Department of Chemical Engineering, University of the Basque Country UPV/EHU, PO Box 644, 48080 Bilbao, Spain.
Department of Chemical Engineering, University of the Basque Country UPV/EHU, PO Box 644, 48080 Bilbao, Spain.
Waste Manag. 2020 Mar 15;105:18-26. doi: 10.1016/j.wasman.2020.01.026. Epub 2020 Jan 31.
The co-feeding of scrap tires pyrolysis oil (STPO) on the catalytic cracking of vacuum gasoil (VGO) has been investigated with the aim of exploring the capacity of the refinery fluid catalytic cracking (FCC) unit to upgrade discarded tires at large-scale. The runs have been carried out in a CREC (Chemical Reactor Engineering Centre) riser simulator reactor that mimics the behavior of the industrial unit at the following conditions: 500-560 °C; catalyst/oil ratio, 3-7 g g; contact time, 6 s. Obtained results with the blend of 20 wt% STPO in VGO have been compared with those obtained in the cracking of the pure streams, i.e., STPO and VGO, to get a proper idea of the synergetic effects that could be involved in the co-feeding. This way, when the STPO is co-fed with the VGO the production of naphtha (C-C) and light cycle oil (C-C) lumps are maximized, as the over-cracking reactions that convert them into gaseous products (C-C) are mitigated. Consequently, the co-feeding promotes the production of high-interest hydrocarbons for refineries. Additionally, the naphtha obtained in the cracking of the blend shows a lower content of paraffins and naphthenes than that obtained with the VGO, and higher of olefins and aromatics.
废轮胎热解油（STPO）与减压瓦斯油（VGO）共进料催化裂化的研究旨在探索炼油厂流化催化裂化（FCC）装置大规模升级废弃轮胎的能力。这些运行是在 CREC（化学反应器工程中心）提升管模拟器反应器中进行的，该反应器模拟了工业装置在以下条件下的行为：500-560°C；催化剂/油比，3-7 g g；接触时间，6 s。将 20 wt% STPO 与 VGO 的混合物的结果与 STPO 和 VGO 的纯物流裂化的结果进行了比较，以了解共进料中可能涉及的协同作用。通过这种方式，当 STPO 与 VGO 共进料时，石脑油（C-C）和轻循环油（C-C）馏分的产量最大化，因为将其转化为气态产物（C-C）的过度裂化反应得到缓解。因此，共进料促进了炼油厂高附加值烃类的生产。此外，与 VGO 相比，在共进料的混合物裂化中获得的石脑油中的烷烃和环烷烃含量较低，而烯烃和芳烃含量较高。
