Sökning: "trace gas method"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden trace gas method.

  1. 1. Measuring the [C II]-to-H I connection in high-redshift absorption-selected galaxies

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Gaurav Senthil Kumar; [2022]
    Nyckelord :QSO; Quasar; Black Hole; AGN; Active Galactic Nuclei; DLA; Damped Lyman Alpha; C II; [C II]; H I; Sightline; HST; X-shooter; Spectroscopy; Echelle Spectroscope; Hyperfine transition; Hyperfine; Physics and Astronomy;

    Sammanfattning : HI neutral gas is the basic building block of galaxies. It dictates the star formation rate and hence the metal enrichment rates within high redshift galaxies. HI neutral gas cannot be directly observed beyond z ≈ 0. LÄS MER

  3. 2. SPME Method for Chemical Analysis of Heavy Organic Trace Compounds in Synthesis Gas

    Kandidat-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Constancia Felise Elemia Freire; Simon Edin; Chang Ho Lee; [2020]
    Nyckelord :;

    Sammanfattning : There currently exists no commercialized method for rapid sampling and analysis of trace tar ingas streams. Solid phase microextraction (SPME) with a polydimethylsiloxane (PDMS) solidphase has been previously investigated as a possible candidate due to its solvent-free natureand reusability. LÄS MER

  4. 3. Potential till energiutvinning från deponigas på Tagenedeponin norr om Göteborg

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Erik Johansson; [2020]
    Nyckelord :Deponigas; Diffusa Utsläpp; Energiutvinning; Avfallshantering; Nedbrytningsmodellering; Kemiteknik; Chemical engineering; Technology and Engineering;

    Sammanfattning : When organic material is deposited at a landfill it is decomposed over time by microorganisms to form a gas mixture consisting of mainly methane, carbon dioxide and nitrogen called landfill gas. To limit the environmental impact from this gas there is a requirement in Sweden today that all landfills which have accepted or are accepting organic material to be equipped with a gas collection system and at least a flare to combust the methane. LÄS MER

  5. 4. Influence of the Martian regolith on the atmospheric methane and water vapour cycle

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Julian Weinmann; [2019]
    Nyckelord :Mars; methane; water; diffusion; regolith; adsorption; general circulation model; simulation;

    Sammanfattning : Context. The Martian methane and water cycle are subject of ongoing research through simulation. Exchange with the subsurface has a potentially strong impact, but is often neglected. Aims. LÄS MER

  7. 5. Energianvändning för driftsatta ventilationsaggregat med värmeåtervinning

    M1-uppsats, KTH/Byggteknik och design

    Författare :Peter Nordbåge; Anton Engwall; [2018]
    Nyckelord :energy usage; heat recovery efficiency; SFP; ventilations system; trace gas method; air assemblies; energianvändning; temperaturverkningsgrad; SFP; FTX-aggregat; ventilationssystem; spårgasmetod;

    Sammanfattning : I dagens samhälle ligger stort fokus på energianvändningen för bostäder och kommersiella fastigheter. Energianvändningen beskriver inte bara en byggnads energibehov, utan också miljö- och ekonomiska aspekter. LÄS MER