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 21 for “"carbonisation"”.
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Hydrothermal Carbonisation of Novel Biomasses
… the global energy economy. Hydrothermal Carbonisation (HTC) is a technology wherein biomass exposed to subcritical water at 180 °C – 260 °C is thermochemically converted into an energy-dense “hydrochar” with strong thermal and elemental similarities to fossil coal. However, key aspects of …
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Hydrothermal and ionothermal carbon structures
… materials employing the process of hydrothermal carbonisation (HC) is described. In the second part, the synthesis of heteroatom - containing carbon materials for electrochemical and fuel cell applications employing ionic liquid precursors is presented. On base of a thorough review of the …
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Valorisation de la biomasse contaminée par des métaux lourds en hydrochar pour l’adsorption des micropolluants et du CO2
… biomasses contaminées. Dans cette optique, la carbonisation hydrothermale constitue un procédé de conversion thermochimique prometteur pour transformer une biomasse contaminée en un matériau fonctionnel. Les deux objectifs phares de cette thèse sont, d’une part, la valorisation d’une biomasse …
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Osteogenese nach Laserosteotomie mit einem CO2-Laser im Vergleich zur Osteotomie mit konventioneller Sägetechnik - eine tierexperimentelle Studie
… results of previous studies the appearance of carbonisation could be prevented in some cases. If the key is found to reduce the risk of carbonisation to the maximum the future is open for the laser in orthopaedic surgery.
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Low cost, small-scale charcoal production in the Western Cape
… produced from the alien species Acacia Saligna. Carbonisation was effected using a Tongan drum kiln and average yields on a dry basis of 19.1 (excluding fines production) were attained. With fines included, the yield increased to 31.4 . It was shown that the earnings of woodcutters could increase …
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Nanostructured carbohydrate-derived carbonaceous materials
… the combined use of carbohydrate hydrothermal carbonisation (HTC) and templating strategies is demonstrated as an efficient route to nanostructured carbonaceous materials. HTC is an aqueous-phase, low-temperature (e.g. 130 – 200 °C) carbonisation, which proceeds via dehydration / …
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Hydrothermal Processes Applied to Sludge Reduction
… One of these technologies is HydroThermal Carbonisation (HTC), where sludge is heated up to 180-250 °C at water vapour pressure producing a solid product enriched in carbon for different possible exploitations. The aim of this work is to apply HTC to different kinds of sludge such as …
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Pollution reduction with processed waste materials
… the microwave-assisted hydrothermal process for carbonisation of waste materials. Three waste materials were investigated Prosopis africana shell (from Nigeria), rapeseed waste (from the UK) and coconut husks (a well-studied material in carbon science). The result shows that the …
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Desarrollo de sustratos de carburo de silicio mediante carburización e implantación iónica de silicio monocristalino
… (2) Silicon Carbide synthesized by Si carbonisation and (3) Silicon Carbide and Gallium Nitride heteroepitaxial growth on carbonized Si. All these structures are fabricated by techniques derived from classic (i) Ion Beam Induced Crystallization (IBIC), (ii) Chemical Vapour Deposition …
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Hydroxyl functionalities of middle rank british coals
… parameters as opposed to, or in addition to, carbonisation parameters. In view of this it is important to realise the functional groups on the coal hydrocarbon skeleton. In this research it was attempted to characterise coals of various rank (and subsequently their macerals) via methods …
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Propriétés fonctionnelles du charbon de bois en fonction de la sévérité des feux de forêt
… 4 souligne la difficulté d'expliquer le taux de carbonisation du matériel échantillonné, mais nous amène à supposer l'existence de résidus de carbonisation plus ou moins labiles pouvant à court terme réduire la minéralisation du carbone et augmentér la disponibilité de NH 4+ . Ces constatations …
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AGRICULTURAL ANALYSIS BY PLASMA EMISSION SPECTROSCOPY WITH SLURRY ATOMISATION
… procedures. For fibrous materials, prior matrix carbonisation was advantageous. Results obtained using these procedures and simple aqueous calibration showed excellent agreement with certified values of reference materials. Electron number density (ne), excitation temperature (Texc) and …
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Power Market Regulatory Structures and Electricity Security of Supply in Ghana
… analysis shows that with the current trends in carbonisation and using gas resources to support electricity security of supply is the best option.<br/><br/>The second part of the study examines the impact of some power market-specific variables on electricity security of supply. Using the panel …
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Hydrogen Cryosorption of Micro-Structured Carbon Materials
… to the assessed microstructural properties. The carbonisation processes of plasma carbons from the microwave splitting of methane, and biochars from the pyrolysis of Miscanthus, were intensively studied primarily based on Raman spectroscopy, in conjunction with other characterisation techniques …
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Exploring high-resolution carbon isotopes in archaeological charcoal as a rainfall seasonality proxy
… values for ΔP and PS/PW are attributed to carbonisation effects, including 13C depletion and volume shrinkage leading to reduced sampling resolution, which lead to a repeated but quantifiable overestimation of summer rainfall in charcoal. In the WRZ, seasonal amplitudes are dulled relative …
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Development of fire retardant timber treatments
… phosphate formulations promoted carbonisation of the timber structure. A coherent barrier layer was formed by the organoclay; however, the improvement was not effective enough to warrant further investigation. Combinations of nanometric oxides and phosphoric acid were effective. …
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Evaluating dry woodlands degradation and on-farm tee management in kenyan drylands
… a rate below the MAI; 4) promotion of efficient carbonisation technologies and practices to increase charcoal recovery; 5) promotion of efficient combustion technology and cooking practices to reduce demand side pressure, and; 6) encourage fuel switching to other fuels like LPG and electricity.
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Sustainable biomass-derived hydrothermal carbons for energy applications
… increasing. In this regard, hydrothermal carbonisation (HTC) has shown to be an effective means of conversion of biomass-derived precursors into functional carbon materials. However the attempts to convert raw biomass, in particular lignocellulosic one, directly into such products have …
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Efecto del vapor de agua en la adsorción de CO2 postcombustión
… optimised and enhanced by means of hydrothermal carbonisation followed by activation in CO₂ atmosphere. The results achieved are more far-reaching than those reported in the patent ES2526259. On the other hand, under a constant relative humidity of 20%, a bed of a biomass carbon doped with …
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