New chemical recycling methodologies: Hydrous pyrolysis to recover monomers from polyolefins
| Autor: | Antonella Castelli, Pier Luigi Beltrame, Laura Bergamasco, Guido Audisio, Fabio Bertini |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Organic Chemistry Polymer Condensed Matter Physics Styrene chemistry.chemical_compound Monomer chemistry Chemical engineering Materials Chemistry Organic chemistry Hydrous pyrolysis Polystyrene Pyrolytic carbon Inert gas Pyrolysis |
| Zdroj: | Die Makromolekulare Chemie. Macromolecular symposia 135 (1998): 175–182. doi:10.1002/masy.19981350120 info:cnr-pdr/source/autori:G. Audisio, F. Bertini, P.L. Beltrame, L. Bergamasco, A. Castelli/titolo:New chemical recycling methodologies: hydrous pyrolysis to recover monomer from polyolefins/doi:10.1002%2Fmasy.19981350120/rivista:Die Makromolekulare Chemie. Macromolecular symposia/anno:1998/pagina_da:175/pagina_a:182/intervallo_pagine:175–182/volume:135 Scopus-Elsevier |
| ISSN: | 1022-1360 |
| DOI: | 10.1002/masy.19981350120 |
| Popis: | Thermal degradation of polystyrene has been investigated in the presence of water under subcritical conditions (hydrous pyrolysis). The experiments were carried out in closed systems under inert atmosphere, in the temperature range 300-350 °C, at pressures up to 180 atm, for 1-120 h. The results showed that the presence of water increases the yields of volatile products, mainly in the first steps of the pyrolytic process, with a high selectivity in the monomer. In order to improve the phase contact between water and polymer during the pyrolysis, some runs have been carried out on silica-supported polystyrene and using a stirred reactor. Under these conditions, the above effects appeared to be greatly enhanced. The best recovery of styrene, close to 71 %, has been achieved at 320 °C and 8 h. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text