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EnglishPyrolysis of low-density polyethylene in an innovative batch pilot plant, with a hydraulic guard ensuring a safe process, was performed. The influence of process temperature on yield, distribution and composition of products was investigated. The oil/waxes were analyzed by gas chromatography coupled mass spectrometry, while pyrolysis gas was monitored online during the process by micro-gas chromatography. Pyrolysis were carried out at 450, 500, 550 and 600 °C. Results obtained show that low temperatures yield a greater amount of oil/waxes, and a gas enriched in carbon oxides and C3+ hydrocarbons. At higher temperatures, the gas fraction, riche in methane and hydrogen, is predominant over liquid products. This process has proved to be a versatile way to recover polyethylene wastes into valuable oils (rich in aliphatic and simple aromatic hydrocarbons) or gas, to be used as petrochemical feedstock or fuel, thus providing a sustainable method for material and energy recovery of waste packaging.
| Titolo: | Pyrolysis of low-density polyethylene | |
| Autore/i: | ZATTINI, GIORGIO; LEONARDI, CHIARA; MAZZOCCHETTI, LAURA; Cavazzoni, Massimo; MONTANARI, IVAN; Tosi, Cristian; Benelli, Tiziana; GIORGINI, LORIS | |
| Autore/i Unibo: | ||
| Anno: | 2017 | |
| Titolo del libro: | Smart Innovation, Systems and Technologies | |
| Pagina iniziale: | 480 | |
| Pagina finale: | 490 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1007/978-3-319-57078-5_46 | |
| Abstract: | Pyrolysis of low-density polyethylene in an innovative batch pilot plant, with a hydraulic guard ensuring a safe process, was performed. The influence of process temperature on yield, distribution and composition of products was investigated. The oil/waxes were analyzed by gas chromatography coupled mass spectrometry, while pyrolysis gas was monitored online during the process by micro-gas chromatography. Pyrolysis were carried out at 450, 500, 550 and 600 °C. Results obtained show that low temperatures yield a greater amount of oil/waxes, and a gas enriched in carbon oxides and C3+ hydrocarbons. At higher temperatures, the gas fraction, riche in methane and hydrogen, is predominant over liquid products. This process has proved to be a versatile way to recover polyethylene wastes into valuable oils (rich in aliphatic and simple aromatic hydrocarbons) or gas, to be used as petrochemical feedstock or fuel, thus providing a sustainable method for material and energy recovery of waste packaging. | |
| Data stato definitivo: | 25-feb-2020 | |
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