Modelling the impact of supersonic aviation emissions on atmospheric ozone concentrations using data-driven methods

With renewed interest in the development of civil supersonic aircraft, their return in the future is becoming more ever more likely. The environmental impact of emissions in the stratosphere on climate and the ozone layer therefore needs to be explored. The stratospheric ozone levels determine the amount of harmful ultraviolet radiation reaching...

Investigation of aviation's contribution to tropospheric NOx-O3 presence

As global air traffic has continued to grow overthe past two decades, it has...

Fission products chemistry and scenario analysis of accident progression at Fukushima-Daiichi nuclear power station: Investigation of the Ba-Sr-Cs-Mo-O system

The severe accident at the Fukushima-Daiichi Nuclear Power Station in 2011 has shown the necessity to study the impact of the release of hazardous fission products. This work investigates the Ba-Cs-Sr-Mo-O system, which contains some of the most abundantly produced fission products, as well as fission products that carry a great health risk on...

Adsorption of Phosphorus on a Ru(0001) surface: A density functional theory study

Interest in transition metal surfaces has grown in fields such as catalysts and semiconductors. Models of initial adsorption and growth of adsorbates are used to verify if certain structures are formed. Structural complexity and diversity of overlayers often determines this growth. Understanding the difference between a clean single crystal...

Advecting Superspecies: Reduced order modeling of organic aerosols in LOTOS-EUROS using machine learning

Chemical transport models (CTMs) are used to improve our understanding of the complex processes influencing atmospheric composition, as well as provide operational air quality forecasts and model potential future air quality scenarios. Numerical tracers in CTMs track the concentration of chemical species, while operators simulate various...

Vivianite Precipitation: a Novel Concept to Remove Iron from Groundwater: From waste to value

The removal of iron from groundwater is essential to avoid aesthetic issues of the produced drinking water and to reduce maintenance cost of the system. The most applied iron removal method of oxidation and filtration produces large volumes of aqueous iron sludge of little value and the method is more likely to fail at high iron concentrations....

Modelling Internal Reforming Solid Oxide Fuel Cells with Surface Chemistry to Find Regions Susceptible to Carbon Deposition

The lifespan of internal reforming solid oxide fuel cells (SOFCs) is not yet sufficient. Among other design challenges, this is due to detrimental carbon deposition formations. This must be mitigated, without compromising the power output and efficiency of the fuel cell for it to become a commercial viable product. The carbon that is deposited...

High Throughput DFT Calculations on Single Atom Catalysts for Solar Fuel Generation

Fossil fuels have been the primary source of rising energy requirements for humankind. However, the extensive use of fossil fuels has led to an increase in Earth's surface temperature. To tackle rising energy demands and the increase in Earth's surface temperature, various organizations like Inter-governmental Panel for Climate Change and the...

Electrolytic Plasma Cleaning of Advanced High Strength Steels

The most commonly used material in the automotive industry is steel. Steel used in making Body-In-White (BIW) for cars are broadly classified as Advanced High Strength Steels (AHSS). These AHSS are produced by a well-defined alloying and specific annealing procedure. However, external oxidation of the constituent alloying elements from the steel...

Development of a finite rate chemistry solver with tabulated dynamic adaptive chemistry

Despite the onset of peta-scale computing, simulations of reacting flows with detailed chemistry is still considered computationally expensive. Better understanding of the chemistry of various fuels has led to increase in the complexity of the simulations in an effort to compute flows with real complex fuels. The increase in complexity makes CFD...

Spinning Arc Plasma Reactor: Characterisation of a novel reactor design for synthetic fuel production

In recent years, the energy transition has led to increasingly higher installed capacities of intermittent renewable energy sources. This has sparked the interest in power-to-fuel technology to store excess renewable energy in the chemical bonds of synthetic fuels. As a highly reactive, turn-key process, plasma-chemical conversion offers a...

Trace metal pollution in the Scheldt estuary - a statistical approach to estimate the metal partitioning coefficient for a suite of metals

Trace metals appear in estuarine systems in two forms: dissolved and particulate. <br/>Describing the partitioning between these two forms is done by a coefficient, K_d, which relies on a number of environmental parameters, such as the salinity of the water and the seasonally dependent biological activity. Although this coefficient is known to...

Lattice matched epitaxial shell growth on InZnP quantum dots: Towards a fully passivated surface

Quantum dots are semiconductor nanocrystals that exhibit size specific photophysical properties. Therefore, they can be applied as phosphors in LED lighting and television screens. The main issue regarding currently used quantum dots is that most of them are cadmium based (e.g. cadmium selenide). Because cadmium is highly toxic and carcinogenic,...

Design of a novel blood collection device for PSA analysis

Prostate cancer is the most common type of cancer for Dutch males. 1 out 9 males is diagnosed with prostate cancer during his life. 48% Of the diagnosis is for men older than 70 (IKNL, 2014). Antoni van Leeuwenhoek hospital and Nederlands Kanker Instituut do research in cancer diagnostics. This graduation project focuses on the development of a...

Ignition modeling in methane-oxygen rocket engines: Design and modeling of a methane-oxygen rocket engine igniter using reacting flows with computational fluid dynamics

The influence of using different chemistry model and different chemical kinetics schemes on modeling combustion inside a rocket engine igniter are investigated. An igniter for a LOX/CH4 rocket engine is designed and a CFD model is developed which is used to model the designed igniter. Verification and validation methods are discussed.<br/><br/>...

N,N'-dimethyl-1,4,5,8-naphthalene-carboxylicdimide as electrode material for cheap & large scale sodium ion batteries

Energy storage plays a key role in the transit from fossil fuels, as main energy source, to sustainable ones. In this work, it is tried to find an electrode material which can eventually be used in potentially cheap, large scale rechargeable sodium-ion batteries. This application would ideally be made of abundant, safe and environmental friendly...

Development and Validation of a New Eddy Dissipation Concept (EDC) Model for MILD Combustion

Moderate and Intense Low-oxygen Dilution (MILD) combustion is established to achieve high thermal efficiency and low pollutant emissions, including both NOx and soot. The Eddy Dissipation Concept (EDC) is the most widely used combustion model in the existing numerical studies of turbulent MILD combustion. It is easy to implement and has...