Master thesis. Environmental Technology
Materials, chemical engineering and process simulations:
1. Development of mechanically stable solid sorbent agglomerates for high-temperature CO2 capture.
2. Development of new hybrid ceramic material: catalyst/sorbent for hydrogen production and high-temperature CO2 capture.
3. Chemical process simulation.
4. Development of multi-functional soil amendments based on mafic minerals for GHG emissions mitigation in agriculture.
Geology and numerical simulations:
5. Chemical interaction of CO2-rich fluids with pre-existing fractures in cap rocks.
6. Developments of new numerical codes and experimental setups for coupled deformation, reaction and flow in tight rocks.
7. Basin modeling with metamorphic phase changes.
8. Cellular automaton model for hydrocarbon expulsion from source rocks.
9. Mathematical modelling of fluid leak-off during hydraulic fracturing.
Project proposal 1: Development of mechanically stable solid sorbent agglomerates for high-temperature CO2 capture.
The aim of the project is to develop a novel agglomeration technique to produce spherical ceramic beads of mixed CaO/calcium aluminate ceramic for high-temperature CO2 capture application.
Several agglomeration techniques will be tested and evaluated to determine the most suitable technique for preparation of medium size agglomerate batches.
The influence of process parameters on the final microstructure of the sorbent (density, porosity) and the capture properties (reaction kinetic, absorption capacity, chemical durability) will be evaluated.
The mechanical properties of the produced agglomerates/granules will be fully characterized by crushing strength and attrition measurements. Mechanical and chemical properties of the developed agglomerates will be compared to the properties of the natural sorbents and to literature data available for other sorbents.
Contacts: Julien Meyer and Luca Di Felice.
Project proposal 2: Development of new hybrid ceramic material: catalyst/sorbent for hydrogen production and high-temperature CO2 capture.
Preliminary studies have shown it is possible to integrate catalytically active nano-particles of Nickel or Rhodium within the microstructure of the sorbent particles to create an “all-in-one” particle: hybrid CO2-sorbent particle with an active layer of Ni-particles.
This project will focus mainly on the development of stable “all-in-one” particles with special emphasis on the long-term chemical properties of the sorbent particles and the long-term activity of the catalytic particles.
The work will include the synthesis method optimization (impregnation/doping methods evaluation, catalyst loading, etc.) and the chemical and mechanical properties evaluation of the obtained materials. The development of such novel hybrid material would be a key step towards the commercialization of a sorption-enhanced reforming process.
Contacts: Julien Meyer and Luca Di Felice.
Available experimental apparatus at IFE for those two projects are: Thermogravimetric analysis (TGA) for the performance of studies on the CO2 sorbents, a laser scattering particle size distribution instrument, scanning electron microscope (SEM), X-ray diffraction (XRD), fluid bed agglomerator/coater, an instrument for measuring particle hardness and a bench-scale fixed bed reactor, coupled with a micro-GC, for testing high-temperature reactions.
The Environmental Technologies Department has a licence for AspenTech's University Package for Process Engineering, which offers an integrated suite of software for research and educational purposes.
This set of software allows the modelling and simulation of industrial plants and chemical processes, covering areas ranging from equipment design to energy and mass balances, steady-state and dynamic process simulation, process optimization and economics evaluation, among others.
In our department we work on a range of research topics including chemical processes for mineral industry, CO2 capture, hydrogen production, development of environment-friendly solutions for industry and evaluation of innovative energy-efficient concepts.
In all those areas, simulation tools can provide robust, fast, low cost and low risk, reliable calculations that help us to:
- Evaluate the viability of processes (energy and economy wise)
- Optimize process configurations
- Develop innovative alternatives
We are open to discuss the most suitable application for your Master Thesis, among the several topics we work with.
Background: Chemical engineering, industrial engineering, chemistry, basic to advance previous knowledge on Aspen or Aspen Hysys software (recommendable), programming skills (positive).
Contact: Julien Meyer and Luca Di Felice.
Project proposal 4: Development of multi-functional soil amendments based on mafic minerals for GHG emissions mitigation in agriculture.
Greenhouse gas emissions mitigation, crop-soil’s long term productivity, widening of resources and improving products at fertilizer producing companies, optimized use of available natural resources and environmentally friendly management of tailings from mining industry are some of the present challenges regarding environment and sustainability.
At IFE, we identify synergies between those topics, and this Master Thesis project will be focused on the experimental exploration of integrated solutions.
Based on the knowledge obtained on soils amendments and GHG emissions reduction, we will evaluate the potential of innovative alternatives to achieve positive global effects towards agriculture sustainability and climate change mitigation.
