Sökning: "Oxygen Carrier"

Visar resultat 16 - 20 av 105 avhandlingar innehållade orden Oxygen Carrier.

1. 16. Thermal Analysis and Investigation of NiO-Based Oxygen Carriers for Chemical-Looping Combustion

   Författare :Erik Jerndal; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Oxygen Carrier; Carbon Dioxide Capture; Chemical-Looping Combustion; Nickel Oxide; Fluidized Bed; Thermodynamics;

   Sammanfattning : Capture and storage of CO2 can be used to reduce greenhouse gas emissions from combustion of fossil fuels. Chemical-looping combustion is a two-step combustion process where CO2 is obtained in a separate stream, ready for compression and storage. LÄS MER

3. 17. Fate of Trace Elements in Thermochemical Conversion of Waste Fuels Using Oxygen Carriers

   Författare :Ivana Stanicic; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Oxygen Carrier Aided Combustion; X-ray Photoelectron Spectroscopy; Ash interaction; Chemical Looping Technologies; Thermodynamic Calculations; Waste; Oxygen Carriers; Ilmenite; Trace Elements;

   Sammanfattning : The metals zinc, copper and lead are amongst the more abundant trace elements in waste fuels. The fate of these elements is important to study because they can affect the thermochemical conversion process and end up in ashes. LÄS MER

4. 18. Selection of oxygen carriers for chemical-looping combustion using methane as a fuel

   Författare :Marcus Johansson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Carbon Dioxide Capture; Nickel oxide; CO2 Separation; Oxygen Carrier; Iron oxide; Manganese oxide.; Chemical-Looping Combustion;

   Sammanfattning : In order to meet new demands on clean energy producing technologies, chemical-looping combustion could play an important role. With this technique, CO2 from the flue gases can be separated and collected without excessive energy and efficiency penalty. This is because nitrogen from the combustion air is never mixed with the fuel. LÄS MER

5. 19. Properties of oxygen carriers based on natural and waste materials at high degrees of reduction

   Författare :Victor Purnomo; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high reduction; defluidization; chemical-looping gasification; oxygen carrier; reactivity;

   Sammanfattning : Oxygen carriers play an important role in multiple energy conversion processes, such as chemical-looping technology and oxygen-carrier-aided combustion. This thesis particularly explores how a high reduction degree of an oxygen carrier can affect its performance. LÄS MER

7. 20. 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