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van Koppen, L.M. (author), Dugulan, A.I. (author), Hensen, Emiel J.M. (author), Bezemer, G. Leendert (author)Cobalt oxidation is a relevant deactivation pathway of titania-supported cobalt catalysts used in Fischer-Tropsch synthesis (FTS). To work towards more stable catalysts, we studied the effect of the surface area of the titania support and noble metal promotion on cobalt oxidation under simulated high conversion conditions. Mössbauer...journal article 2024
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Mues genannt Koers, L. (author), McNeil, S. W. (author), Radchenko, V. (author), Paulssen, E. (author), Hoehr, C. (author)We present the production of <sup>58m</sup>Co on a small, 13 MeV medical cyclotron utilizing a siphon style liquid target system. Different concentrated iron(III)-nitrate solutions of natural isotopic distribution were irradiated at varying initial pressures and subsequently separated by solid phase extraction chromatography. The radio cobalt...journal article 2023
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van Koppen, L.M. (author), Dugulan, A.I. (author), Leendert Bezemer, G. (author), Hensen, Emiel J.M. (author)The study of titania-supported cobalt nanoparticles is relevant for industrial Fischer-Tropsch synthesis (FTS). Herein, we report about various deactivation pathways of cobalt supported on P25 titania (cobalt loading 2–8 wt%) under simulated high conversion conditions using in situ Mössbauer spectroscopy. A fraction of metallic cobalt was...journal article 2023
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van Koppen, L.M. (author), Dugulan, A.I. (author), Leendert Bezemer, G. (author), Hensen, Emiel J.M. (author)Understanding the deactivation mechanism of cobalt-based Fischer-Tropsch catalysts is of significant practical importance. Herein, we explored the role of manganese as a structural promoter on silica-supported cobalt nanoparticles under simulated high CO conversion conditions, i.e., high relative humidity. The structural changes in cobalt...journal article 2023
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Chi, Lin (author), Li, Mengxuan (author), Zhang, Qianrui (author), Liang, X. (author), Huang, Chendong (author), Peng, Bin (author), Sun, Haisheng (author)Cementitious materials are well acknowledged as one of the most adaptable materials for immobilizing heavy metals. Belite calcium sulfoaluminate cement (BCSA), one of the low-carbon alternative binders to cement with superior properties regarding chemical resistance and mechanical properties, is found with a desirable capability for waste...journal article 2023
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Kavun, Vitalii (author), Uslamin, E. (author), van der Linden, B. (author), Canossa, Stefano (author), Goryachev, A. (author), Bos, Emma E. (author), Garcia Santaclara, J. (author), Smolentsev, Grigory (author), Repo, Eveliina (author), van der Veen, M.A. (author)Titanium-based metal-organic framework, NH2-MIL-125(Ti), has been widely investigated for photocatalytic applications but has low activity in the hydrogen evolution reaction (HER). In this work, we show a one-step low-cost postmodification of NH2-MIL-125(Ti) via impregnation of Co(NO3)2. The resulting Co@NH2-MIL-125(Ti) with embedded single...journal article 2023
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Elbing, Raphael (author)The growing world population gaining affluence is driving the extraction of raw materials. Resource availability is finite and concerns about future supply shortages rise. An approach to tackle this problem is circular economy which entails multiple strategies to reduce the demand of virgin materials. The implementation of those strategies...master thesis 2022
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van Koppen, L.M. (author), Dugulan, A.I. (author), Hensen, Emiel J.M. (author), Bezemer, G. Leendert (author)The commercial application of cobalt-based Fischer-Tropsch synthesis (FTS) suffers from catalyst deactivation. One of the main deactivation mechanisms under industrial conditions is sintering. In this work, we explored the role of manganese oxide as a structural promoter against sintering in a carbon nanofiber supported cobalt model catalyst....journal article 2022
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van der Meide, Marc (author), Harpprecht, Carina (author), Northey, Stephen (author), Yang, Y. (author), Steubing, Bernhard (author)Cobalt is considered a key metal in the energy transition, and demand is expected to increase substantially by 2050. This demand is for an important part because of cobalt use in (electric vehicle) batteries. This study investigated the environmental impacts of the production of cobalt and how these could change in the future. We modeled...journal article 2022
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Gonugunta, P. (author), Dugulan, A.I. (author), Bezemer, G. Leendert (author), Brück, E.H. (author)Operando spectroscopic techniques (Diffusive Reflective Infrared Fourier-Transform and Mössbauer emission spectroscopy) were combined to investigate the role of oxygenates deposition on deactivation of cobalt on titania Fischer-Tropsch catalysts at high pressure. Clear formation of carboxylates was seen for catalysts prepared via both...journal article 2021