Task 1. State of the art review
Task 2. Exploratory experiments and characterization
(The evaluation of the material’s impact on soils will be tackled later on, in different research activities comprised in the wider Research Project, where this Master Thesis is framed).
Objectives: Perform an experimental study on advance products preparation and identify opportunities and technical limitations
Suitable background: Chemistry, chemical engineering, materials science.
Contacts: Julien Meyer and Luca Di Felice.
Project proposal 5: Chemical interaction of CO2-rich fluids with pre-existing fractures in cap rocks.
The project will be in collaboration with UiO and possibly NGI.
Project proposal 6 A and B: Developments of new numerical codes and experimental setups for coupled deformation, reaction and flow in tight rocks.
Observation from nature and experiments show that periodic, focused and fast flow of fluids frequently occurs through seemingly impermeable rocks. Understanding what governs such phenomena is crucial for understanding geological processes such extraction of magma from the mantle, metamorphic dehydration, expulsion of hydrocarbons from source rocks, but also for activities with economic, social and climate implications such as mining of deep geothermal energy, safe long-term underground storage of CO2 and venting of climate gases such as methane from the ground.
The main objective of the project is to derived constraints for the conditions under which tight rocks become permeable and allow for discharge of fluids. The work in project A mainly consist of further development, testing and running numerical codes on fluid flow through a reacting and deforming porous matrix. Project B consists of designing and carrying out experiments in a transparent cell using analogue materials. Analogue systems allow carrying out experiments on processes that in nature occur on time and length scales outside the laboratory scale. These experiments are complementary to the theoretical models and may be used to benchmark the new codes.
Project 6A could be carried out in collaboration with UiB or UiO, project 6B will be co-supervised by UiO. Project 6A includes travel to UNIL (Lausanne, Switzerland) to attend a short course on the method.
Contact: Viktoriya Yarushina.
Rocks that are buried at depth and experience changes in pressure and temperature conditions undergo metamorphic phase changes that alter their physical properties. The property that controls isostatic subsidence and uplift in sedimentary basins is density. Density may change dramatically as a consequence of metamorphism, especially in crustal rocks.
The aim of project 7 is to develop simple, mass conservative 1-D basin models including reactions in the crust and compare the resulting subsidence curves for some end-member scenarios with those without phase changes. Of particular interest is the difference in thermal maturation of hydrocarbons predicted with the different models.
Project 7 is in collaboration with UiO or UiB.
Contact: Viktoriya Yarushina.
Hydrocarbons are generated in tight rocks. Fluid expulsion from these rocks would require very high fluid pressures if the expulsion is by means of Darcy flow. Such high fluid pressures are not likely, because the pressure build-up will be limited by hydraulic fracturing. Hydraulic fracturing is simply the failure of the rock by means of a large pressure of the pore fluid.
This project looks at a cellular automaton model for hydraulic-fracturing and how it can be applied to hydrocarbon expulsion from source rocks. The first part of the master project is to re-implement the cellular automaton model suggested by Miller and Nur (2000), and to reproduce the model behaviour demonstrated Miller and Nur (2000) in terms of permeability evolution, self-organisation and critical states.
The second step is to couple the model to hydrocarbon generation and apply it to the expulsion of hydrocarbons from a source rocks. The aim of the work is the study the expulsion efficiency and timing – how much of the generated petroleum is expelled, and when the expulsion takes place. Applications may be expulsion in heating experiments from the laboratory or expulsion from source rocks going through geological temperature histories.
The master project is appropriate for students with a background in physics, mathematics, mathematical earth sciences, numerical computation or mechanics.
Contacts: Magnus Wangen and Viktoriya Yarushina.
Reference: Stephen A. Miller and Amos Nur, 2000, Permeability as a toggle switch in fluid-controlled crustal processes, Earth and Planetary Science Letters, vol. 183, pp. 133-146.
Hydraulic fracturing is often used by petroleum industry to increase oil and gas production. It is especially important for unconventional reservoirs, such as tight gas sands, shales coalbed methane. During hydraulic fracturing large amounts of fluid are injected at high pressure into the reservoir rock in order to expand naturally existing fracture networks or create new fractures. The process is optimized if all of the pumped fluid generates fractures. However, in reality some fluid leaks off into the formation through porous flow, thus reducing the generated fracture volume and subsequent hydrocarbon production. Accurate prediction of the lost fluid volume is important for design of the hydraulic fracturing and interpretation of the engineering parameters during treatment.
The master project will involve analytical and numerical modelling of the fluid loss from hydraulic fracture. Modelling results will be compared with the field data. The successful candidate for master project must be familiar with at least one of the following disciplines: basics of 2-phase mechanics, solid mechanics or geomechanics, and numerical modeling.
For more details, please contact Viktoriya Yarushina (viktoriya.yarushina (at) ife.no).