Searched for: subject%3A%22catalyst%255C+deactivation%22
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Liu, C. (author), Uslamin, E. (author), Khramenkova, E. (author), Sireci, Enrico (author), Ouwehand, Lucas T.L.J. (author), Ganapathy, S. (author), Kapteijn, F. (author), Pidko, E.A. (author)
The production of valuable aromatics and the rapid catalyst deactivation due to coking are intimately related in the zeolite-catalyzed aromatization reactions. Here, we demonstrate that these two processes can be decoupled by promoting the Ga/HZSM-5 aromatization catalyst with Ca. The resulting bimetallic catalysts combine high selectivity to...
journal article 2022
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Franz, R.P.M. (author)
The abundance of methane has led to a strong interest to use methane as a feedstock in the chemical industry. One of the main challenges is the initial activation of the methane molecule. In this thesis, heterogeneous catalysts for two different methane conversion processes are investigated. Firstly, the deactivation of supported Ni catalysts...
doctoral thesis 2021
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Franz, R.P.M. (author), Pinto, D. (author), Uslamin, E. (author), Urakawa, A. (author), Pidko, E.A. (author)
Industrial-scale reforming of methane is typically carried out with an excess of oxidant to suppress coking of the catalyst. On the other hand, many academic studies on dry reforming employ a CO<sub>2</sub>/CH<sub>4</sub> ratio of unity to quickly observe coking which can be reduced by adding a catalyst promoter. In this work, Ni/Al<sub>2<...
journal article 2021
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Krieger, A.M. (author), Sinha, V. (author), Kalikadien, A.V. (author), Pidko, E.A. (author)
Reversible dissociation of H−X bond (M−L+H−X→M(X)-L(H); (Formula presented.)) is an important step during pre-activation, catalysis and possible deactivation of acid-base cooperative pincer based transition metal catalysts (M−L). Herein we carried out a high-throughput computational investigation of the thermodynamic stability of different...
journal article 2021
document
Franz, R.P.M. (author), Uslamin, E. (author), Pidko, E.A. (author)
The abundance of methane has led to a strong interest to use methane as a feedstock in the chemical industry. One of the main challenges is the initial activation of the methane molecule. This has resulted in the development of several different approaches to utilize methane, some more developed than others. In this work the current status of...
review 2021
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Franz, R.P.M. (author), Tichelaar, F.D. (author), Uslamin, E. (author), Pidko, E.A. (author)
Catalyst passivation refers to the formation of a protective oxide layer on the active metal particles that prevents their oxidation when exposed to air. Common passivation procedures, when applied to Ni/ Al2O3 catalysts, typically result in a significant decrease of the overall Ni surface area and, accordingly, the catalytic activity....
journal article 2021
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Kuliaev, P. (author), Pidko, E.A. (author)
Optimization and execution of chemical reactions are to a large extend based on experience and chemical intuition of a chemist. The chemical intuition is rooted in the phenomenological Le Chatelier's principle that teaches us how to shift equilibrium by manipulating the reaction conditions. To access the underlying thermodynamic parameters...
journal article 2019
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Liu, C. (author), van Putten, R. (author), Kulyaev, Pavel O. (author), Filonenko, G.A. (author), Pidko, E.A. (author)
The reaction mechanism of ester hydrogenation catalyzed by a bidentate aminophosphine ligated manganese catalyst was studied by DFT calculations. Particular emphasize was placed on the role of the alkoxide base additives. The presence of such basic promoters as KO<sup>t</sup>Bu can improve the catalyst activity by lowering the activation...
journal article 2018
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Sengar, A. (author), Van Santen, Rutger A. (author), Steur, E. (author), Kuipers, J.A.M. (author), Padding, J.T. (author)
journal article 2018
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Kosinov, Nikolay (author), Coumans, Ferdy J A G (author), Uslamin, Evgeny (author), Kapteijn, F. (author), Hensen, Emiel J M (author)
Non-oxidative methane dehydroaromatization is a promising reaction to directly convert natural gas into aromatic hydrocarbons and hydrogen. Commercialization of this technology is hampered by rapid catalyst deactivation because of coking. A novel approach is presented involving selective oxidation of coke during methane dehydroaromatization...
journal article 2016
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