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Downstream de-bottlenecking of the Naphta Reformer at the oil refinery of PetroPlus, Antwerp

Chang, T. (author), Huijser, J.M. (author), Maassen, N. (author), De Winter, A. (author)

Document(en) uit de collectie Chemische Procestechnologie

report 2002

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A catalysis-engineering approach to selective hydrogenation

Zieverink, M.M.P. (author)

Abstract not available

doctoral thesis 2007

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Chemoenzymatic cascade processes for sustainable organic synthesis

Simons, C. (author)

Chemical production processes often require wasteful and expensive isolation as well as purification of intermediates. Catalytic cascades offer a unique opportunity to eliminate these inefficient and polluting steps, in particular when carefully orchestrated, involving enzymes and chemocatalysts. This thesis describes our efforts towards a...

doctoral thesis 2007

document

Positron depth profiling of the structural and electronic structure transformations of hydrogenated Mg-based thin films

Eijt, S.W.H. (author), Kind, R. (author), Singh, S. (author), Schut, H. (author), Legerstee, W.J. (author), Hendrikx, R.W.A. (author), Svetchnikov, V.L. (author), Westerwaal, R.J. (author), Dam, B. (author)

We report positron depth-profiling studies on the hydrogen sorption behavior and phase evolution of Mg-based thin films. We show that the main changes in the depth profiles resulting from the hydrogenation to the respective metal hydrides are related to a clear broadening in the observed electron momentum densities in both Mg and Mg2Ni films....

journal article 2009

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On the surface roughness development of hydrogenated amorphous silicon deposited at low growth rates

Wank, M.A. (author), Van Swaaij, R.A.C.M.M. (author), Van de Sanden, M.C.M. (author)

The surface roughness evolution of hydrogenated amorphous silicon (a-Si:H) films has been studied using in situ spectroscopic ellipsometry for a temperature range of 150–400?°C. The effect of external rf substrate biasing on the coalescence phase is discussed and a removal/densification of a hydrogen-rich layer is suggested to explain the...

journal article 2009

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Divacancies and the hydrogenation of Mg-Ti films with short range chemical order

Leegwater, H. (author), Schut, H. (author), Egger, W. (author), Baldi, A. (author), Dam, B. (author), Eijt, S.W.H. (author)

We obtained evidence for the partial chemical segregation of as-deposited and hydrogenated Mg1?yTiy films (0 ? y ? 0.30) into nanoscale Ti and Mg domains using positron Doppler-broadening. We exclusively monitor the hydrogenation of Mg domains, owing to the large difference in positron affinity for Mg and Ti. The electron momentum distribution...

journal article 2010

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Testing facility for hydrogen storage materials designed to simulate application based conditions

Westerwaal, R.J. (author), Nyqvist, R.G. (author), Haije, W.G. (author)

For the daily use of hydrogen storage materials, not only their intrinsic storage properties are important, but also equally important is the performance under practical conditions. Besides the techniques already available for the fundamental characterization of storage materials, there is a growing need to test storage materials under...

journal article 2011

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Micro-fabricated channel with ultra-thin yet ultra-strong windows enables electron microscopy under 4-bar pressure

Alan, T. (author), Yokosawa, T. (author), Gaspar, J. (author), Pandraud, G. (author), Paul, O. (author), Creemer, F. (author), Sarro, P.M. (author), Zandbergen, H.W. (author)

Transmission electron microscopy (TEM) of (de-)hydrogenation reactions is crucial to characterize efficiency of hydrogen storage materials. The nanoreactor, a micromachined channel with 15-nm-thick windows, effectively confines the gas flow to an electron-transparent chamber during TEM of reactions. Realistic experiments require very high...

journal article 2012

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Pt/Al2O3 Catalyzed 1,3-Propanediol Formation from Glycerol using Tungsten Additives

Ten Dam, J. (author), Djanashvili, K. (author), Kapteijn, F. (author), Hanefeld, U. (author)

Screening of four commercial catalysts (Pt/Al2O3, Pt/SiO2, Pd/Al2O3, and Pd/SiO2) and four acidic additives (hydrochloric, tungstic, phosphotungstic, and silicotungstic acids) shows that the combination of a platinum hydrogenation catalyst with tungsten containing acidic additives yields 1,3-propanediol from aqueous glycerol. The performance of...

journal article 2012

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Hydrogen termination of CVD diamond films by high-temperature annealing at atmospheric pressure

Seshan, V. (author), Ullien, D. (author), Castellanos-Gomez, A. (author), Sachdeva, S. (author), Murthy, D.H.K. (author), Savenije, T.J. (author), Ahmad, H.A. (author), Nunney, T.S. (author), Janssens, S.D. (author), Haenen, K. (author), Nesládek, M. (author), Van der Zant, H.S.J. (author), Sudhölter, E.J.R. (author), De Smet, L.C.P.M. (author)

A high-temperature procedure to hydrogenate diamond films using molecular hydrogen at atmospheric pressure was explored. Undoped and doped chemical vapour deposited (CVD) polycrystalline diamond films were treated according to our annealing method using a H2 gas flow down to ?50 ml/min (STP) at ?850?°C. The films were extensively evaluated by...

journal article 2013

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Metal–Organic Framework Mediated Cobalt/Nitrogen-Doped Carbon Hybrids as Efficient and Chemoselective Catalysts for the Hydrogenation of Nitroarenes

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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Biocatalytic Reduction Reactions from a Chemist's Perspective

