Accès ouvert
2026
article
OpenAlex
Ellen Järvinen, Francesco Sandri, Jorge Velasco, Joakim Kattelus et autres
ABSTRACT Unlike temperature‐programmed desorption (TPD) of ammonia (NH 3 ‐TPD) and Fourier‐transform infrared spectroscopy of adsorbed pyridine (pyridine‐FTIR), where ammonia and pyridine adsorb and desorb without reaction, TPD of isopropylamine (IPAm‐TPD) relies on a Brønsted‐acid‐catalyzed decomposition of isopropylamine to propylene and ammonia …
fi
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Accès ouvert
2026
preprint
OpenAlex
Ellen Järvinen, Francesco Sandri, Jorge Velasco, Joakim Kattelus et autres
Unlike temperature-programmed desorption (TPD) of ammonia (NH 3 -TPD) and Fourier-transform infrared spectroscopy of adsorbed pyridine (pyridine-FTIR), where ammonia and pyridine adsorb and desorb without reaction, TPD of isopropylamine (IPAm-TPD) relies on a Brønsted-acid-catalyzed decomposition of isopropylamine to propylene and ammonia to …
fi
(code pays fourni par la source)
Accès ouvert
2026
preprint
OpenAlex
Ellen Järvinen, Francesco Sandri, Jorge Velasco, Joakim Kattelus et autres
Unlike temperature-programmed desorption (TPD) of ammonia (NH 3 -TPD) and Fourier-transform infrared spectroscopy of adsorbed pyridine (pyridine-FTIR), where ammonia and pyridine adsorb and desorb without reaction, TPD of isopropylamine (IPAm-TPD) relies on a Brønsted-acid-catalyzed decomposition of isopropylamine to propylene and ammonia to …
fi
(code pays fourni par la source)
Accès ouvert
2025
article
OpenAlex
Joakim Kattelus, Emma Verkama, Jorge Velasco, Reetta Karinen et autres
The mechanism of hydrodenitrogenation (HDN) of aliphatic primary amines, which are intermediates during HDN of renewable feedstocks, was investigated. The reactions of methylamine, ethylamine and dimethylamine on Pt(111) were studied using density functional theory (DFT). The hydrogen-deficient amine species predicted by DFT …
fi
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Accès ouvert
2025
article
OpenAlex
Parminder Kaur, Jiaqi Wang, Xiang Li, Reetta Karinen et autres
Lignin, an abundant biopolymer within the biosphere, represents a promising renewable source of organic chemicals and fuels. Within the framework of a sustainable biorefinery, efficient lignin valorization plays a pivotal role in enhancing the economic feasibility of a holistic biomass transformation. Electrocatalytic …
fi, it, be
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Accès ouvert
2025
erratum
OpenAlex
Ellen Järvinen, Jorge Velasco, Reetta Karinen, Riikka L. Puurunen
0 2 5 -0 2 1 1 2 -0 In the first publication, Figs. 2, 3 and 4 appeared incorrectly with degree signs missing and have now been corrected.For completeness and transparency, the correct versions and the old incorrect versions are displayed …
fi
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Accès ouvert
2025
preprint
OpenAlex
Joakim Kattelus, Emma Verkama, Jorge Velasco, Reetta Karinen et autres
The mechanism of hydrodenitrogenation (HDN) of aliphatic primary amines, which are intermediates during HDN of renewable feedstocks, was investigated. The reactions of methylamine, ethylamine and dimethylamine on Pt(111) were studied using density functional theory (DFT). The hydrogen-deficient amine species predicted by DFT …
fi
(code pays fourni par la source)
Accès ouvert
2025
article
OpenAlex
Joakim Kattelus, Jorge Velasco, Paavo Auvinen, Aitor Arandia et autres
Abstract Amides, which contain both oxygen and nitrogen, are present in many potential feedstocks for renewable fuels. There is a consequent need to study the hydrodenitrogenation (HDN) and hydrodeoxygenation (HDO) of amides. This work studies the HDN and HDO of hexadecanamide with …
fi
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Accès ouvert
2025
preprint
OpenAlex
Joakim Kattelus, Emma Verkama, Jorge Velasco, Reetta Karinen et autres
In this work, the mechanism of hydrodenitrogenation (HDN) of aliphatic primary amines was studied both computationally and experimentally. Such amines are intermediates during HDN of renewable feedstocks, and studying amine HDN is thus important for both catalyst and process design. The computational …
fi
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Accès ouvert
2025
article
OpenAlex
Ellen Järvinen, Jorge Velasco, Reetta Karinen, Riikka L. Puurunen
Abstract While the temperature-programmed desorption of ammonia (NH 3 -TPD) is widely used to analyze the combined Lewis and Brønsted acidity of heterogeneous catalysts, the temperature-programmed desorption of isopropylamine (IPAm-TPD) can be used for the selective analysis of Brønsted acidity. This work …
fi
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Accès ouvert
2025
article
OpenAlex
Aitor Arandia, Jorge Velasco, Ahmed Sajid, Jihong Yim et autres
Copper promoted with zinc is an active catalyst for carbon dioxide hydrogenation to methanol, a reaction relevant to carbon capture and utilization technologies. Previous work showed that inverse zinc-on-copper catalysts on zirconia supports, where zinc(II) is added via atomic layer deposition (ALD), …
fi
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Accès ouvert
2024
article
OpenAlex
Leoni Klingelhöfer, Joakim Kattelus, Emma Verkama, Jorge Velasco et autres
The Pt-catalyzed hydrotreatment of primary, secondary and tertiary amines proceeds via a shared reaction network. N-removal occurs through condensation or C–N hydrogenolysis steps involving the primary amine.
de, fi
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