Searched for: subject%3A%22heterogeneous%255C%2Bcatalysis%22
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Pinto, D. (author), Minorello, S. (author), Zhou, Zhouping (author), Urakawa, A. (author)
Carbon dioxide capture and reduction (CCR) process emerges as an efficient catalytic strategy for CO<sub>2</sub> capture and conversion to valuable chemicals. K-promoted Cu/Al<sub>2</sub>O<sub>3</sub> catalysts exhibited promising CO<sub>2</sub> capture efficiency and highly selective conversion to syngas (CO + H<sub>2</sub>). The dynamic...
journal article 2024
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Weber, J.M. (author), Lapkin, Alexei A. (author)
Designing a simple, yet representative reaction network for subsequent micro-kinetic analysis is important for limiting the cost of evaluation and ensuring model solvability. This is currently achieved by employing sensitivity analysis over a comprehensive reaction network (CRN) to screen reaction species. However, as a reaction network is...
journal article 2023
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Hu, L. (author), Pinto, D. (author), Urakawa, A. (author)
Direct valorization of methane via oxidative coupling of methane (OCM) is an encouraging alternative to conventional oil-based processes for the production of light hydrocarbons (ethane and ethylene). Abundant, inexpensive simple oxides such as MgO and La<sub>2</sub>O<sub>3</sub> possess the ability to selectively activate methane. However,...
journal article 2023
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Pinto, D. (author), Hu, L. (author), Urakawa, A. (author)
Dynamic coke-mediated dry reforming of methane (DC-DRM) is an unsteady-state strategy to overcome the limitations of co-feed operation, including the fast deactivation of the catalysts and the loss of valuable H<sub>2</sub> in the reverse water gas-shift reaction. This paper proves the feasibility of DC-DRM on Ni-based catalytic systems,...
journal article 2023
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Zhao, Guofeng (author), Moulijn, J.A. (author), Kapteijn, F. (author), Dautzenberg, Frits M. (author), Xu, Bin (author), Lu, Yong (author)
Heterogeneous catalysis plays a pivotal role in the current chemical and energy vectors production. Notably, to fully utilize the intrinsic activity and selectivity of a catalyst, the chemical reactor has to be designed and operated optimally to achieve enhanced heat/mass transfer, well-defined contact time of reactants, uniform flow pattern,...
journal article 2023
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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), 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), 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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de Dios García, Ignacio (author), Stankiewicz, A.I. (author), Nigar, H. (author)
Energy-efficient CH4-CO2 valorization to fuels and chemicals presents an urgent need considering the great variety of methane sources and the removal of greenhouse gases. In the present work, the microwave-assisted dry reforming of methane, DRM, has been carried out in a custom-designed rectangular mono-mode microwave applicator over several...
journal article 2021
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Docherty, S.R. (author), Phongprueksathat, N. (author), Lam, Erwin (author), Noh, Gina (author), Safonova, Olga V. (author), Urakawa, A. (author), Copéret, Christophe (author)
The direct conversion of CO<sub>2</sub>to CH<sub>3</sub>OH represents an appealing strategy for the mitigation of anthropogenic CO<sub>2</sub>emissions. Here, we report that small, narrowly distributed alloyed PdGa nanoparticles, prepared via surface organometallic chemistry from silica-supported Ga<sup>III</sup>isolated sites, selectively...
journal article 2021
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Martinez Gonzalez, A. (author), Stankiewicz, A.I. (author), Nigar, H. (author)
Traveling-Wave Microwave Reactor (TMR) presents a novel heterogeneous catalytic reactor concept based on a coaxial waveguide structure. In the current paper, both modeling and experimental studies of catalyst heating in the TMR are presented. The developed 3D multiphysics model was validated from the electromagnetic and heat transfer points of...
journal article 2021
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Coeck, R. (author), Meeprasert, J. (author), Li, G. (author), Altantzis, T. (author), Bals, S. (author), Pidko, E.A. (author), De Vos, D. (author)
The reductive amination of benzoic acid and its derivatives would be an effective addition to current synthesis methods for benzylamine. However, with current technology it is very difficult to keep the aromaticity intact when starting from benzoic acid, and salt wastes are often generated in the process. Here, we report a heterogeneous...
journal article 2021
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Yan, P. (author), Stankiewicz, A.I. (author), Eghbal Sarabi, F. (author), Nigar, H. (author)
Microwave irradiation can intensify catalytic chemistry by selective and controlled microwave-catalytic packed-bed interaction. However, turning it to reality from laboratory to practical applications is hindered by challenges in the reactor design and scale-up. Here, we present a novel, rectangular traveling-wave microwave reactor (RTMR) and...
journal article 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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Sengar, A. (author), Kuipers, J. A.M. (author), van Santen, R. A. (author), Padding, J.T. (author)
Particle based approaches are one of the recent modeling techniques to overcome the computational limitation in multiscale modeling of complex processes, for example a heterogeneous catalytic reactor. We propose an efficient model for a chemical reactor where hydrodynamics of the solvent is determined by Stochastic Rotation Dynamics and a...
journal article 2019
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Li, G. (author), Vollmer, I. (author), Liu, C. (author), Gascon, Jorge (author), Pidko, E.A. (author)
Mo/ZSM-5 is one of the most studied and efficient catalysts for the dehydroaromatization of methane (MDA), but the mechanism of its operation remains controversial. Here, we combine an ab initio thermodynamic analysis with a comprehensive mechanistic density functional theory study to address Mo-speciation in the zeolite and identify the...
journal article 2019
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Corral-Pérez, Juan José (author), Billings, Amelia (author), Stoian, Dragos (author), Urakawa, A. (author)
Continuous synthesis of formic acid and methyl formate via CO<sub>2</sub> hydrogenation is demonstrated using a molecular iridium complex stably immobilized on a solid covalent triazine framework (CTF) under high-pressure conditions. Compared to formic acid synthesis, methyl formate synthesis is advantageous to enhance the selectivity and...
journal article 2019
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Barreiro, Elena M. (author), Hao, Zhimian (author), Adrio, Luis A. (author), van Ommen, J.R. (author), Hellgardt, Klaus (author), Hii, King Kuok (author)
Catalyst leaching is a major impediment to the development of commercially-viable processes conducted in a liquid-phase. To date, there is no reliable technique that can accurately identify the extent and dynamics of the leaching process in a quantitative manner. In this work, a tandem flow-reactor system has been developed, which allowed us...
journal article 2018
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Li, G. (author), Pidko, E.A. (author)
Zeolites have a broad spectrum of applications as robust microporous catalysts for various chemical transformations. The reactivity of zeolite catalysts can be tailored by introducing heteroatoms either into the framework or at the extraframework positions that gives rise to the formation of versatile Brønsted acid, Lewis acid and redox...
journal article 2018
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Galnares de la Garza, F.O. (author)
This paper presents the mathematical modelling and design of a flat plate photoreactor with a fixed film photocatalyst to degrade phenol. Phenol was used as target pollutant as it is one of the most studied contaminants in photocatalysis and it is present in many of the wastewater streams containing pesticides, drugs, and dyes which cannot be...
student report 2016
Searched for: subject%3A%22heterogeneous%255C%2Bcatalysis%22
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