Sökning: "TWC"

Visar resultat 6 - 10 av 17 avhandlingar innehållade ordet TWC.

1. 6. Deactivation of commercial three-way catalysts: Experimental and theoretical studies

   Författare :Anna Fathali; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; car exhaust; three-way catalyst TWC ; alumina; fuel-cut; palladium; ; hydrocarbon cracking; ceria; deactivation; oxygen storage capacity OSC ; rhodium; zirconia; sintering; monolith catalyst; catalysis;

   Sammanfattning : This PhD thesis is a summary of my work with thermal deactivated commercial three way catalysts (TWCs). An examination of catalytic properties, before and after accelerated aging was performed, such as light-off temperature, specific surface area (BET), noble metal dispersion and oxygen storage capacity was performed. LÄS MER

3. 7. Markets for Energy Efficiency - Exploring the new horizons of tradable certificate schemes

   Författare :Luis Mundaca; Internationella miljöinstitutet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Energy Efficiency; Tradable Certificate Scheme; Policy Evaluation;

   Sammanfattning : This doctoral thesis explores the implications of establishing tradable certificate schemes for improving energy efficiency (so-called ‘Tradable White Certificate’ [TWC] schemes). Carrying out different case studies, a set of complementary evaluation methods is applied in conducting ex-ante and ex-post evaluation studies. LÄS MER

4. 8. In situ Studies of Platinum Catalyst Sintering

   Författare :Pooya Tabib Zadeh Adibi; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanoparticle sintering; indirect nanoplasmonic sensing; operando spectroscopy; transmission electron microscopy; platinum; catalyst deactivation; sintering kinetics;

   Sammanfattning : The damaging effect of pollutants from combustion engine exhaust on human health and environment is well recognized. Since the 70s, the three-way catalytic converter (TWC) has substantially improved the urban air quality by simultaneous conversion of CO, NOx and unburned hydrocarbons to O2, N2 and H2O. LÄS MER

5. 9. Studies of catalyst sintering during operating conditions

   Författare :Pooya Tabib Zadeh Adibi; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nanoparticle sintering; operando spectroscopy; catalyst deactivation; indirect nanoplasmonic sensing; platinum; sintering kinetics;

   Sammanfattning : The damaging effect of pollutants from exhaust gas of combustion engines on the human health and the environment is well recognized. Since the 70s, the three-way catalytic converter (TWC) has substantially improved the urban air quality by simultaneous conversion of CO, NOx and unburned hydrocarbons to O2 , N2 , CO2 and H2O. LÄS MER

7. 10. Dynamics in Ceria and Related Materials from Molecular Dynamics and Lattice Dynamics

   Författare :Anders Gotte; Kersti Hermansson; Micael Baudin; Anatoly Belonoshko; Uppsala universitet; []
   Nyckelord :Inorganic chemistry; molecular dynamics; diffusion; surface dynamics; ionic surfaces; Oorganisk kemi;

   Sammanfattning : In discussions of heterogeneous catalysis and other surface-related phenomena, the dynamical properties of the catalytic material are often neglected, even at elevated temperatures. An example is the three-way catalyst (TWC), used for treatment of exhaust gases from combustion engines operating at several hundred degrees Celsius. LÄS MER