دورية أكاديمية
Heterogeneous catalytic conversion of biomass-derived carbohydrates to furanic biofuel additives and chemicals
| العنوان: | Heterogeneous catalytic conversion of biomass-derived carbohydrates to furanic biofuel additives and chemicals |
|---|---|
| المؤلفون: | Elsayed, Islam |
| المصدر: | Theses and Dissertations |
| بيانات النشر: | Scholars Junction |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 5-Bis(hydroxymethyl)furan, 5-Bix(alkoxymethyl)furans, 5-Hydroxymethylfurfural, Biofuel, Catalytic transfer hydrogenation, Meerwein-Ponndorf-Verley |
| الوقت: | 2 |
| الوصف: | Increasing energy demand and various problems associated with fossil fuels such as environmental pollution, global warming and diminishing petroleum reserves have greatly stimulated production of fuels and chemicals from renewable sources. Lignocellulosic biomass has been considered as one of the potential sources for a variety of fuels and industrial chemicals. 5-Hydroxymethylfurfural (HMF) has been identified as an excellent platform molecule because it is a flexible intermediate for the synthesis of bio-renewable fuels and materials. HMF can be easily obtained from acid-catalyzed hydration of biomass-derived carbohydrates (hexoses) in various media. HMF can be converted to energy products such as 2,5-bis(alkoxymethyl)furans (BAMFs), monomers for high-value polymers such as 2,5-bis(hydroxymethyl)furan (BHMF), and valuable intermediates for fine chemicals. Recently, magnetic nanoparticle based catalysts attracted more attention due to their good stability and easy separation from the reaction mixture by a permanent magnet. This unique magnetic separation property makes MNPs more effective than conventional filtration or centrifugation as it prevents loss of the catalyst. This dissertation work focuses on, firstly, studying the effectiveness of silica coated magnetite (Fe3O4) nanoparticles MNPs supported with sulfonic acid groups (Fe3O4@SiO2-SO3H) on the dehydration of glucose to HMF. Secondly, preparing a cost-effective catalytic transfer hydrogenation system for the selective transformation of HMF into BHMF via Meerwein-Ponndorf-Verley (MPV) reaction over the copper iron magnetic catalyst supported on activated carbon in ethanol solvent with the absence of molecular hydrogen. Thirdly, producing alkoxymethylfurans (AMFs) which are considered a potential biofuels by using two-step sequential reactions with cheap heterogeneous zinc-iron oxides magnetic nanocatalyst for the hydrogenation of HMF to furfuryl alcohols in various alcohols solvents in the absence of molecular hydrogen followed by solid Brønsted acid ... |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| العلاقة: | https://scholarsjunction.msstate.edu/td/2485Test; https://scholarsjunction.msstate.edu/cgi/viewcontent.cgi?article=3484&context=tdTest |
| الإتاحة: | https://scholarsjunction.msstate.edu/td/2485Test https://scholarsjunction.msstate.edu/cgi/viewcontent.cgi?article=3484&context=tdTest |
| رقم الانضمام: | edsbas.DDD4D66B |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |