Results 21 to 30 of about 112 (108)

CNG und LNG aus biogenen Reststoffen – ein Konzept zur ressourcenschonenden Kraftstoffproduktion CNG and LNG from Biogenic Residues – A Concept for Resource‐Saving Fuel Production

Chemie Ingenieur Technik, Volume 92, Issue 1-2, Page 144-155, January/February 2020., 2020
Ein Verfahren zur Kopplung von Biomassevergasung, Hochtemperaturelektrolyse und Methanisierung wurde entwickelt, das die Produktion von Bio‐CNG und Bio‐LNG ermöglicht. Biogener Kohlenstoff wird dabei effizient und nahezu vollständig in die Produkte überführt, weshalb dieser PtX‐Prozess eine wichtige Rolle im zukünftigen Energiesystem einnehmen kann ...
Christian Müller, Régis Anghilante, Max Schmid, Marlies Härdtlein, Reinhold Spörl, David Colomar, Felix Ortloff, Ludger Eltrop, Frank Graf, Siegfried Bajohr, Thomas Kolb   +10 more
wiley   +1 more source

Grenzflächen‐Photoelektrochemie in der Organischen Synthese

Angewandte Chemie, Volume 137, Issue 42, October 13, 2025.
Heterogene Photoelektroden sind für die Aktivierung von H2O und CO2 weit verbreitet, während homogene Photoelektrochemie mit molekularen Katalysatoren die Aktivierung komplexer Moleküle in der Synthese dominiert. Dennoch bietet Grenzflächen‐Photoelektrochemie (iPEC) ein großes Potenzial für die Synthese, einschließlich Kosteneffizienz ...
Gabriel Chan, Daria Corsi, Oleksandr Savateev, Paolo Giusto, Joshua P. Barham   +4 more
wiley   +1 more source

Oxygen Diffusion in Li(Nb,Ta)O3 Single Crystals

physica status solidi (a), Volume 222, Issue 1, January 2025.
The self‐diffusion of oxygen in Li(Nb,Ta)O3 single crystals is studied experimentally. The diffusivities decrease with increasing Ta content in the crystals. The activation enthalpy of diffusion of about 3.5 eV is compared with the energy barrier of a single O vacancy determined by nudged elastic band/density‐functional theory calculations.
Claudia Kofahl, Johanna Uhlendorf, Brendan A. Muscutt, Mike N. Pionteck, Simone Sanna, Holger Fritze, Steffen Ganschow, Harald Schmidt   +7 more
wiley   +1 more source

Evolution of the Electrical Conductivity of LiNb1−xTaxO3 Solid Solutions across the Ferroelectric Phase Transformation

physica status solidi (a), Volume 222, Issue 1, January 2025.
The decrease in activation energy of electrical conductivity that occurs in LiNb1‐xTaxO3 solid solutions during the transition from the ferroelectric to the paraelectric phase is investigated. The effect is composition‐dependent and decreases with the Ta content x.
Fatima‐Ezzahrae El Azzouzi, Detlef Klimm, Alexander Kapp, Leonard M. Verhoff, Nils A. Schäfer, Steffen Ganschow, Klaus.‐Dieter Becker, Simone Sanna, Holger Fritze   +8 more
wiley   +1 more source

A High‐Temperature Optical Spectroscopy Study of the Fundamental Absorption Edge in the LiNbO3–LiTaO3 Solid Solution

physica status solidi (a), Volume 222, Issue 1, January 2025.
An optical bandgap study has been conducted on single crystals of the LiNbO3−LiTaO3 solid solution. At room temperature, bandgaps of LiNbO3 and LiTaO3 amount to about 4.0 and 4.6 eV, respectively. With rising temperatures, up to 1200 °C, bandgaps decrease by about 35%; their compositional variation is found far from linear.
Piotr Gaczyński, Yuriy Suhak, Steffen Ganschow, Simone Sanna, Holger Fritze, Klaus‐Dieter Becker   +5 more
wiley   +1 more source

Acoustic Loss in LiNb1−xTaxO3 at Temperatures up to 900 °C

physica status solidi (a), Volume 222, Issue 1, January 2025.
This study delves into the characterization of acoustic losses in LiNb1−xTaxO3 solid solutions at elevated temperatures. By examining different compositions, valuable insights into charge transport phenomena and material constants are uncovered in the study.
Uliana Yakhnevych, Vanik Sargsyan, Fatima El Azzouzi, Alexander Kapp, Felix Bernhardt, Yuriy Suhak, Steffen Ganschow, Harald Schmidt, Simone Sanna, Holger Fritze   +9 more
wiley   +1 more source

Durch Licht Aufladbare Mn‐Basierte Metall‐Organische Gerüstverbindungen und Davon Entkoppelte Photokatalyse

Angewandte Chemie, Volume 136, Issue 37, September 9, 2024.
MnBr‐253‐Partikel wurden als dreidimensionale Metall‐organische Gerüstverbindungen auf der Grundlage von MOF‐253‐ und MnBr(CO)3(bpy)‐Komplexen synthetisiert und als kolloidale Systeme ohne Netzwerk zur Entkopplung von Lichtsammlung und hochenergetischer Elektronenspeicherung entwickelt.
Shufan Wu, Philip M. Stanley, Simon N. Deger, Mian Zahid Hussain, Andreas Jentys, Julien Warnan   +5 more
wiley   +1 more source

Numerical modeling of HTS excited medium‐speed wind generators with diode rectifier stator feeding

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Volume 37, Issue 5, September/October 2024.
Abstract Medium‐speed wind generators in the MW‐range with high‐temperature superconducting excitation winding are analyzed by means of non‐linear 2D and 3D FEM models. Besides an inverter‐based sinusoidal stator current feeding, a grid connection via a diode rectifier is analyzed by using coupled FEM and circuit simulations.
Robin Köster, Andreas Binder
wiley   +1 more source

The COSMHYC Project Series: Innovative Hydrogen Compression Solutions

Chemie Ingenieur Technik, Volume 96, Issue 1-2, Page 36-42, January/February 2024.
Gaseous hydrogen storage requires a compression step in which traditional compressors face reliability and performance issues. Metal hydride compression offers a solution and the COSMHYC projects propose a hybrid concept, integrating advantages of both technologies, to support the rapid expansion of hydrogen infrastructures.
Rami Chahrouri, David Colomar, Antoine Jeanmougin, Alberto Martinez-Abenojar   +3 more
wiley   +1 more source

Can't We Do Better? A cost-benefit analysis of proposal writing in a competitive funding environment. [PDF]

PLoS One, 2023
Schweiger G.
europepmc   +1 more source