Petrochemical feedstock by thermal cracking of plastic waste |
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| Affiliation: | 1. Department of Civil, Environmental, Land, Building Engineering and Chemistry, Politecnico di Bari, Via E. Orabona, 4, I-70125, Bari, Italy;2. Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, SA, Italy;3. Department of Engineering, University of Palermo, Viale delle Scienze, 90128, Palermo, Italy;4. INSTM, Via Giusti, 9 50125, Firenze, Italy;5. Institute of Polymers, Composites and Biomaterials (IPCB), National Research Council of Italy (CNR), P.le E. Fermi, 1, I-80055, Portici (Napoli), Italy;1. Department of Chemical Engineering Material & Environment, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy;2. CERENA, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;1. Laboratory for Chemical Technology (LCT), Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering & Architecture, Ghent University, Technologiepark 125, 9052 Zwijnaarde, Belgium;2. School of Chemical Engineering, National Technical University of Athens, Iroon Polytechniou 9, 15780 Athens, Greece;1. Graduate School of Energy and Environmental System Engineering, 163 Siripdaero, Dongdaemun-Gu, Seoul 02504, Republic of Korea;2. Graduate School of Environmental Engineering, University of Seoul, 163 Siripdaero, Dongdaemun-Gu, Seoul 02504, Republic of Korea |
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| Abstract: | The thermal cracking is one of the possible ways to obtain petrochemical feedstock from polymer wastes. The properties of the cracking products depend mainly on the type of the raw material. In this study the degradation of different mixtures of polymer wastes (polypropylene and polystyrene) were investigated in a horizontal tube reactor. Temperature of 510–520 °C and residence time of 15–30 min were used. The effects of the concentration of polystyrene on the yields and structure of products were also studied. Moreover, the interaction between the polymers during the pyrolysis was investigated. The products of the thermal cracking were analyzed by gas-chromatography, infrared spectroscopy and different standardized and non-standardized methods.It was found, that the concentration of polystyrene significantly affected both the quantity and quality of degradation products. It was also observed that the presence of the polystyrene in the raw material increased the reaction rate coefficient, and enhanced the degradation rate of polypropylene. By higher concentration of polystyrene in raw materials, the yield of light products considerably increased, furthermore, in the naphtha-like fraction the concentration of aromatics also increased. The characteristics of the products were changed with the polystyrene content in the raw materials. The liquid products had advantageous properties for further utilization as fuel like or petrochemical feedstock applications. |
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