The labs of the ICC group will be closed February and March 2020. Please consider this in your planning of a MSc project with us.
as of 14.10.2019 we can unfortunately not host any more MSc students. We hope we can again host MSc students in period 4. The calls below are open but projects can not start before period 4.
A project available in the OCC group (Prof. Pieter Bruijnincx):
Supervisor: Arjan Smit (PhD candidate OCC)
Short project description:
Process development for Fabiola lignin modification.
ECN.TNO has developed a mild fractionation process, FabiolaTM , which has a large potential for improving the cost-effective pretreatment of biomass. Fractionation of herbaceous biomass and hardwood resulted in high sugar yields from the (hemi)cellulose. The sugars can be converted to fuels and building blocks for amongst others plastics. The isolated lignin showed remarkable characteristics as compared to lignin obtained by other pretreatment processes. Lignin characterisation and its application as feedstock for aromatic polymers and monomers are currently being worked on. In addition to improved product yields and quality, the combination of solvent and process conditions holds potential for a significant reduction of operating cost and energy demand which further improves the economic viability of the process.
Crucial for the economic viability and market implementation of this process is the valorization of lignin to high value applications. The goal of this project is to develop a mild process for Fabiola lignin modification to produce tailored building blocks for high performance materials. The project involves the synthesis and use of heterogeneous catalysts for selective lignin conversion.
 Smit, Arjan, and Wouter Huijgen. “Effective fractionation of lignocellulose in herbaceous biomass and hardwood using a mild acetone organosolv process.” Green Chemistry 19.22 (2017): 5505-5514.
 de Haro, Juan Carlos, et al. “Bio-based polyurethane coatings with high biomass content: tailored properties by lignin selection.” ACS Sustainable Chemistry & Engineering (2019).
Supervisor: Koen Bossers and Maarten Jongkind
Short project description:
Imaging the Exchange of Internal and External Donors on Fluorescently Labelled Ziegler-Natta Catalysts
Ziegler-Natta catalysts are considered to be the grand old workhorses of the poly-olefin industry, where polyethylene and polypropylene are produced on the 180 million tonnes scale annually. Nowadays a typical Ziegler-Natta catalyst is based on a MgCl2 framework to which the pro-active site TiCl4 chemisorbs on specific unsaturated lattices such as the (110) and (104). These lattices can be stabilized by the presence of so-called internal (added during synthesis) and external (added during the polymerization reaction) donors, which additionally also change the stereochemistry and activity of the Ti active sites. These donors are typically Lewis base organic molecules such as di-ethers and di-esters for internal donors and alkoxysilanes for external donors. The external donor is typically added due to the trialkylaluminium co-catalyst removing the internal donors from the surface during the polymerization reaction.
In this work we propose to directly image the removal of internal donor as well as coordination of the external donor on the MgCl2 surface by using perylene-labelled di-ether, di-ester and alkoxysilane donor molecules as fluorescent tags. These donors will be either grafted onto a MgCl2 framework (internal donors) or added during the polymerization reaction and the exchange will be imaged ex-situ and in-situ by the master student with confocal fluorescence microscopy (CFM). Additional information will be obtained by ex-situ Raman microscopy, IR microscopy, SEM-EDX and polymer analysis (GPC, 13C-NMR) to analyse the polymer properties obtained (isotacticity, molecular weight distribution). If time allows it, the student will also work closely with the supervising PhD on developing a MgCl2 single crystal model system for the same research that has spatially resolved (110) and (104) lattices. [1,2]
 J.R. Severn and J.C. Chadwick (Eds.), Tailor-Made Polymers; Wiley-VCH: Weinheim, Germany, 2008
 Guzeev, B.A., Mladentsev, D.Y., Sharikov, M.I., Goryunov, G.P., Uborsky, D.V., Voskoboynikov, A.Z., Synthesis, 2019, 51, 1399-1407
Supervisor: Francesco Mattarozzi
Short project description:
Carbon dioxide emission, from fossil fuel utilisation, is considered a significant threat to global economy and sustainability.
Hence the share of renewable energy sources, such as solar and wind, in our energy supply is increasing rapidly. However, the use of renewable energy at a large scale is challenging, considering the intermittent nature and lack of efficient large-scale electricity storage.
Converting CO2 to useful fuels or chemicals leads to utilization of one of the major greenhouse gases as a carbon feedstock, but the activation of this extremely stable molecule is a challenging task. Electrochemical conversion of carbon dioxide represents one of the most promising strategies.
The goal is to achieve an efficient CO2 electrochemical conversion to CO and H2 (“syngas”) to be further used to produce more valuable products. The novel science is to develop suitable catalysts based on Ag nanoparticles deposited on carbon electrodes and to understand and optimise the interplay between catalyst, electrolyte and support.
The aim is to obtain a better understanding of how the activity, selectivity and stability of the electrocatalyst can be controlled. This includes not only controlled nanomorphology and composition of the metal catalyst, but also specifically tuning the porosity and the surface properties of the conducting carbon (or other) support, which can dictate local pH (buffering) and influence selectivity.
For more information, click on the link: https://www.eye-openers.nl/nl/meetthecrew/francesco-mattarozzi/