Advancing Biogas Quality: Tackling Siloxane Challenges for Smooth Energy Transition
Siloxanes, present in everyday items, can compromise the efficiency and durability of bioenergy systems, even at trace levels. Monitoring and quantifying these impurities are critical for improving biogas quality and expanding its role in renewable energy. However, sampling biogas and storing samples containing siloxanes for analysis remain a significant challenge.
Comment les catalyseurs éliminent des oxydes d’azote dangereux
En catalyse industrielle, le fer n'est pas égal au fer.
Novel Photoresist Chemistry Enables Lithography Approaching Angstrom-Scale Resolution
Photoresist materials are crucial in the manufacturing of computer chips, where the circuits are initially printed in the photoresist using photolithography. As the demand for smaller and more precise circuitry in computer chips grows, photoresists must resolve features with smaller sizes and higher density.
Revolutionizing Renewable Processes: Ambizione Grant Winner Emanuele Moioli
Emanuele Moioli is one of the recipients of the prestigious Ambizione Grant awarded by the Swiss National Science Foundation (SNSF) on a yearly basis. With the great news of his award having arrived in August 2022, Moioli embarks on the journey of his groundbreaking project titled “Moving catalyst vs. Multi-catalyst: determination of the best reactor for the processing of unconventional feedstock,” set to commence this August 2023.
Faire voler des avions de manière durable
Voler sans empreinte CO2 – le PSI et l'entreprise Metafuels AG développent une nouvelle technologie pour la production de carburant aviation durable.
Cooperation and licensing agreement between the Paul Scherrer Institute and Alphasynt
The Paul Scherrer Institute and Alphasynt have recently signed a cooperation- and licensing agreement. In doing so, the two pave the way for a fruitful collaboration in the commercialization of methanation.
Unir les forces pour la transition énergétique
L’Institut Paul Scherrer PSI et la start-up AlphaSYNT commercialisent une nouvelle approche pour stocker l’énergie sous forme de méthane.
Le power-to-gas pour l’autosuffisance
Une nouvelle installation génère du gaz naturel de synthèse pour chauffer les immeubles d’habitation
Unravelling the catalyst aging phenomena in vehicle emission control.
PSI has collaborated with catalyst and engine manufacturers to understand the aging phenomena of emission control catalysts. To this end, a diesel oxidation catalyst with a relevant mileage was carefully analysed; the results suggest that a complex combination of poisoning and thermal sintering is the cause of deactivation during driving. A reactor setup was then developed to simulate poisoning and sintering effects for prediction of catalyst durability in time and cost effective manner.
Extraire le maximum d’énergie de la biomasse
Des chercheurs du PSI démarrent l’exploitation d’une installation pilote révolutionnaire de production de biogaz synthétique.
Matter before solid nucleation under synchrotron light
Investigation on early stage of solid formation from solution, before nucleation, have been carried out at PSI by small angle scattering technique using X-ray light from the Swiss Light Source SLS. The system under analysis was calcium carbonate, a model system archetype of several sparsely soluble inorganic materials and relevant in many field such as CO2 capturing and biomineralization. The experimental setup, the method, and developed theoretical framework can be applied to many other systems and made available for the entire scientific community.
Kinetics and Mechanism of Metal Nanoparticle Growth via Optical Extinction Spectroscopy and Computational Modeling: The Curious Case of Colloidal Gold
An overarching computational framework unifying several optical theories to describe the temporal volution of gold nanoparticles (GNPs) during a seeded growth process is presented. To achieve this, we sed the inexpensive and widely available optical extinction spectroscopy, to obtain quantitative kinetic data. In situ spectra collected over a wide set of experimental conditions were regressed using the hysical model, calculating light extinction by ensembles of GNPs during the growth process. This model rovides temporal information on the size, shape, and concentration of the particles, and any electromagnetic interactions between them. Consequently, we were able to describe the mechanism of GNP growth and divide the process into distinct genesis periods. We provide explanations for several longstanding mysteries, e.g., the phenomena responsible for the purple-greyish hue during the early stages of GNP growth, the complex interactions between nucleation, growth and aggregation events, and a clear distinction between agglomeration and electromagnetic interactions. The presented theoretical formalism has been developed in a generic fashion so that it can readily be adapted to other nanoparticulate formation scenarios such as the genesis of various metal nanoparticles.
Gaz d'échappement purifiés grâce à une structure en éponge
Des chercheurs du PSI ont développé un nouveau catalyseur pour le traitement des gaz d'échappement des moteurs à gaz naturel. Il reste très actif même à basse température et pendant longtemps. La combustion du gaz naturel est ainsi plus propre et plus respectueuse du climat. Cela renforce l'attrait du gaz naturel et du biogaz comme alternative aux produits pétroliers, par exemple comme carburant pour les voitures.
Supported gold as catalyst for the decomposition of ammonia precursors in the selective catalytic reduction of NOx
Titaniumdioxide supported gold was found to catalyze the hydrolysis of formate-based ammonia precursor compounds which are proposed for the selective catalytic reduction of nitrogen oxides (NOx) in combustion exhaust gas. In contrast to other noble metals, the supported gold does not oxidize the released NH3, while it maintains decomposition of intermediate formic acid.
Influence of Methyl Halide Treatment on Gold Nanoparticles Supported on Activated Carbon
Gold particles supported on carbon when subjected to a flow of methyl iodide or bromide redisperse from large ensembles to single atoms and/or dimers of gold. Methyl halide oxidizes gold leading to gradual particle dissolution. The process could be carried out at temperatures as low as 50 °C. The excess of halide could be removed by a post-treatment of the material with 1%H2O/H2, which does not influence the metal dispersion. This remarkable transformation opens the possibility of re-activating gold catalysts that lost their performance due to metal particles sintering.
Vibrational Spectra of Adsorbates from DFT
The hydrolysis of isocyanic acid was studied experimentally and theoretically and a reaction mechanism on different catalysts was established. The decreasing NOx emission limits for diesel vehicles impel the further development of the existing NOx deactivation technologies, particularly the selective catalytic reduction (SCR) of nitrogen oxides with urea. In the urea-SCR process, urea is injected into the hot exhaust gas, where it thermally decomposes into isocyanic acid (HNCO) and ammonia.