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 17 of 17 for “"Hydrothermal carbonization"”.
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Hydrothermal carbonization of waste biomass
Hydrothermal carbonization (in acronym, HTC) is a thermochemical conversion process through which it is possible to directly transform wet organic substrates into a carbonaceous material, referred as hydrochar. Hydrochar has chemical and physical characteristics that make it similar to fossil peats …
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Utilization of aqueous product generated by hydrothermal carbonization of waste biomass
Hydrothermal carbonization (HTC) is a thermochemical treatment process that allows for the conversion of relatively dilute biomass slurries into value added products which are hydrochar and filtrate. This investigation focuses on the potential for utilization of the filtrate (aqueous by-product) …
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Literature Survey of Wet-Waste and Hydrothermal Carbonization System: A Comparative Evaluation
<p>This thesis describes the process of Hydrothermal carbonization and a comparative assessment on recent work done on the process using different feedstocks such as Raw Apple (RA), Apple chip pomace (ACP), apple juice pomace (AJP), grape pomace (GP), macadamia nut-shell (MNS), Sewage Sludge (SS), …
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Sustainable valorization of biomass wastes by hydrothermal carbonization in a circular economy scenario
Recientemente, la carbonización hidrotermal (HTC) ha emergido como un proceso termoquímico prometedor para convertir residuos biodegradables húmedos en productos de valor añadido. Sus ventajas (bajo consumo energético, mínimas emisiones gaseosas y eliminación del secado previo) la hacen …
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Application of Hydrothermal Carbonization, Membrane Distillation, and Algae Cultivation for Sustainable Dairy Manure Treatment
… dairy manure treatment methods that incorporates hydrothermal carbonization (HTC), algae cultivation, and membrane distillation (MD). HTC converts dairy manure into a low-grade coal that can be used as an energy source, while expelling nutrients into the HTC aqueous product (HAP). The algae can be …
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Evaluating the Design and Economics of Commercial-Scale Hydrothermal Carbonization of Biosolids for Energy Generation
… energy from biosolid waste using a continuous hydrothermal carbonization reaction and to evaluate the economics of implementing the technology for TMWRF. The hydrothermal carbonization reaction was investigated by conducting batch reactions in the lab and by reviewing previously conducted …
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Pollution reduction with processed waste materials
… aspect of this research through dry and wet (hydrothermal carbonization) pyrolysis respectively. Under the wet pyrolysis, comparisons were made between the conventional and the microwave-assisted hydrothermal process for carbonisation of waste materials. Three waste materials were investigated …
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Hydrochar Enhanced Wood Pellets
… The process design includes a detailed HTC (Hydrothermal Carbonization) reactor design. Thorough economic analysis and hazard analysis were performed. The engineering design process and results of the project are provided in the sections that follow.
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Torrefied-Hydrochar Blend Wood Biomass Improvement for Fuel Pellet Production: A Tree-to-Customer Analysis
… using dry torrefaction in combination with a hydrothermal carbonization (HTC) binder made from the same feedstock for sale in the United Kingdom at a scale of approximately 100,000 metric tons per year. The primary mode of research was literary review. It was found that this process is …
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Upgrading biomass by hydrothermal and chemical conditioning
… thermal pretreatment technologies, known as hydrothermal carbonization and dry torrefaction. In dry torrefaction, also known as torrefaction or mild pyrolysis, dry solid biomass is treated in an inert gas environment in a temperature range of 200-300oC for more than one hour. In hydrothermal …
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Surface-Layer Semivolatiles Impact on Hydrochar Application For Fuel and Environment
… products of agro-industrial waste, focusing on hydrothermal carbonization (HTC) and pyrolysis. The studies in this dissertation focus on the extraction semi-volatile organic compounds from the surface of hydrochar known as secondary char (SC). Over the past decade, studies have shown SC to be a …
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Functional nanostructured hydrothermal carbons for sustainable technologies : heteroatom doping and superheated vapor
… nanomaterials using the established technique of hydrothermal carbonization (HTC). The incredible diversity of HTC was demonstrated together with small but steady advances in how HTC can be manipulated to tailor material properties for specific applications. Two main strategies were used to modify …
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REACTIVE TRANSPORT OF IRON AND HYDROCHAR COLLOIDS IN A HYDROCARBON-CONTAMINATED SUBSURFACE ENVIRONMENT
… in anoxic subsurface environments. Using hydrothermal carbonization and bone-meal extracts, several versions of the hydrochar were synthesized by systematically varying reaction conditions. The physical and chemical properties of the hydrochars were extensively characterized using a suite …
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Rare Earth Elements (REEs) Recovery and Hydrochar Production from Hyperaccumulators
… of 5 wt.%. Subsequently, microwave-assisted hydrothermal carbonization (MHTC) was used to convert the leaching residue into hydrochar to achieve a comprehensive utilization of GL biomass. Scanning electron microscopy (SEM) analysis revealed that the original structure of GL was destructed at …
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Production of biocoal from wastewater sludge-biomass feedstock
Thesis submitted in fulfilment of the requirements for the degree of Master of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2022.
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Hydrothermally stable heterogeneous catalysts for biorenewable-derived molecule conversions to chemicals
… difficulty by developing new catalysts with a hydrothermally stable scaffold and active group.</p> <p>From this work the development of the carbon catalyst is shown. First, I investigated of the hydrothermal stability of the current carbon catalysts in literature. Second, some model compound …
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Valorisation de la biomasse contaminée par des métaux lourds en hydrochar pour l’adsorption des micropolluants et du CO2
… 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 contaminée par …