Sökning: "heterogeneous catalyst"

Visar resultat 1 - 5 av 16 uppsatser innehållade orden heterogeneous catalyst.

  1. 1. Application of Fourier Transforms to time-resolved ambient pressure spectroscopy operando studies of CO oxidation over Pt(111)

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Synkrotronljusfysik

    Författare :Grigore-Leon Ratiu; [2024]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : The study of heterogeneous catalysis has important implications in increasing the efficiency of industrial processes and in reducing the emissions of greenhouse gases from sources such as automobiles. A reaction with high industrial relevance is the oxidation of CO on noble metal catalysts. LÄS MER

  3. 2. Linking the selectivity of varying surface phases of a real palladium catalyst toward specific methane oxidation pathways with Ambient Pressure X-ray Photoelectron Spectroscopy

    Master-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Författare :Ulrike Küst; [2023]
    Nyckelord :APXPS; catalysis; palladium; methane; Physics and Astronomy;

    Sammanfattning : The study of heterogeneous catalysis, especially within methane oxidation, is of high importance in order to more efficiently remove unburned methane from bio-fuel exhausts. This is relevant as bio-fuel engines will replace those driven by fossil fuels in the coming decades. LÄS MER

  4. 3. Heterogeneous catalytic reactions studied with transient gas supply and event-averaged ambient pressure x-ray photoelectron spectroscopy

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/NanoLund: Centre for Nanoscience

    Författare :Qianhui Liu; [2022]
    Nyckelord :Ambient pressure x-ray photoelectron spectroscopy; Event-averaging; Pd 100 surface structure oscillation; Physics and Astronomy;

    Sammanfattning : CO oxidation over Pd(100) is studied with ambient pressure x-ray photoelectron spectroscopy (APXPS). Cyclic gas composition pulsing of the CO:O2 ratio, combined with a new method using software based event-averaging by image recognition over many pulses, is used to improve the signal-to-noise ratio substantially. LÄS MER

  5. 4. Transesterifiering av rapsolja katalyserad av natriumdopad kalciumoxid

    Kandidat-uppsats, KTH/Kemi

    Författare :Ammar Anayi; Christoffer Ottenstedt; Ludvig Jöcker; [2022]
    Nyckelord :Biodiesel; FAME; Heterogen katalys; Katalysator; Rapsolja; Transesterifiering;

    Sammanfattning : The aim of this study was to find and use a heterogeneous catalyst to catalyze the transesterification reaction of biodiesel. The purpose of this is to have a more sustainable production of biodiesel which uses fewer chemicals and can reuse the catalyst easily. LÄS MER

  7. 5. Ethylene to Liquid Hydrocarbons by Heterogeneously Catalyzed Oligomerization on ZSM-5

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Fysikalisk kemi

    Författare :Gustav Halldén; [2022]
    Nyckelord :ethylene; ethane; oligomerization; catalyst; heterogeneous catalysis ZSM-5; zeolite;

    Sammanfattning : The aim is to produce aliphatic liquid hydrocarbons using heterogeneous ethylene oligomerization. Thiscould potentially produce renewable synthetic fuels. Heterogeneous catalysis has some advantages overhomogeneous catalysis regarding some sustainability aspects. LÄS MER