Equilibrium Sorption of Propane and 1-Hexene in Polyethylene: Experiments and Perturbed-Chain Statistical Associating Fluid Theory Simulations
| Autor: | Josef Chmelař, Juraj Kosek, Kateřina Haškovcová, Martina Podivinská |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
General Chemical Engineering Comonomer Thermodynamics Sorption 02 engineering and technology General Chemistry Polyethylene 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Diluent Industrial and Manufacturing Engineering 0104 chemical sciences 1-Hexene chemistry.chemical_compound chemistry Polymerization Propane Polymer chemistry Gravimetric analysis 0210 nano-technology |
| Zdroj: | Industrial & Engineering Chemistry Research. 56:6820-6826 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.7b00572 |
| Popis: | The availability of sorption equilibrium data is important for the design and optimization of polymerization processes. In this work, we used a gravimetric apparatus based on a magnetic suspension balance and the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state to study the equilibrium sorption of propane and 1-hexene in polyethylene (PE). Propane is used as a diluent in the gas-phase catalytic polymerization of ethylene, while 1-hexene is a commonly used comonomer. Experiments were carried out at industrially relevant conditions using a large set of PE samples with densities from 902 to 967 kg m–3. The solubilities were rigorously evaluated using temperature-dependent crystallinities, and swelling corrections were considered. The solubilities of both penetrants increased with decreasing temperature and decreasing PE crystallinity. Additionally, the PC-SAFT binary interaction parameters did not depend on the temperature. Such dependencies are predicted by theory but are onl... |
| Databáze: | OpenAIRE |
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