Sökning: "CO2 reduction"

Visar resultat 1 - 5 av 291 avhandlingar innehållade orden CO2 reduction.

1. 1. Theoretical Studies on CO2 Reduction Electrocatalysts

   Författare :Xiaoyu Chen; Mårten S. G. Ahlquist; Sandra Luber; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computational Chemistry; CO2 reduction; electrocatalysis; Teoretisk kemi och biologi; Theoretical Chemistry and Biology;

   Sammanfattning : The atmospheric CO2 concentration has increased by more than 20% since 1980s and has now reached the highest level than at any point in the past 800 000 years. Electrochemical CO2 reductions are receiving particular in- terest as the apparatus are relatively easy to maintain and cheap to operate. LÄS MER

3. 2. NOx Storage and Reduction Catalysts. Reduction with Hydrogen and the Influence of Water and Carbon Dioxide

   Författare :Anna Maria Lindholm; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NSR catalyst; Pt Ba Al; H2O; CO2; Pt Al; NOx reduction; H2; NH3 formation; NOx storage; Lean NOx Trap; N2O formation; kinetic modeling; Pt Si;

   Sammanfattning : Environmental concern has increased over the past several years and resulted in stringent emission legislation on NOx, CO, and hydrocarbon emissions from automobile exhausts. Moreover, the demands to improve the fuel efficiency of engines and to lower the CO2 emissions have increased, and a way to meet this is by using lean burn engines which operate with oxygen excess. LÄS MER

4. 3. Possibilities of CO2 emission reduction : process integration analysis and carbon trading schemes

   Författare :Chuan Wang; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energiteknik; Energy Engineering;

   Sammanfattning : Climate change is one of the greatest challenges faced by today's society. With more evidence from scientists, the need to manage greenhouse gas emissions has been increasing in response to international climate change negotiations. LÄS MER

5. 4. Opportunities for CO2 Reductions and CO2-Lean Energy Systems in Pulp and Paper Mills

   Författare :Kenneth Möllersten; KTH; []
   Nyckelord :CO2 reduction; pulp and paper industry; energy system; biomass; CO2 capture and sequestration; black liquor; gasification; power production; outsourcing; sustainable energy management;

   Sammanfattning : The risk for climate change is a growing concern for theglobal society. According to what is known as the Kyoto Protocol,developed countries have committed themselves to reduce theirgreenhouse gas (GHG) emissions. The purpose of this thesis hasbeen to analyse opportunities for CO2 reductions in Swedish pulpand paper mills. LÄS MER

7. 5. Transition Metal-Based Electrocatalysts for Alkaline Water Splitting and CO2 Reduction

   Författare :Zhen Qiu; Tomas Edvinsson; Kevin Sivula; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Alkaline water splitting; CO2 reduction; Electrocatalyst; In-situ Raman spectroscopy.; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

   Sammanfattning : With excessive usage of fossil fuels and ever-increasing environmental issues, numerous efforts have been devoted to the development of renewable energies for the replacement of traditional fossil fuels to reduce greenhouse gas emission and realize the rapidly growing demand for global energy. Renewable energies, however, often show diurnal and seasonal variations in power output, forming a need for energy storage to meet people’s continuous energy supply. LÄS MER