y型沸石催化剂导致产品油中芳香烃的生成量较高，生成的单环芳烃浓度较高。单环芳香族化合物主要由甲苯、乙苯和二甲苯组成，而2环烃类化合物主要是萘及其烷基化衍生物。菲和芘等多环芳香族化合物的产量减少。助剂金属的加入对芳烃油含量的影响不大，但提高了HDPE的氢产率。然而，对于1%的金属-Y沸石催化剂，在14-22wt%的范围内有明显的积炭，而在5wt%的金属-Y沸石催化剂上，积炭增加到18-26wt%。(C)2017年作者。爱思唯尔有限公司代表能源研究所出版。
Pyrolysis-catalysis of high density polyethylene (HPDE) was carried out in a fixed bed, two stage reactor for the production of upgraded aromatic pyrolysis oils. The catalysts investigated were Y-zeolite impregnated with transition metal promoters with 1 wt% and 5 wt% metal loading of Ni, Fe, Mo, Ga, Ru and Co to determine the influence on aromatic fuel composition. Pyrolysis of the HDPE took place at 600 degrees C in the first stage of the reactor system and the evolved pyrolysis gases were passed to the second stage catalytic reactor, which had been pre-heated to 600 degrees C. Loading of metals on the Y-zeolite catalyst led to a higher production of aromatic hydrocarbons in the product oil with greater concentration of single ring aromatic hydrocarbons produced. The single ring aromatic compounds consisted of mainly toluene, ethylbenzene and xylenes, while the 2-ring hydrocarbons were mainly naphthalene and their alkylated derivatives. There was a reduction in the production of multiple ring aromatic compounds such as, phenanthrene and pyrene. The addition of the promoter metals appeared to have only a small influence on aromatic oil content, but increased the hydrogen yield from the HDPE. However, there was significant carbon deposition on the catalysts in the range 14-22 wt% for the 1% metal-Y-zeolite catalysts and increased to 18-26 wt% for the 5 wt% metal-Y-zeolite catalysts. (C) 2017 The Authors. Published by Elsevier Ltd on behalf of Energy Institute.