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 3497 for “"biomass"”.
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Downdraft gasification of biomass
… process within downdraft gasifiers using biomass feedstocks. In addition to investigations with an open-core gasifier, a novel open-topped throated gasifier was designed and used. A sampling system was designed and installed to determine the water, tar and particular content of the raw …
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Ablative pyrolysis of biomass
The primary objectives of this work were to design, construct, test and operate a novel ablative pyrolysis reactor and product recovery system. Other key objectives included the development of an ablative pyrolysis reactor design methodology, mathematical modelling of the ablation process and …
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Towards More Coherent and Sustainable Biomass Policy: Examining European biomass-to-energy planning
Coordination of policies embracing biomass use has been called for in order to speed up progress towards the European Union renewable energy and climate change goals. Policy coordination and coherence is also required if the many complex and diverse issues constraining sustainable bioenergy …
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Supercritical Water Gasification of Biomass
… and strategic challenges of technology nowadays. Biomass is one of the ideal candidates for reliable and abundant renewable energy production, since it is largely available, universally distributed and potentially CO2 neutral, if utilized in a sustainable way. There are several processes for …
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Hydrothermal carbonization of waste biomass
… content higher than 60%). As a matter of fact, biomass is transformed into hydrochar because of the properties of hot pressurized water, that acts both as a reactant and as a catalyst. The HTC process has been studied from many years, although at present not all the chemical reactions that occur …
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Biomass Crops in Marginal Lands.
… bioenergy/industrial non-food crops. Cultivating biomass crops on marginal land unsuitable for food production is consistently proposed as an alternative to minimize iLUC effects about land-use competition for food production, and its adverse effects (direct or indirect) on food security, land …
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Fluidized bed gasification of biomass
A fluidized bed process development unit of 0.8 m internal diameter was designed on basis of results obtained from a bench scale laboratory unit. For the scaling up empirical models from the literature were used. The process development unit and peripheral equipment were constructed, assembled and …
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Biomass conversion in oleaginous yeasts
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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Models of plankton biomass spectra
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
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Biomass Characterization and Insulation Optimization Studies
<p>This study indicates how biomass materials can be effectively used as naturally sustainable alternatives to insulation materials. Barley grains and oak leaves, straw, and jute are collected, and crushed into powders/ chopped pieces. The physical characteristics are measured to characterize each …
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Co-gasification of coal and biomass
… produce electricity and liquid fuels. Coal and biomass are used in a gasfier as feedstock to produce syngas but problems like high carbon footprints and GHG emissions are associated with coal gasification. On the other hand, high preprocessing cost and tar formation are the problems related with …
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Gasification of in-Forest Biomass Residues
… Ponderosa Pine sawmill residues at high biomass loadings, short mean residence times (2-5 sec), and 27.7 MPa pressures. Each run with the SCWG system typically processed several 100 g of biomass/water slurry mixture. We evaluated the effect of operating temperatures (from 700K to 900K) …
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Biomass Integrated Gasification Combined Cycles (BIGCC)
Conversion of biomass to energy does not contribute to the net increase of carbon dioxide in the environment, therefore the use of biomass waste as a clean and renewable fuel source is an attractive alternative to the use of fossil fuels. Biomass can be converted to energy via direct combustion or …
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Mesophilic Fermentative Hydrogen Production from Biomass
… co- and waste products of the food industry or biomass crops which have undergone minimum pre-treatment would be desirable. Also, whilst much research to date has focused on use of pure bacterial strains, an easily obtainable mixed microflora would be preferable to avoid costs of substrate …
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Innovative Methods for Biomass Sugars Utilization
The (bio)conversion of lignocellulosic biomass to biofuel (such as ethanol and furans) requires both hexose and pentose sugars released to be fully utilized to make this process cost-effective. However, the efficient xylose utilization through either fermentation or chemical conversion is the …
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Tailored heterogeneous catalysts for biomass conversion
… to address pressing challenges in sustainable biomass conversion. The introductory chapter outlines the importance of catalysis in advancing sustainable technologies, highlighting the need for catalysts that balance high activity, selectivity, and stability under challenging reaction …
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Modeling macroalgae growth to optimize biomass.
… sensitivity analyses with the goal of maximizing biomass production by optimizing nutrient loading, depth in the water column (to control sunlight intensity and temperature), and location of fertilization points (to minimize "nutrient shadows" downstream in the kelp farm). Large (100-ha) kelp …
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