رسالة جامعية
Optimization of DIC assisted hydrolytic conversion of polysaccharides (starch and cellulose) ; Optimisation de l'opération de conversion de polysaccharides (amidon et cellulose) par hydrolyse assistée par DIC
| العنوان: | Optimization of DIC assisted hydrolytic conversion of polysaccharides (starch and cellulose) ; Optimisation de l'opération de conversion de polysaccharides (amidon et cellulose) par hydrolyse assistée par DIC |
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| المؤلفون: | Sarip, Harun |
| المساهمون: | Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356 (LaSIE), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS), Université de La Rochelle, Université de Kuala Lumpur (Malaisie), Karim Allaf, Mohamad Azemi Mohamad Noor |
| المصدر: | https://theses.hal.science/tel-00986304Test ; Other. Université de La Rochelle; Université de Kuala Lumpur (Malaisie), 2012. English. ⟨NNT : 2012LAROS373⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2012 |
| المجموعة: | HAL - Université de La Rochelle |
| مصطلحات موضوعية: | Degradation, Glucose conversion, Kinetics, Sago, Acid hydrolysis, DIC, Crude starch, Hydrolyse acide, Conversion glucosique, Dégradation, Amidon brut, Cinetique, Sagoutier, [CHIM.OTHE]Chemical Sciences/Other |
| الوصف: | Present state of art related to biomass conversion technology so far was found to concentrate on an enzymatic process, coupled with thermal pretreatment on biomass rich in cellulose. Biomass that rich in crude starch is also important in terms of strategic and economic point of view. The main objective of this study is to adopt a new strategy for a single step conversion of a crude starch material into oligosaccharide and glucose utilizing DIC technology. In contrast to existing thermal based pretreatment, DIC technology involves two vacuum cycles; first vacuum cycle was to increase steam accessibility on biomass and to reduce generation of steam condensate thus avoid losing of monosaccharide and hemicelluloses, while second vacuum cycle was to reduce potential thermal degradation of glucose. Distributions of products formed were found to be closely associated with severity of treatment on crude starch material. At lower DIC severity, pretreatment favors the formations of high oligosaccharide composition with small fraction of glucose; while at high DIC severity, pretreatment favors formation of high glucose as a major end product. During an exploratory study to establish the relevant reaction factors; vacuum cycle and moisture content were the two main factors influencing the conversion of crude starch into glucose.DIC starch conversion into glucose was found to be moisture dependent. Both factors were combined together to optimize the other three factors: pressure/temperature, treatment times, and acid concentration. High DIC severity treatment alone could convert nearly 50% of crude starch into glucose. During DIC optimization, an experimental design was developed and tested with DIC pretreatment in order to obtain a second order polynomial mathematical model that was then applied for response surface methodology (RSM). The interaction nature of above factors was examined and was found they depend on DIC treatment severity. Two experimental designs with low and high DIC severity were developed; Low DIC ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | English |
| العلاقة: | NNT: 2012LAROS373; tel-00986304; https://theses.hal.science/tel-00986304Test; https://theses.hal.science/tel-00986304/documentTest; https://theses.hal.science/tel-00986304/file/2012SARIP31307.pdfTest |
| الإتاحة: | https://theses.hal.science/tel-00986304Test https://theses.hal.science/tel-00986304/documentTest https://theses.hal.science/tel-00986304/file/2012SARIP31307.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.DDDE89D4 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |