Sökning: "looping effect"

Visar resultat 1 - 5 av 15 avhandlingar innehållade orden looping effect.

1. 1. Oxygen Carriers Materials for Chemical-Looping Technologies

   Författare :Muhammad Qamar Ul Islam Zafar; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Natural gas; Reaction kinetics; Oxygen carriers; Chemical-looping reforming; TGA; Chemical-looping combustion; CO2; Metal oxides;

   Sammanfattning : Carbon dioxide is the gas which contributes most to the greenhouse effect. It is released in large quantities from fossil fuel-based power plants around the world. It is generally accepted that a rapid decrease in the emissions of carbon dioxide is needed. LÄS MER

3. 2. Manganese ores as oxygen carriers for chemical-looping combustion

   Författare :Sebastian Sundqvist; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical-looping with oxygen uncoupling; gaseous fuel; methane; syngas; Chemical-looping combustion; manganese ores; combined oxides; wood char and solid fuels;

   Sammanfattning : Chemical looping combustion (CLC) is a fluidized bed system that circulates metal oxide particles in order to transport oxygen from an air reactor to a fuel reactor. In the fuel reactor a fuel reduces the oxygen carrier while producing CO2 and H2O. The oxygen carrier is then transported back to the air reactor and reoxidized. LÄS MER

4. 3. Manganese Combined Oxides as Oxygen Carriers for Chemical-Looping Combustion

   Författare :Malin Hanning; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; carbon capture; combined oxide; manganese oxide; chemical-looping;

   Sammanfattning : The global emissions of greenhouse gases are increasing and the development of mitigation measures is becoming more important. One of the alternatives proposed is carbon capture and storage, where the carbon dioxide emitted from large point sources is captured, compressed and stored in underground storage sites. LÄS MER

5. 4. Sjukskrivningssystemet : Sjuka som blir arbetslösa och arbetslösa som blir sjukskrivna

   Författare :Daniel Melén; Sociologiska institutionen; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; work inability; social security system; welfare state; social insurance agency; employment agency; unemployed ill; labor market; residual unemployment; unemployment; absence due to illness; long-term illness; feed back loop; the swedish model; fieldwork; phenomenology; ethnomethodology; looping effect; disability; work ability; den svenska modellen; fältarbete; socialförsäkring; den svenska välfärdsstaten; Välfärd; arbetslösa sjukskrivna; arbetslöshet; sjukskrivning; arbetsförmedlingen; fenomenologi; långtidssjukskrivning; etnometodologi; försäkringskassan; samverkan; dold arbetslöshet; arbetsförmåga; arbetsmarknad; arbetsoförmåga;

   Sammanfattning : In 1997 the number of long-term absences due to illness began and continued to rise in Sweden. Traditional explanations of why this is so have been centered on either blaming the individual or blaming the work environment. LÄS MER

7. 5. Design, modelling and operation of a 100 kW chemical-looping combustor for solid fuels

   Författare :Pontus Markström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CO2 capture; Fluidised beds; Chemical-looping combustion; Modelling; Carbon capture and storage; Oxygen carriers;

   Sammanfattning : With the increasing threat of global warming, technologies for efficient capture and storage of the greenhouse gas CO2 are sought after. Chemical-looping combustion is a novel CO2 capture technology that can be applied when burning gaseous, liquid or solid fuels. LÄS MER