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 14 of 14 for “"Catalytic Upgrading"”.
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Catalytic upgrading of residual fuel oil
Includes bibliographical references.
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Catalytic Upgrading of Lignin From Biomass
… lignocellulose. Effective and economical lignin upgrading techniques have remained elusive, largely due to the complex structure and reactivity of lignin during processing. Broadly, my graduate work has focused on designing experiments to gain fundamental understanding while working with complex, …
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Catalytic upgrading of muconates for renewable chemical applications
… commercial relevance. This work focuses on the catalytic conversions of cis,cis-muconic acid (cis,cis-2,4-hexadienedioic acid), a polyunsaturated C6 dicarboxylic acid that can be microbiologically produced from lignocellulosic biomass streams. The state of catalysis for Diels-Alder reactions …
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Non-thermal Plasma Assisted Catalytic Upgrading of Low-cost Hydrocarbons
The catalytic upgrading of low-cost hydrocarbons under mild conditions (< 100 ℃ and atmospheric pressure) is explored with the assistance of non-thermal plasma. This novel technology can effectively convert methane at near ambient temperature and atmospheric pressure. A methane conversion higher …
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Catalytic upgrading of biomass through the hydrodeoxygenation (HDO) of bio-oil derived model compounds
… chemicals. Of the many conversion alternatives, catalytic fast pyrolysis has emerged as an attractive technology to convert biomass into fuel additives and value-added chemicals. Current pyrolysis oils or bio-oils are incompatible with refinery streams due to their high acid, water, and water …
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Understanding the role of local condensed phase environments in pyrolytic and catalytic biomass conversion
… oxygenates via fast pyrolysis followed by (2) catalytic upgrading to the desired fuels or precursor chemicals. These reactions of biomass conversion usually occur in the condensed phase – either in the melt phase for pyrolytic reactions or in the solvent phase for catalytic upgrading reactions. …
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Investigation of Recyclable and Renewable Crude oil from Biomass and Plastics
… and sent to BASF Corporation in Iselin, NJ for catalytic upgrading potential. In this study, the feedstock ranged from virgin plastic resins (LDPE, HDPE, PS, PP), recycled rubber from tires to poplar wood chips. It was found that, increasing the temperature from 500 ∘C to 600 ∘C for LDPE and …
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Energy efficiency in dual fluidised bed fast pyrolysis
… The dual fluidised bed design allows in situ catalytic upgrading of bio-oil, by providing the conditions required for the regeneration and decoking of catalysts. The first version of the CRIPS process (CRIPS 1) emphasised the need for an energy balance approach to model the pyrolysis process …
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Rational design and synthesis of zeolite acid catalysts for applications in biomass conversion
… sustainable production of fuels and chemicals. Catalytic upgrading processes must remove oxygen and add hydrogen while targeting oxygen-containing functional groups. Catalysts must be water-tolerant, stable under hydrothermal conditions, and accessible for large organics. Zeolites are active and …
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Partial Upgrading of Lignocellulosic Bio-Oil via Deep Catalytic Hydrotreating
… the bio-oil in the refinery lines. Therefore, an upgrading step is necessary to make the bio-oil admissible to the refinery. The ultimate goal of this research is to produce biofuel equivalent to conventional fuels from lignocellulose-derived bio-oil. The main objective of this study is to reduce …
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Selective dehydration of polyols over solid acids and metal-acid bifunctional catalysts: Towards a catalytic toolbox for rational catalyst design
… petrochemicals has lead to increased interest in catalytic means of upgrading sugar-derived molecules into useful commodities. While some biorenewable chemicals aim to break into the existing market as a new product (polylactic acid, or PLA, is one example), there is also interest in developing …
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Reactor Design for Partial Upgrading of Bitumen via Aquaprocessing
… America. Under these circumstances, partial upgrading processes such as Aquaprocessing are envisioned as a potential solution. The synthetic crude oil produced from Aquaprocessing of bitumen requires 50 vol.% less diluents than the Athabasca bitumen to meet the pipeline specifications. This …
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Conversion of waste organic carbon and nutrient streams to renewable fuels through integrated biological funneling and catalytic hydrothermal upgrading
… and nutrient capture coupled with aqueous catalytic upgrading of the resultant biomass storage products presents two promising methods of advanced wastewater valorization: (i) conversion of microalgae biomass (which can be cultivated in wastewater effluent) into renewable fuel blendstocks …
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Mechanistic and spectroscopic methods for identifying reactive intermediate structures and active site properties over metals, metal oxides, and metal phosphides
Catalytic upgrading of biomass derivatives (i.e., ethanol from fermentation and bio-oil from pyrolysis) requires increased understanding of reaction mechanisms and catalyst properties in order to improve the design of highly selective, reactive, cost effective, and stable catalysts. In situ …