رسالة جامعية
Improvement of oleaginous technological abilities through controlled restructuration : impacts on extraction and in situ transesterification processes ; Maîtrise de l'aptitude technologique des oléagineux par modification structurelle : applications aux opérations d'extraction et de transestérification in-situ
| العنوان: | Improvement of oleaginous technological abilities through controlled restructuration : impacts on extraction and in situ transesterification processes ; Maîtrise de l'aptitude technologique des oléagineux par modification structurelle : applications aux opérations d'extraction et de transestérification in-situ |
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| المؤلفون: | Nguyen Van, Cuong |
| المساهمون: | Laboratoire d'Étude des Phénomènes de Transfert et de l'Instantanéité : Agro-industrie et Bâtiment (LEPTIAB), La Rochelle Université (ULR), Université de La Rochelle, Karim Allaf |
| المصدر: | https://theses.hal.science/tel-00597795Test ; Autre. Université de La Rochelle, 2010. Français. ⟨NNT : 2010LAROS308⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2010 |
| المجموعة: | HAL - Université de La Rochelle |
| مصطلحات موضوعية: | Transesterification in-situ, Dic, Diffusivity, Accessibility, Rapeseed, Jatropha, Fatty acid methyl ester, Extraction, Diffusivité, Transestérification in-situ, Ester méthylique d’acide gras, Accessibilité, Colza, [SPI.OTHER]Engineering Sciences [physics]/Other |
| الوصف: | The present work has concerned the impact of Instant - Controlled Pressure Drop (DIC) texturing on both operations of oil extraction and in-situ transesterification, carried out with the rapeseed and the kernels of Jatropha Curcas. A fundamental analysis proved the importance of the reactive or solvent diffusion within the solid matrix. By texturing the natural product, the whole operation can be intensified. The process is revealed through three characteristics, which are the effective diffusivity, the starting accessibility, and the yields of extraction. Also, the kinetics and yield of fatty acid methyl ester of in-situ transesterification are discovered. A phenomenological study allowed determining the value of these characteristics versus DIC operating parameters (saturated steam pressure P and treatment time t).A 2 h solvent extraction of DIC treated material allowed the total oil yields to be improved by 153% for colza and 112% for jatropha, the effective diffusivity (Deff) can reach up to 8.014*10-12 m2/s as against 0.715*10-12 m2/s for colza untreated by DIC, and up to 5.90*10-12 m2/s as against 2.42*10-12 m2/s for the untreated jatropha. The rate of initial accessibility of products treated by DIC can reach up to 80.53% as against 26.71% for untreated colza and can reach up to 92.58% as against 75.91% for the product untreated jatropha. In the case of in situ transesterification, the total yield of fatty acid methyl esters (FAME total) obtained from the DIC treated products is systematically higher than that of untreated colza and jatropha raw material. The reaction time was decreased to 30 - 45 min instead of 120 min in the case of colza, and to 15 min instead of 60 min in the case of jatropha kernel. ; Le présent travail de thèse porte sur l’étude de l’impact de la texturation par DIC (Détente Instantanée Contrôlée) sur les deux opérations d’extraction d’huile et de transestérification in-situ appliquées aux graines de colza et fèves de Jatropha Curcas. Une analyse fondamentale a prouvé l’importance ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | French |
| العلاقة: | NNT: 2010LAROS308; tel-00597795; https://theses.hal.science/tel-00597795Test; https://theses.hal.science/tel-00597795/documentTest; https://theses.hal.science/tel-00597795/file/These-NguyenVanCuong.pdfTest |
| الإتاحة: | https://theses.hal.science/tel-00597795Test https://theses.hal.science/tel-00597795/documentTest https://theses.hal.science/tel-00597795/file/These-NguyenVanCuong.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.6E10C7F7 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |