Flash Pyrolysis of Oleic Acid as a Model Compound Adsorbed on Supported Nickel Catalysts for Biofuel Production
| العنوان: | Flash Pyrolysis of Oleic Acid as a Model Compound Adsorbed on Supported Nickel Catalysts for Biofuel Production |
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| المؤلفون: | Marilia R. Santos, C. M. B. M. Barbosa, Roger Fréty, Renan F. Sales, José Pacheco, Antonio O. S. Silva |
| المصدر: | Journal of the Brazilian Chemical Society v.25 n.12 2014 Journal of the Brazilian Chemical Society Sociedade Brasileira de Química (SBQ) instacron:SBQ Journal of the Brazilian Chemical Society, Volume: 25, Issue: 12, Pages: 2433-2443, Published: DEC 2014 |
| بيانات النشر: | Sociedade Brasileira de Quimica (SBQ), 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | inorganic chemicals, chemistry.chemical_classification, flash pyrolysis, Thermogravimetric analysis, Chemistry, Alkene, Inorganic chemistry, chemistry.chemical_element, General Chemistry, Catalysis, law.invention, Nickel, Oleic acid, chemistry.chemical_compound, oleic acid, law, biofuel, lipids (amino acids, peptides, and proteins), Calcination, nickel catalysts, Temperature-programmed reduction, Pyrolysis |
| الوصف: | Flash pyrolysis of oleic acid was studied over 10 wt.% nickel catalysts supported on silica and alumina. The catalysts were impregnated with 10 wt.% oleic acid. The dried precursors and the catalysts containing oleic acid were characterized by thermogravimetric analysis. The calcined catalysts were analyzed by X-ray diffraction (XRD) and temperature programmed reduction (TPR). Samples containing adsorbed oleic acid were submitted to flash pyrolysis up to 650 °C. Whereas pyrolysis of oleic acid without catalyst converted only about 10%, the pyrolysis of oleic acid adsorbed on catalysts allowed practically a complete conversion. NiO/alumina yielded a higher amount of liquid hydrocarbons than NiO/silica. The main products obtained with NiO/silica were 1-alkenes, whereas the main products obtained with NiO/alumina were alkene isomers and aromatics. Small amounts of oxygenated compounds were also observed, principally alcohols. The flash pyrolysis of oleic acid adsorbed on different catalyst surfaces appears as a useful way to distinguish activity trends of different catalyst samples. A pirólise rápida do ácido oleico foi estudada sobre catalisadores com 10% Ni suportados em sílica e alumina. Os catalisadores foram impregnados com 10% m/m de ácido oleico. Os precursores secos e os catalisadores contendo ácido oleico foram caracterizados por análise termogravimétrica. Os catalisadores calcinados foram analisados por difração de raios X (XRD) e redução à temperatura programada (TPR). As amostras com ácido oleico adsorvido foram submetidos à pirólise rápida a 650 °C. A pirólise de ácido oleico puro levou a 10% de conversão, enquanto a pirólise catalítica resultou em praticamente completa conversão. O catalisador NiO/alumina produziu mais hidrocarbonetos do que o NiO/sílica. Os principais produtos obtidos com NiO/sílica foram 1-alcenos, enquanto que os principais produtos obtidos com NiO/alumina foram isômeros de alcenos e aromáticos, e pequenas quantidades de compostos oxigenados, principalmente álcoois. A pirólise rápida de ácido oleico adsorvido em catalisadoras representa um método útil para distinguir as propriedades dos catalisadores e suas diferentes atividades. |
| وصف الملف: | text/html |
| تدمد: | 0103-5053 |
| DOI: | 10.5935/0103-5053.20140270 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::890dc4a2e8e6b5e52910757f628cc2dc https://doi.org/10.5935/0103-5053.20140270 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....890dc4a2e8e6b5e52910757f628cc2dc |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 01035053 |
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| DOI: | 10.5935/0103-5053.20140270 |