Mechanism and kinetics in catalytic hydrocracking of polystyrene in solution
| Autor: | Edwin G. Fuentes-Ordóñez, Juan R. González-Velasco, Joseba A. Salbidegoitia, M.P. González-Marcos |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Kinetics 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Cracking Polymer degradation chemistry Chemical engineering Mechanics of Materials Polymer chemistry Materials Chemistry Degradation (geology) Polystyrene 0210 nano-technology Bifunctional |
| Zdroj: | Polymer Degradation and Stability. 124:51-59 |
| ISSN: | 0141-3910 |
| DOI: | 10.1016/j.polymdegradstab.2015.12.009 |
| Popis: | A mechanism for polystyrene hydrocracking on a bifunctional Pt/H-Beta catalyst has been proposed. The mechanism consists of three steps for polymer degradation: initiation, propagation and termination, and an additional step for transformation of aromatics, direct product of polystyrene degradation, into other hydrocarbons. The most important reactions in the last step are hydrogenation–dehydrogenation and ring opening reactions, to produce naphthenics, paraffins and isoparaffins, with higher added value as fuels. Finally, degradation of polystyrene by catalytic hydrocracking has been described by means of continuous distribution kinetics, which allows for modelling of the evolution of polymer molecular size and conversion with reaction time, and estimation of kinetic parameters associated to catalyst characteristics when working in the kinetic regime. |
| Databáze: | OpenAIRE |
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