Sökning: "exhausts"

Visar resultat 1 - 5 av 39 avhandlingar innehållade ordet exhausts.

1. 1. Health costs of particle emissions : economic valuation of increased mortality due to exhaust emissions of fine particles

   Författare :Ingemar Leksell; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; emissions; economic valuation; traffic; particles; social costs; exhausts; exposure; health effects; particulate matter; air pollution; mortality; health economy; environmental economy; health costs; discounting;

   Sammanfattning : .... LÄS MER

3. 2. Exhaust aftertreatment under lean conditions, regenerable SOx traps and NOx reduction catalysts

   Författare :Lisa Kylhammar; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Heterogenous catalysis; Selective catalytic reduction; HC-SCR; Sulfur storage; SOx trap; Spectroscopy; Lean exhausts; NOx; Ag Al2O3; DRIFT; XPS;

   Sammanfattning : The aim of this thesis was to investigate i) potential materials for regenerable SOx traps and ii) the influence of silver distribution within Ag/Al2O3 catalysts on the selective reduction of NOx by hydrocarbons (HC-SCR). Both areas are highly relevant for present and future vehicle aftertreatment technologies for lean exhausts. LÄS MER

4. 3. Physicochemical properties and atmospheric ageing of soot - investigated though aerosol mass spectrometry

   Författare :Axel Eriksson; Kärnfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Black carbon; soot; vehicle exhausts; wood stove emissions; atmospheric processing; SP-AMS;

   Sammanfattning : Aerosol particles contribute significantly to the global burden of disease, and remain the main source of uncertainty in assessments of human-induced climate change. The microphysical characterization of particles is necessary to understand the roles they play in the detrimental effects of air pollution on human health, and in the energy budget of our planet. LÄS MER

5. 4. Sampling and analysis of polynuclear aromatic hydrocarbons with special reference to automobile exhausts

   Författare :Ulf Stenberg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : A literature survey concerning the progress in sampling of polynu clear aromatic hydrocarbons, PAH, from automobile exhausts is pre seated. In this conjunction the included analytical methods are discussed, and some emphasis is put on injection technique and column performance. LÄS MER

7. 5. Methods for Determination of Benzo(a)pyrene and High Molecular Weight (>300 Da) Polycyclic Aromatic Hydrocarbons in Particulate Matter from Ambient Air and Vehicle Exhausts

   Författare :Christoffer Bergvall; Roger Westerholm; Stephen Wise; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PAH; dibenzopyrene; benzo a pyrene; standard reference material; air particulate matter; diesel particulate matter; toxic equivalence factor; ultrasonic assisted extraction; accelerated solvent extraction; automation; online coupling; GC MC; LC GC MS; Analytical chemistry; Analytisk kemi; Analytical Chemistry; analytisk kemi;

   Sammanfattning : Air pollution with particulate matter (PM) raises considerable concern because of its adverse effects on human health. For this reason, and because the mechanisms of PM toxicity are not fully known, there is an urgent need to determine the chemical constituents of atmospheric PM, especially PM emanating from traffic - a major source of urban PM. LÄS MER