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van der Linden, Erika (author)The transition to a low-carbon economy depends on several critical materials, among which is cobalt. This metal is a main component in batteries, and therefore, demand for cobalt is expected to increase in the coming years. This paper explores future scenarios for the cobalt system, in light of its role in the low-carbon transition. The future...master thesis 2020
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Ronda-Lloret, Maria (author), Marakatti, Vijaykumar S. (author), Sloof, W.G. (author), Delgado, Juan José (author), Sepúlveda-Escribano, Antonio (author), Ramos-Fernandez, Enrique V. (author), Rothenberg, Gadi (author), Shiju, N. Raveendran (author)MAX (M<sub>n+1</sub>AX<sub>n</sub>) phases are layered carbides or nitrides with a high thermal and mechanical bulk stability. Recently, it was shown that their surface structure can be modified to form a thin non-stoichiometric oxide layer, which can catalyze the oxidative dehydrogenation of butane. Here, the use of a Ti<sub>2</sub>AlC MAX...journal article 2020
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Elpenhof, Chris (author)Mining projects around the world face a significant challenge to reduce their footprint and be more environmentally friendly. Research has shown that mineral processing is of major influence, due to the use of heavy chemicals that are both expensive and polluting. Currently, electrowinning (the electrodeposition of metals) is only used in the...master thesis 2019
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Sajeev Kumar, Asvin (author)Steelmaking process is a highly carbon-intensive process. This is mainly due to the use of coke as a reducing agent in the blast furnaces to produce carbon-rich pig iron, which in turn, is used for the production of low-carbon steel in the basic oxygen furnaces. The exhaust gases from the blast and basic oxygen furnaces, which mainly contain CO...master thesis 2019
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Menicucci, A. (author), Malatesta, F. (author), Di Capua, Francesco (author), Campajola, Luigi (author), Casolaro, Pierluigi (author), Furano, Gianluca (author), Di Mascio, S. (author), Ottavi, Marco (author)The tolerance to the cumulative effects of ionizing radiation is one of the most important parameters to keep into account when selecting an EEE component for space applications. TID sensitivity is normally investigated measuring changes induced by gamma rays from 60Co sources to nominal parameters of a component or to its expected functional...conference paper 2018
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Kotnis, Joanna (author)Cobalt is one of the most important critical raw materials for emerging technologies. There are many incentives for analysis of this metal, from increasing demand for rechargeable batteries, rising prices and social issues involved. This paper is the first attempt to perform a substance flow analysis of cobalt at a city level. The analysis...master thesis 2018
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Tijsseling, Laurens (author)The metal cobalt is essential in creating a sustainable society, as it is an important component in lithium- ion batteries and wind energy turbines. About half of the Earth’s land-based cobalt reserves can be found in the Democratic Republic of Congo (DRC). This study focusses on characterising cobalt-bearing copper ore from a DRC based mining...master thesis 2017
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Sun, X. (author), Olivos Suarez, A.I. (author), Oar-Arteta Gonzalez, L. (author), Rozhko, E. (author), Osadchii, D. (author), Bavykina, A.V. (author), Kapteijn, F. (author), Gascon, Jorge (author)A Co@N-doped carbon (Co@ NC) hybrid was synthesized by thermal decomposition of the metal–organic framework (MOF) ZIF-67 under N2 atmosphere. These hybrid materials exhibit outstanding catalytic activity and chemoselectivity for the conversion of a wide range of substituted nitroarenes to their corresponding anilines under relatively mild...journal article 2017
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Sartipi, S. (author)Design and development of catalyst formulations that maximize the direct production of liquid fuels by combining Fischer-Tropsch synthesis (FTS), hydrocarbon cracking, and isomerization into one single catalyst particle (bifunctional FTS catalyst) have been investigated in this thesis. To achieve this aim, a second functionality (other than FTS)...doctoral thesis 2014
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Sartipi, S. (author), Alberts, M. (author), Santos, V.P. (author), Nasalevich, M. (author), Gascon, J. (author), Kapteijn, F. (author)Mesoporous H-ZSM-5 (mesoH-ZSM-5) was used as a carrier for a series of bifunctional Co-based catalysts for Fischer–Tropsch synthesis with ZrO2 and/or Ru added as promoters. The reducibility of the catalysts was studied in detail by using temperature-programmed reduction and X-ray absorption spectroscopy. A comparison of the catalytic performance...journal article 2013
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