Sökning: "material cycling"
Visar resultat 1 - 5 av 172 avhandlingar innehållade orden material cycling.
1. Examining Inequalities in Cycling Motility : A Pathway Towards Cycling Justice
Sammanfattning : Realizing the environmental and social benefits of cycling requires effective policies that deliver increased and inclusive cycling. This thesis aims to contribute to the development of such policies by providing insights into what could make cycling achievable for more diverse social groups through engaging with theoretical perspectives from transport geography, the mobilities paradigm and social justice. LÄS MER
2. Interest in Material Cycle Closure? Exploring Evolution of Industry's Responses to High-grade Recycling from an Industrial Ecology Perspective
Sammanfattning : Many anthropogenically-produced or beneficiated materials contained in “end-of-life” products retain a great proportion of the invested manufacturing work when discarded. Very few such materials are reconstituted and applied in new products at the same material inherent quality level as in their first lifetime – a process known as “closed-loop recycling”. LÄS MER
3. Nitrogen Cycling at Cold Climate Mine Sites in Northen Sweden
Sammanfattning : High nitrogen discharge from mining sites has been an environmental issue that has been closely studied in the recent years. The environmental effects of high nitrogen discharge are mainly eutrophication, but can also lead to changed species composition and algae blooms. LÄS MER
4. Oxidation, Creep and Fatigue Synergies in Cast Materials for Exhaust Manifolds
Sammanfattning : The future development of engines of heavy-duty vehicles towards reduced CO2 emission will increase the exhaust gas temperature and render the exhaust atmosphere more corrosive. The current service material of exhaust gas components - a ferritic ductile cast iron called SiMo51 - will soon meet its upper-temperature limit. LÄS MER
5. Degradation Mechanisms of Heat Resistant Steel at Elevated Temperatures : In an Iron Ore Pelletizing Industry
Sammanfattning : This thesis focuses on the different degradation mechanisms of the stainless steel in a travelling grate in a Grate-Kiln iron ore pellet indurator. The travelling grate is a conveyor belt that transports green-body pellets to a rotary kiln while the pellets are being dried and pre-heated to a temperature of 900-1100 °C by recycled hot air. LÄS MER