Characterization and science of an aluminum fuel treatment process
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, February 2018.
Materials Literature
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IMPACT OF PRETREATMENT METHODS ON FAST PYROLYSIS OF BIOMASS
Biomass is considered a renewable source of energy with minimum carbon foot print if managed sustainably. The majority of the worlds energy is spend on transportation, and fast pyrolysis of biomass could be a potential route for production of a sustainable liquid transportation fuel. However, there are several hurdles…
The effect of Ti-6Al-4V microstructure on the performance of ultrasonic soft tissue cutting tips
Mill annealed Ti-6Al-4V is a commonly used material in high-power ultrasonic devices, including cutting tips for ultrasonic soft tissue surgical devices. The advantages of Ti-6Al-4V include its high elastic strain limit, low acoustic attenuation, and biocompatibility. It is known that the microstructure of Ti-6Al-4V c…
Synthesis and Characterization of Rare-Earth Tellurides and Their Composites For High-Temperature Thermoelectric Applications
Radioisotope thermoelectric generators (RTGs) are solid-state energy conversion devices and have been a vital power generation technology for deep space missions conducted by the National Aeronautics and Space Administration (NASA). At the heart of these generators are thermoelectric materials that convert heat given…
Green Strategies for the Cleaning of Works of Art Setting Up of an Analytical Protocol for the Evaluation of Cleaning
In last decades, the safety of both artworks and restorers during cleaning operations, has been the subject of many research works, aimed at the development of gel-systems that confine the solvent action to the very surface thus preventing its absorption into the paint layers and minimizing operators’ exposure. \nIn t…
Model-based Design and Optimization of Vanadium Redox Flow Batteries
Das Ziel der vorliegenden Arbeit ist die Steigerung des Wirkungsgrads der Vanadium Redox Flow Batterie (VRFB) mit einem modellbasierten Ansatz. Zu Beginn wird eine detaillierte Anleitung zum Aufbau eines VRFB-Modells auf Systemebene gegeben. Modelliert werden Leerlaufspannung, ohmsche Überspannung, Konzentrationsübers…
Prozessentwicklung zur Gewinnung von Oxymethylenethern (OME) aus Methanol und Formaldehyd
Die vorliegende Arbeit behandelt grundlegende Fragestellungen wie die Synthese und Stoffeigenschaften bis hin zur Prozessentwicklung bzw. -optimierung von Oxymethylenethern (OME). Dieser innovative Dieselkraftstoff kann aus nachwachsenden Rohstoffen gewonnen werden. OME tragen nachweislich zur Senkung von Stickoxid- u…
Erratum: A Method for Determining the Corrosion Rate of a Metal under a Thin Electrolyte Film [J. Electrochem. Soc., 162, C135 (2015)]
A cm -2 Electrolyte film thickness, X f / µm
Correction: 3D Au-decorated Bi 2 MoO 6 nanosheet/TiO 2 nanotube array heterostructure with enhanced UV and visible-light photocatalytic activity
Correction for ‘3D Au-decorated Bi 2 MoO 6 nanosheet/TiO 2 nanotube array heterostructure with enhanced UV and visible-light photocatalytic activity’ by Jingsheng Cai et al. , J. Mater. Chem. A , 2017, DOI: 10.1039/c7ta02077e.
Thermal conductivity of GaAs/Ge nanostructures
Superlattices are of great interest as platform materials for thermoelectric technology that are capable of directly converting low-grade heat energy into useful electrical power. In this work, the thermal conductivities of GaAs/Ge superlattice nanostructures were investigated systematically in relation to their morph…
Production of protein‐based polymers in Pichia pastoris
Recombinant nonhydroxylated gelatins based on mouse type I and rat type III collagen sequences were secreted from the methylotrophic yeast Pichia pastoris, using the Saccharomyces cerevisiae -mating factor prepro signal. Proteolytic degradation could be minimized to a large extent by performing fermentations at pH 3.0…
Optimization pathways to improve GaInP/GaInAs/Ge triple junction solar cells for CPV applications
La tecnología de concentración fotovoltaica (en inglés, Concentration Photovoltaics, CPV) ha experimentado un intenso desarrollo desde principios de los años 2000. En particular, las células solares de triple unión (GaInP/GaInAs/Ge) ajustadas en red siguen dominando el mercado CPV. Esta tesis pretende contribuir en la…
Thermodynamic properties of rare earth sesquioxides
Afin de développer la base de données thermodynamiques contenant des sesquioxydes de terre rare (RE2O3), des descriptions thermodynamique précises pour toutes les phases de RE2O3 stable et métastable sont requises. Les sesquioxydes de terres rares ont de nombreuses polymorphes, soit (en ordre de faible à haute tempéra…
The influence of prior creep damage on the fracture localisation in X20 CrMoV12-1 cross-weld creep tests
Many of Eskom's coal fired power plants have an average age of 170 000 hours and a few operating close to 300 000 hours. Main steam temperatures experienced in a power plant vary between 535-555°C. These operating conditions place main steam pipe components to operate within the creep regime. It is of utmost importanc…
Evaluation of Fuel Assembly Bow Penalty Peaking Factors for Ringhals 3 : Based on a Cycle Specific Core Water Gap Distribution
In recent years, fuel assembly bow in Ringhals 3 has started to increase again after lower levels of bow. Normally, the fuel assemblies are straight axially. One of the consequences of fuel assembly bow is perturbed power distribution across the core, resulting in smaller margins of safety during operation. A way of e…
Salinity responses of benthic diatoms inhabiting tidal flats
We performed culture experiments using intertidal benthic diatoms collected from a river mouth tidal flat (Fujimae Tidal Flats, Nagoya, Japan) to study their responses to salinity. The six species examined were Navicula aff. erifuga, Karayevia amoena, Tryblionella apiculata, Planothidium delicatulum, Melosira monilifo…
Synthesis, crystal structure, spectroscopy, thermal properties and carbonic anhydrase activities of new metal(II) complexes with mefenamic acid and picoline derivatives
The mononuclear six metal(II) complexes ([Co(mef)2(3-pic)2(CH3OH)2] (1), [Ni(mef)2(3-pic)2(CH3OH)2] (2), [Cu(mef)2(3-pic)2] (3), [Co(mef)2(4-pic)2] (4), [Ni(mef)2(4-pic)2] (5), and [Cu(mef)2(4-pic)2] (6) with mefenamic acid and picoline ligands were synthesized, characterized, and their carbonic anhydrase inhibitory a…
Time-Encoded Thermal Neutron Imaging using Large-Volume Pixelated CdZnTe Detectors
CdZnTe detectors are commonly used for room-temperature gamma-ray spectroscopy and imaging in a variety of applications including nuclear security, nuclear medicine, and space science. The material's long-established sensitivity to thermal neutrons, however, is less utilized. Generally speaking, the performance of neu…
Preparation and characterization of nanocellulose from wheat bran
Nanocellulose is being studied to a great extent around the world as it has great potential and many possible applications, for example, as an additive in greener polymers in a world where the need for replacements for fossil fuel based polymers increase. Different sources of cellulose are being considered for the pro…
Physical and thermal characterization of ground wood chip and ground wood pellet particles
The goal of the present study is to characterize the ground chip and ground pellet particles with respect to their size, shape, density, flow properties, drying and pyrolysis mass loss. Commercial wood pellets and pulp-quality wood chips are used in this study. These commercial samples are ground in the laboratory usi…