Search for dissertations about: "temperature programmed desorption"

Showing result 1 - 5 of 15 swedish dissertations containing the words temperature programmed desorption.

  1. 1. Astrochemical Surface Science: Water Desorption from Nanostructured Graphite

    Author : Anna Clemens; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; intercalation; temperature programmed desorption; diffuse reflection; geometrical resonances; water ice; ultra high vacuum;

    Abstract : To date, around 180 different molecules have been identified in the interstellar medium (ISM). Some of them form molecular ices on cold interstellar dust grain surfaces. An interstellar dust grain particle is in the order of nanometres in size and is usually composed of a carbonaceous or silicatious grain core. READ MORE

  2. 2. Reactions on nanostructured and microporous surfaces

    Author : Anna Clemens; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Cu-CHA; XRD; solid-state ion-exchange; materials characterisation; electron microscopy; NH3-SCR; zeolites; catalysis; nanostructured graphite; Water ice; DRIFTS; XPS; NOx reduction; Cu-SSZ-13; temperature programmed desorption; ultra-high vacuum; intercalation; UV-Vis spectroscopy;

    Abstract : Interactions between surfaces and molecules play a central role in various fields where catalysis is one example. In order to understand different surface processes, physicochemical characterisation of the surface materials and molecules is required. READ MORE

  3. 3. Partial Oxidation of Methane over Functionalised Zeolites and Zeotypes

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Xueting Wang; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; FTIR; Heterogeneous catalysis; Copper boron silicate; Zeolite; Natural gas; Biogas; Green methanol; zeotype; Temperature-programmed desorption; Cu-SSZ-13; Cu-ZSM-5; In situ infrared spectroscopy;

    Abstract : Partial oxidation of methane to methanol is an industrially important process that allows natural gas and biogas to be utilised for methanol-based production of chemicals or converted to liquid methanol fuel, which make transportation more facile. In this thesis, the activity for partial oxidation of methane to methanol over copper functionalised zeolites and silica supported copper is investigated using a three-step quasi-catalytic approach including catalyst activation, methane reaction and methanol extraction by water. READ MORE

  4. 4. NOx Adsorption and Transport in ZSM-5 Films

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Indra Perdana; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wicke-Kallenbach cell; mathematical modelling; NOx adsorption and transport; adsorbed species; ZSM-5 films; permeation;

    Abstract : The present work dealt with a fundamental study of NOx adsorption-desorption and transport in ZSM-5 as films supported on cordierite monolith and as a part of composite membranes. The adsorption-desorption study was focused on developing a mechanistic understanding of NOx adsorption in ZSM-5 films including the effects of counter-ions, Si/Al ratios and film thicknesses on the adsorption. READ MORE

  5. 5. NOx Adsorption in ZSM-5 Films - Experimental studies and mathematical modeling

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Indra Perdana; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ZSM-5 films; NOx adsorption; adsorbed species; mathematical modeling.;

    Abstract : This work dealt with studies of NOx adsorption in films of ZSM-5. The study was interesting due to its significant contribution to develop a detailed understanding of NOx transport and adsorption in ZSM-5 which is of interest for catalyst or membrane applications. READ MORE