Sökning: "Energy migration"
Visar resultat 11 - 15 av 149 avhandlingar innehållade orden Energy migration.
11. Mechanism of the passive NOx adsorption process on zeolite-supported Pd in controlling cold-start emissions
Sammanfattning : Passive NOx adsorbers (PNA) have been used for preventing NOx emissions being released during a cold start. This method involves trapping NOx on an adsorbent at low temperatures and releasing them later, when the exhaust temperature exceeds 200℃. LÄS MER
12. Behavior of iron-based oxygen carriers at deep reduction states
Sammanfattning : Oxygen carriers have an important role as bed materials in both common circulating fluidized bed combustion unit (also known as oxygen-carrier-aided combustion, OCAC) and in various chemical looping processes. Contrary to conventional bed materials, e.g., sand, oxygen carriers are capable of transferring both oxygen and heat. LÄS MER
13. Time and energy in long-distance bird migration
Sammanfattning : Long-distance seasonal migration is energetically demanding and time consuming. For example, some passerine birds are on migration during six months of the year, travel more than 10 000 km and make use of many fuelling sites. Migration requires many different decisions, and an individual bird will face a variety of situations. LÄS MER
14. Electronic Energy Migration/Transfer as a Tool to Explore Biomacromolecular Structures
Sammanfattning : Fluorescence-based techniques are widely used in bioscience, offering a high sensitivity and versatility. In this work, fluorescence electronic energy migration/ transfer is applied to measure intramolecular distances in two types of systems and under various conditions. LÄS MER
15. Material migration in tokamaks: Studies of deposition processes and characterisation of dust particles
Sammanfattning : Thermonuclear fusion may become an attractive future power source. The most promising of all fusion machine concepts is the tokamak. Despite decades of active research, still huge tasks remain before a fusion power plant can go online. One of these important tasks deals with the interaction between the fusion plasma and the reactor wall. LÄS MER