Search for dissertations about: "co2-reduction"

Showing result 1 - 5 of 33 swedish dissertations containing the word co2-reduction.

2. 1. Theoretical Studies on CO2 Reduction Electrocatalysts

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

   Abstract : 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. READ MORE

4. 2. Transition Metal-Based Electrocatalysts for Alkaline Water Splitting and CO2 Reduction

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

   Abstract : 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. READ MORE

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

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

   Abstract : 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. READ MORE

6. 4. First principles studies of CO2 activation and reduction over indium oxide and copper surfaces

   Author : Alvaro Posada Borbon; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; CO2 reduction; indium oxide; Heterogeneous catalysis; methanol conversion; Density Functional Theory; copper surface;

   Abstract : Catalytic recycling of carbon dioxide (CO2) to added-value chemicals, such as methanol (CH3OH), have been proposed as a possible path for sustainable production of fuel and chemicals, in addition to providing a route to mitigate anthropogenic carbon emissions. Several catalytic systems are known to be active for conversion of CO2 to methanol, Cu/ZnO/Al2O3 being the main industrial catalyst for the process. READ MORE

7. 5. On the Function of Ceria Supported Rhodium Catalysts for Methanation of Carbon Dioxide

   Author : Felix Hemmingsson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HE-XRD; Catalytic methanation; AP-XPS; In situ spectroscopy; DRIFTS; Sabatier reaction; CO2 reduction; Hydrogenation;

   Abstract : Technologies for energy harvesting of sustainable sources such as solar and wind lack an inherent energy buffer. As such, storing excess energy in chemical bonds, for example that of hydrogen (H2), is a desirable complementary concept. READ MORE