Hollmann, F. (author), Opperman, Diederik J. (author), Paul, C.E. (author)

Reductions play a key role in organic synthesis, producing chiral products with new functionalities. Enzymes can catalyse such reactions with exquisite stereo-, regio- and chemoselectivity, leading the way to alternative shorter classical synthetic routes towards not only high-added-value compounds but also bulk chemicals. In this review we...

review 2020

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PEM Electrolysis-Assisted Catalysis Combined with Photocatalytic Oxidation towards Complete Abatement of Nitrogen-Containing Contaminants in Water

Ampurdanés, Jordi (author), Bunea, S. (author), Urakawa, A. (author)

Electrolysis-assisted nitrate (NO₃⁻) reduction is a promising approach for its conversion to harmless N₂ from waste, ground, and drinking water due to the possible process simplicity by in-situ generation of H₂/H/H⁺ by water electrolysis and to the flexibility given by tunable redox...

journal article 2020

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Passivation Enhancement of Poly-Si Carrier-Selective Contacts by Applying ALD Al_2O_3 Capping Layers

Yang, G. (author), Van de Loo, Bas (author), Stodolny, Maciej (author), Limodio, G. (author), Melskens, Jimmy (author), Isabella, O. (author), Weeber, A.W. (author), Zeman, M. (author), Kessels, W. M.M. (author)

Hydrogenation of polycrystalline silicon (poly-Si) passivating contacts is crucial for maximizing their passivation performance. This work presents the application of Al2O3 prepared by atomic layer deposition as a hydrogenating capping layer. Several important questions related to this application of Al2O3 are addressed by comparing results...

journal article 2021

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Hydrogenation Kinetics of Metal Hydride Catalytic Layers

Bannenberg, L.J. (author), Boshuizen, B. (author), Nugroho, Ferry Anggoro Ardy (author), Schreuders, H. (author)

Catalyzing capping layers on metal hydrides are employed to enhance the hydrogenation kinetics of metal hydride-based systems such as hydrogen sensors. Here, we use a novel experimental method to study the hydrogenation kinetics of catalyzing capping layers composed of several alloys of Pd and Au as well as Pt, Ni, and Ru, all with and without...

journal article 2021

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E. coli Nickel-Iron Hydrogenase 1 Catalyses Non-native Reduction of Flavins: Demonstration for Alkene Hydrogenation by Old Yellow Enzyme Ene-reductases**

Joseph Srinivasan, Shiny (author), Cleary, Sarah E. (author), Ramirez, Miguel A. (author), Reeve, Holly A. (author), Paul, C.E. (author), Vincent, Kylie A. (author)

A new activity for the [NiFe] uptake hydrogenase 1 of Escherichia coli (Hyd1) is presented. Direct reduction of biological flavin cofactors FMN and FAD is achieved using H₂ as a simple, completely atom-economical reductant. The robust nature of Hyd1 is exploited for flavin reduction across a broad range of temperatures (25–70 °C)...

journal article 2021

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Hydrogenated Boron Phosphide with the excellent tunability of electronic properties and Current-Voltage responses

Tan, C. (author), Zhou, Quan (author), Liu, X. (author), Zhang, Kouchi (author), Ye, H. (author), Wu, Qibao (author)

Combining the first principles calculations and the non-equilibrium Green’s function formalisms, we decipher the structural, electronic, and transport properties of boron phosphide (BP) with hydrogenation. Hydrogenated BP monolayer is an indirect semiconductor with a wide-bandgap of 3.76 eV that is favorable in power devices. We find that the...

journal article 2022

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Efficient Promoters and Reaction Paths in the CO₂Hydrogenation to Light Olefins over Zirconia-Supported Iron Catalysts

Barrios, Alan J. (author), Peron, Deizi V. (author), Chakkingal, Anoop (author), Dugulan, A.I. (author), Moldovan, Simona (author), Nakouri, Kalthoum (author), Thuriot-Roukos, Joëlle (author), Wojcieszak, Robert (author), Thybaut, Joris W. (author)

Hydrogenation into light olefins is an attractive strategy for CO₂fixation into chemicals. In this article, high throughput experimentation and extended characterization were employed to identify the most efficient promoters and to elucidate structure-performance correlations and reaction paths in the CO₂hydrogenation to...

journal article 2022

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CO2 hydrogenation to methanol over Cd4/TiO2 catalyst: Insight into multifunctional interface

Li, G. (author), Meeprasert, J. (author), Wang, J. (author), Li, C. (author), Pidko, E.A. (author)

Supported metal catalysts have shown to be efficient for CO ₂ conversion due to their multifunctionality and high stability. Herein, we have combined density functional theory calculations with microkinetic modeling to investigate the catalytic reaction mechanisms of CO ₂ hydrogenation to CH ₃OH over a...

journal article 2022

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Automation and Microfluidics for the Efficient, Fast, and Focused Reaction Development of Asymmetric Hydrogenation Catalysis

van Putten, R. (author), Eyke, Natalie S. (author), Baumgartner, L.M. (author), Schultz, Victor L. (author), Filonenko, G.A. (author), Jensen, Klavs F. (author), Pidko, E.A. (author)

Automation and microfluidic tools potentially enable efficient, fast, and focused reaction development of complex chemistries, while minimizing resource- and material consumption. The introduction of automation-assisted workflows will contribute to the more sustainable development and scale-up of new and improved catalytic technologies....

journal article 2022