| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Faria, Jimmy
University of Twente
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2022Elasto-Raman scattering: Arsenic optical phonon as a probe of nematicity in Ba Fe 2 As 2citations
- 2022Enhanced catalytic activity and stability of nanoshaped Ni/CeO2 for CO2 methanation in micro-monolithscitations
- 2018Interplay of support chemistry and reaction conditions on copper catalyzed methanol steam reformingcitations
Places of action
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article
Enhanced catalytic activity and stability of nanoshaped Ni/CeO2 for CO2 methanation in micro-monoliths
Abstract
<p>Coupling inherently fluctuating renewable feedstocks to highly exothermic catalytic processes, such as CO<sub>2</sub> methanation, is a major challenge as large thermal swings occurring during ON- and OFF- cycles can irreversible deactivate the catalyst via metal sintering and pore collapsing. Here, we report a highly stable and active Ni catalyst supported on CeO<sub>2</sub> nanorods that can outperform the commercial CeO<sub>2</sub> (octahedral) counterpart during CO<sub>2</sub> methanation at variable reaction conditions in both powdered and μ-monolith configurations. The long-term stability tests were carried out in the kinetic regime, at the temperature of maximal rate (300 °C) using fluctuating gas hourly space velocities that varied between 6 and 30 L h<sup>−1</sup>·g<sub>cat</sub><sup>−1</sup>. Detailed catalyst characterization by μ-XRF revealed that similar Ni loadings were achieved on nanorods and octahedral CeO<sub>2</sub> (c.a. 2.7 and 3.3 wt. %, respectively). Notably, XRD, SEM, and HR-TEM-EDX analysis indicated that on CeO<sub>2</sub> nanorods smaller Ni-Clusters with a narrow particle size distribution were obtained (∼ 7 ± 4 nm) when compared to octahedral CeO<sub>2</sub> (∼ 16 ± 13 nm). The fast deactivation observed on Ni loaded on commercial CeO<sub>2</sub> (octahedral) was prevented by structuring the reactor bed on μ-monoliths and supporting the Ni catalyst on CeO<sub>2</sub> nanorods. FeCrAlloy® sheets were used to manufacture a multichannel μ-monolith of 2 cm in length and 1.58 cm in diameter, with a cell density of 2004 cpsi. Detailed catalyst testing revealed that powdered and structured Ni/CeO<sub>2</sub> nanorods achieved the highest reaction rates, c.a. 5.5 and 6.2 mmol CO<sub>2</sub> min<sup>−1</sup>·g<sub>Ni</sub><sup>−1</sup> at 30 L h<sup>−1</sup>·g<sub>cat</sub><sup>−1</sup> and 300 °C, respectively, with negligible deactivation even after 90 h of fluctuating operation.</p>