Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"Hydrothermal process"”.
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Nanoscale insight into tribomechanical and hydrothermal process at calcite surface
… nucleation are controlled by interfacial processes that operate at the nanoscale, where chemical, mechanical, and thermal effects converge to regulate frictional behavior. Among the minerals that compose the lithosphere, calcite is particularly significant due to its abundance, ductility, …
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Hydrothermal Process for Bioenergy Production From Corn Fiber and Swine Manure
… food prices, and efficiency of the corn milling process, other types of liquid fuels such hydrocarbons from thermochemical conversion of biomass have become potentially promising. This study aims at investigating the oil-formation mechanism during hydrothermal conversion of swine manure. For the …
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Hydrothermal Process of Swine Manure to Oil Using a Continuous Reactor System
Hydrothermal processing of swine manure is a novel technology that has shown very promising results in treating waste and producing oil. Oil yields of up to 70% were achieved in batch experiments. Since a continuous-mode process is more applicable for scale-up operations, a continuous hydrothermal …
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Characterization of nanostructures ZnO synthesized through hydrothermal method
… be derived using a variety of techniques. Using hydrothermal synthesis, ZnO nanostructures can be produced easily on a large scale due to the low temperature involved. Among the factors that influence the crystallinity of ZnO nanostructures are types of alkaline solution, the alkaline pH value …
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Hydrothermal processing of high-lipid biomass to fuels
… be dewatered significantly to form biofuels. A hydrothermal environment, utilizing a highpressure, high-temperature, water-based medium, is well-suited for processing these dilute biomass feedstocks. Conversion of high-lipid model feedstocks to bio-crude oils was investigated over temperatures …
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Pollution reduction with processed waste materials
… insight into the possible application of the processed materials during the waste management processes, thereby helping in converting the waste materials which would have been a nuisance into useful products. Pyrolysis and composting were utilized as the waste management techniques for …
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RECYCLING OF WASTE BLOOD INTO FUNCTIONAL CARBON NANOPARTICLES
… alternative anticoagulant therapies. Through a hydrothermal process, optimal conditions for HD synthesis were identified at 230°C for 10 minutes, maximizing fluorescence intensity and carbon nanoparticle quality. Characterization confirmed HDs’ carbon-based structure, nitrogen-doping, and size …
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Catalytic Role of Boron Nitride in the Thermal Decomposition of Ammonium Perchlorate
… variations of BN have been synthesized using a hydrothermal process; BN nanoribbons, Boron Rich BN, Nitrogen-Rich BN, and high surface area BN. It is shown that the decomposition of AP is significantly altered when in the presence of BN and the mechanism through which BN catalyzes the …
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Characterization of biofuel from diatoms via hydrothermal liquefaction
Previous studies of hydrothermal liquefaction (HTL) converting low lipid content microalgae (i.e., Chlorella pyrenoidosa and Spirulina platensis) have shown potential to utilize low lipid microalgae to produce bio-crude oil. Diatoms are a major group of microalgae in water bodies with a high growth …
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Hydrothermal Processing of Barium Strontium Titanate Composites on Printed Circuit Board for Thin Film Varactor Applications
… Sol-gel derived powders are very reactive to the hydrothermal process. The resultant film permittivity is the highest, ranging from 200 to 260, but with a limited tunability of 1%. Ceramic derived powders are compatible with the process. The permittivity is less than that of sol-gel derived, with …
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Analysis of lunar oxygen production methods under varying lunar conditions
… combined to provide a comprehensive look at each process and their processing requirements (for example, the mass a processing plant requires, the speed at which the oxygen could be produced, and the cost of setting up such a processing system). There are three methods of in-situ oxygen production …
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A study on wettability properties of rutile-phase TiO2 nanostructure film
… application. TiO2 is fabricated using the hydrothermal synthesis method at 150°C. The fluorine-doped tin oxide (FTO) is used as a substrate to grow the TiO2 nanostructure by mixing hydrochloric acid (HCl), deionised water (DI) and titanium (IV) butoxide (TBOT). The effects of the duration …
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Fabrication of nanorod TiO2/CU2O heterostructure thin film
… and p-Cu2O thin film were fabricated using hydrothermal and electrodeposition method, respectively. The fabrication parameters were investigated to obtain the optimum parameters of TiO2 thin film. The TiO2 thin film exhibited optimum 16 hours duration of hydrothermal process with the …
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Comparative study of nanorods and nanoflowers TiO2 thin film for heterostructure application
… n- type TiO2 thin filmswere produced using a hydrothermal method with some fabrication parameters studied during the preparation of TiO2 thin films such as Titanium Butoxide (TBOT) concentrations involving 0.07, 0.09, 0.11, 0.13 and 0.15 M. Another parameter is the duration of hydrothermal to …
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The fabrication of TiO2 nanostructures on porous silicon for thermoelectric application
… a novel and facile method of low temperature hydrothermal method was implemented for the growth of TiO2 nanostructures on porous silicon by using Titanium (IV) Butoxide (TBOT) and Hydrochloric acid (HCL) electrolytes. As a substrate, porous silicon samples were fabricated by …
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Template-based control for bottom-up nanostructures - multilayer block copolymer graphoepitaxy and masked ZnO nanowire growth
… design, systematic energy manipulation, and process-specific functionality. These engineering principles were fundamental to the thesis research, and could be applicable other directed self-assembly systems. Also, bottom-up growth provides a parallel process for fabricating high-resolution, …
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Synthesis and characterisation of hybrid Zn0-carbon nanostructures for potential applications in hydrogen storage
… the synthesis of ZnO nanorods (NRs). Using the hydrothermal process, vertically aligned ZnO NRs were grown on different seed particles which resulted in the different sizes and distribution of nanorods. ZnO NRs were used as templates in the deposition of ZnO-CNFs at various temperatures (500, …
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Graphene derivatives for Li-ion batteries
… is achieved through a novel one-step in situ hydrothermal process, yielding distinctive porous and conductive peony-like graphene/NiO nanohybrids. The integration of graphene enhances the current flow of NiO while also effectively regulating the restacking and aggregation of nanoparticles. …
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Lignin valorization
… was extracted from beech wood by two different hydrothermal alkaline treatments, which use NaOH and Ba(OH)2 as base and by an acid-catalyzed organosolv process. Moreover, lignin was isolated from bamboo, beech wood and coconut by soda treatment of the biomasses. A comparison of the structural …
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Metal oxide nanostructures and their applications
… with environment-friendly precursors and processes with varied size and morphology for their effective utilization in specific applications. This thesis focuses on the synthesis, characterizations and specific applications of two undoped and doped metal oxide nanostructures, i.e. zinc …
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