Der Wasserstoffmotor – Chancen und Herausforderungen auf dem Weg zu einer dekarbonisierten Mobilität

Lott, Patrick; Wagner, Uwe; Koch, Thomas; Deutschmann, Olaf

doi:10.1002/cite.202100155

Cited by 14 publications

(5 citation statements)

References 90 publications

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“…So far, the catalytic activity has only been discussed in a model-like dry reaction gas mixture. However, hydrogen combustion engines emit considerable amounts of steam [37] that can influence both activity and selectivity of noble from two N ad or N 2 O from NO ad and N ad . Combining this mechanism with our observed increase in N 2 O formation, we can assume a higher NO ad to N ad ratio on the surface with TiO 2 promotion at low temperature.…”

Section: Catalyst Activity Testsmentioning

confidence: 99%

Selective Catalytic Reduction with Hydrogen for Exhaust gas after-treatment of Hydrogen Combustion Engines

2022

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In this work, two palladium-based catalysts with either ZSM-5 or Zeolite Y as support material are tested for their performance in selective catalytic reduction of NOx with hydrogen (H2-SCR). The ligh-toff measurements in synthetic exhaust gas mixtures typical for hydrogen combustion engines are supplemented by detailed catalyst characterization comprising N2 physisorption, X-ray powder diffraction (XRD), hydrogen temperature programmed reduction (H2-TPR) and ammonia temperature programmed desorption (NH3-TPD). Introducing 10% or 20% TiO2 into the catalyst formulations reduced the surface area and the number of acidic sites for both catalysts, however, more severely for the Zeolite Y-supported catalysts. The higher reducibility of the Pd particles that was uncovered by H2-TPR resulted in an improved catalytic performance during the light-off measurements and substantially boosted NO conversion. Upon exposition to humid exhaust gas, the ZSM-5-supported catalysts showed a significant drop in performance, whereas the Zeolite Y-supported catalyst kept the high levels of conversion while shifting the selectivity from N2O more toward NH3 and N2. The 1%Pd/20%TiO2/HY catalyst subject to this work outperforms one of the most active and selective benchmark catalyst formulations, 1%Pd/5%V2O5/20%TiO2-Al2O3, making Zeolite Y a promising support material for H2-SCR catalyst formulations that allow efficient and selective NOx-removal from exhaust gases originating from hydrogen-fueled engines.

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Section: Catalyst Activity Testsmentioning

confidence: 99%

Selective Catalytic Reduction with Hydrogen for Exhaust gas after-treatment of Hydrogen Combustion Engines

2022

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“…Abbildung 12. Spezifische CO-und HC-Emissionen in Abha ¨ngigkeit der Last p mi und des Saugrohrdrucks [32].…”

Section: Cfd-simulation Bei Wasserstoffeinblasungunclassified

Trends und Herausforderungen bei der Entwicklung von Wasserstoffmotoren

Kubach,

Bucherer,

Gerber

et al. 2023

Chemie Ingenieur Technik

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Auf dem Weg zu einer klimaneutralen Mobilität können Wasserstoffmotoren vor allem im Bereich der Nutzfahrzeuge einen entscheidenden Beitrag leisten. Die Basistechnologie der Motoren ist bereits vorhanden und kann durch geringe Modifikationen angepasst werden. Der vorliegende Artikel beschreibt Trends bei der Wasserstoffmotorenentwicklung und wie deren Herausforderungen gemeistert werden können. Neben Aspekten der Infrastruktur und des Gesamtfahrzeugkonzepts stehen vor allem die Punkte Gemischbildung, Verbrennung und Emissionen im Fokus.

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“…In particular, hydrogen based decarbonization of sectors like iron and steel production [7], shipping [8], heavy-duty land transportation [9], and aviation [10] have received great interest in recent years. Efforts have also been made to adapt combustion engines from internal combustion engines [11] to heavy-duty gas turbines [12] to run on hydrogen fuel.…”

Section: Introductionmentioning

confidence: 99%