Influence of pressure (100 Pa–100 Mpa) on the pyrolysis of an alkane at moderate temperature (603 K–723 K): Experiments and kinetic modeling
| Autor: | Raymond Michels, F. Lannuzel, G. Scacchi, Roda Bounaceur, V. Burklé-Vitzthum, Paul-Marie Marquaire |
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| Přispěvatelé: | Laboratoire Réactions et Génie des Procédés (LRGP), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), GeoRessources, Institut national des sciences de l'Univers (INSU - CNRS)-Centre de recherches sur la géologie des matières premières minérales et énergétiques (CREGU)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2016 |
| Předmět: |
Alkane
chemistry.chemical_classification 010405 organic chemistry Thermodynamics 02 engineering and technology 021001 nanoscience & nanotechnology Kinetic energy 01 natural sciences 7. Clean energy Product distribution Moderate temperature 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound [CHIM.GENI]Chemical Sciences/Chemical engineering Fuel Technology chemistry Total pressure 0210 nano-technology Inert gas Pyrolysis ComputingMilieux_MISCELLANEOUS Octane |
| Zdroj: | Journal of Analytical and Applied Pyrolysis Journal of Analytical and Applied Pyrolysis, Elsevier, 2016, 122, pp.442-451. ⟨10.1016/j.jaap.2016.10.022⟩ |
| ISSN: | 0165-2370 1873-250X |
| Popis: | Confined pyrolysis of n- octane was performed in a closed, constant-pressure gold reactor at pressure ranging 1 MPa–70 MPa, temperature between 603 K and 723 K and residence times from 1 h to 1 month. The main products of reaction are n- alkanes of molecular weight lower than n- octane and branched alkanes of molecular weight higher than n- octane. Alkenes are minor products. At moderate temperature (603 K–623 K) the conversion of n- octane increases with pressure up to a maximum and then decreases (at constant duration of pyrolysis). For higher temperature (723 K) the conversion increases continuously with increasing pressure. A mechanism consisting of 182 free-radical reactions is set up and used to model these experimental results (1–70 MPa) as well as those obtained in a previous study at very low concentration (100 Pa diluted in inert gas, total pressure 0.15 MPa). The agreement between the experimental data and simulation results is satisfactory in terms of product distribution and conversion of n- octane in a wide range of pressure (100 Pa to 70 MPa). Some mechanistic explanations concerning the effect of pressure are proposed. |
| Databáze: | OpenAIRE |
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