L'impact de la directive AIFM sur les fonds de private equity

Droit bancaire et financie

Heterogeneous catalysts for hydrogen production from methane and carbon dioxide

Several heterogeneous catalysts were studied for synthesis gas production through dry reforming of methane (DRM). This process uses carbon dioxide in lieu of the steam that is traditionally used in conventional methane reforming to produce hydrogen that can then be repurposed in more chemical processes [2]. The monometallic catalysts explored were Ni/Al2O3 and Ni/CeZrO2 followed by their bimetallic versions PtNi/Al 2O3 and PtNi/CeZrO2 at 800°C. In addition to these catalysts, platinum supported Zeolitic Imidazolate Framework (ZIF)-8 was also investigated in comparison with PtNi/CeZrO2 at 490°C. The studies suggest that these catalysts are suitable for promoting the dry reforming of methane for hydrogen production

Chemie der laserinduzierten Abscheidung von Germanium, Silizium und Germanium-Silizium Legierungen Schlussbericht

1. Current situation in science and technology: In thin film technology methods are needed which allow the in situ diagnostics of film growth in the interface region with atomic resolution. 2. Aims of investigation: The aim of the present project was the diagnostics of deposition of a-Si:H, a-Ge:H, and a-Si, Ge:H in the nucleation and coalescence region with spectroscopic methods in the IR to UV spectral range. 3. Methods: As methods FTIR-transmission spectroscopy (FTIITR-TS) and spectroscopic ellipsometry (SE) were developed with monolayer resolution. For the simulation of the complex surface chemistry a stochastic reaction model was used. 4. Results: With FTIR-TS the bonding configuration of hydrogen at the surface and in the bulk was identified in situ during growth. SE allowed the determination of the surface roughness, the thickness and the optical constants of the growing film in real time. The spectroscopic results were simulated by using a combined gas phase- and surface reaction model. 5. Applications: The methods developed allow an in situ analysis of nucleation and growth in real time. (orig.)SIGLEAvailable from TIB Hannover: F97B2256+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman