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.
Results
Showing 1 to 14 of 14 for “"hydrodeoxygenation (HDO)"”.
-
Catalytic upgrading of biomass through the hydrodeoxygenation (HDO) of bio-oil derived model compounds
… transition metal oxide catalysts for selective hydrodeoxygenation (HDO) of bio-oil derived model compounds using reactivity, computation and characterization studies. The first section focuses on developing structure-reactivity relationships on bulk and supported MoO₃ catalysts for the HDO of …
-
High Pressure Micro-Scale Studies of Fast-Hydropyrolysis and Catalytic Hydrogenation of Biomass and Related Model Compounds
… Fast pyrolysis of biomass followed by catalytic hydrodeoxygenation of bio-oil is considered a promising biomass conversion route to produce drop in hydrocarbon fuels. The H2Bioil process was proposed as an integrated high pressure fast hydropyrolysis and catalytic vapor phase hydrodeoxygenation …
-
Catalytic Hydrodeoxygenation of Guaiacol over Noble Metal Catalysts
… an upgrading process is required. Catalytic hydrodeoxygenation (HDO) is a rapidly developing technology for oxygen removal from pyrolysis bio-oils and noble metal catalysts have shown promising activities, especially as compared to the traditional hydrodesulphurization catalysts (e.g. …
-
Revisão da literatura: desoxigenação catalítica de ácidos graxos e derivados – síntese de bio-óleo.
… of fuels from biomass. The Pyrolysis and Hydrodeoxygenation (HDO) consist a feasible route for production of bio-fuels in industrial scale, together to conventional fuels and compatible with the infrastructure as we know. However, the competitiveness of this route is still far from …
-
Catalytic Hydrodeoxygenation of Bio-Oil Model Compounds (Ethanol, 2-Methyltetrahydrofuran) over Supported Transition Metal Phosphides
The objective of this project is to investigate hydrodeoxygenation (HDO), a crucial step in the treatment of bio-oil, on transition metal phosphide catalysts. The study focuses on reactions of simple oxygenated compounds present in bio-oil -- ethanol and 2-methyltetrahydrofuran (2-MTHF). The …
-
Development of Heterogeneous Catalysts for Upgrading Biomass Pyrolysis Bio-Oils into Advanced Biofuels
… from biomass pyrolysis. Catalytic cracking and hydrodeoxygenation (HDO) are two most promising bio-oil upgrading techniques for biofuel production. Heterogeneous catalysts are essential for upgrading bio-oil into hydrocarbon biofuel. Although some progresses have been made, the cost and …
-
Carboxylic Acid Hydrodeoxygenation over Supported Noble Metal Catalysts
<p>Carboxylic acid hydrodeoxygenation (HDO) over supported noble metal catalysts was carried out in order identify the main challenges associated with supported monometallic catalysts and identifying solutions that may increase the practicality of these high activity metals. Using propionic acid as …
-
Novel Carbon-supported Transition Metal Phosphide Catalysts for Hydrodeoxygenation of Fast Pyrolysis Oil
Catalytic hydrodeoxygenation (HDO) is considered to be the most promising route to upgrade pyrolysis oil to liquid transportation fuels. The objective of this research was to explore inexpensive supported metal oxides/metal phosphide catalysts for the upgrading of pyrolysis oil into advanced …
-
Tailored heterogeneous catalysts for biomass conversion
… shifts to bifunctional catalysts capable of both hydrodeoxygenation (HDO) and deoxygenation reactions, essential for converting biomass-derived oxygenates into hydrocarbons. Here, the interplay between metal sites and acid sites on the support surface is investigated, demonstrating how these …
-
Catalytic Upgrading of Lignin From Biomass
… utilization of RCF lignin oil through hydrodeoxygenation (HDO) to jet-range aromatics using molybdenum carbide (Mo2C) in a trickle-bed reactor. The study of neat lignin oil HDO elucidated two key findings: 1. The Mo2C surface is oxidized by neat lignin oil, necessitating higher reaction …
-
Molybdenum trioxide and molybdenum carbide as promising hydrodeoxygenation catalysts for biomass conversion
… earth-abundant cheap catalysts that perform hydrodeoxygenation (HDO) at relatively low temperatures ( 673 K) and ambient H2 pressures wherein oxygen is selectively removed as water. However, there exists a significant knowledge gap in understanding the stability and the active phases …
-
Lab-scale fast-hydropyrolysis and vapor-phase catalytic hydrodeoxygenation for producing liquid fuel range hydrocarbons from intact biomass
… that are catalytically upgraded in downstream hydrodeoxygenation (HDO) to produce hydrocarbons. This process has been modeled to have high carbon and energy efficiencies of ~70% and ~75%, respectively.</p> <p>This dissertation presents the results of a lab-scale experimental proof-of-concept …
-
Effects of phosphorus on bond rupture during hydrodeoxygenation and dehydrogenation reactions on ruthenium
… and active towards C-O bond rupture during hydrodeoxygenation (HDO) of oxygenates, making them potential candidates for bio-oil upgrading. However, the mechanism by which the C-X (X = O, C, H) bond ruptures and the corresponding intrinsic barriers (i.e., for C-H, C-C, and C-O bond rupture) …
-
High-Pressure Vapor-Phase Catalytic Hydrodeoxygenation of Lignin-Derived Compounds to Hydrocarbons on Bimetallic Catalysts in the Range of 0.2-2.4 MPa.
… fuels and chemicals via high-pressure catalytic hydrodeoxygenation (HDO) of the lignin-derived fraction of biomass. Catalytic HDO is performed as a second-stage process to upgrade the intermediate lignin-derived oxygenates produced in first-stage processes such as: the H2Bioil …