Essays about: "air ions"

Showing result 1 - 5 of 13 essays containing the words air ions.

1. 1. Characterisation of Ionic Liquid doped Polybenzimidazole Membranes for Application in High-Temperature Proton Exchange Membrane Fuel Cells

   University essay from Lunds universitet/Kemiteknik (CI)

   Author : Adam Jacobsson Trönndal; [2023]
   Keywords : Fuel cells; Phosphoric acid; Polybenzimidazole; PA-PBI; Ionic liquid; IL; High temperature proton exchange membrane fuel cell; HT-PEMFC; Electrochemical impedance spectroscopy; EIS; IL-PBI; Chemical engineering; Technology and Engineering;

   Abstract : In this study four membranes were tested and evaluated against each other for use in high-temperature proton exchange membrane fuel cell (HT-PEMFC) applications. A phosphoric acid (PA) doped polybenzimidazole (PBI) membrane, was used as a reference as the current state-of-the-art. READ MORE

3. 2. Developing an Ar milling process to improve the contact quality to InAs nanowires

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

   Author : Chris Mkolongo; [2023]
   Keywords : InAs nanowires; Argon milling; Technology and Engineering;

   Abstract : The aim of this work was to develop a stable and reproducible argon milling process for InAs nanowires to remove the native oxide layer that increases electrical resistance. This was done by identifying a few milling parameters and studying them in relation to the milling rate of silicon dioxide (SiO2). READ MORE

4. 3. Charging behaviour of the amine moiety at the air-water interface. A vibrational sum frequency study

   University essay from KTH/Yt- och korrosionsvetenskap

   Author : Mikael Gullstrand; [2021]
   Keywords : Langmuir monolayers; Vibrational Sum Frequency Spectroscopy; Fatty amine; Monovalent ions; Poisson Boltzmann theory; Langmuirmonolager; Vibrationssumfrekvensspektroskopi; Fettkedjeamin; Monovalenta joner; Poisson-Boltzmann-teori;

   Abstract : Laddningsbeteendet hos amingruppen vid ytgränsskiktet mellan vatten och luft har studerats under ändring av vattenfasens pH och NaCl-koncentration via den ickelinjära laserspektroskopiska tekniken, vibrationssumfrekvensspektroskopi (VSFS). Modellen som användes för ytan bestod av ett Langmuirmonolager av 1-docosanamin, en icke-löslig fettkedjeamin med NH2-gruppen riktad mot vattenfasen. READ MORE

5. 4. Steaming of Wood Chips - Experimental determination of heating times and effect of different parameters

   University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Author : Henrik Broberg; [2019]
   Keywords : ;

   Abstract : The presteaming of wood chips is an important step in the chemical pulping industry. It removes the air from within wood chips, allowing the cooking liquor to better impregnate wood chips, which leads to a more uniform cooking process, and lowers the amount of rejects. READ MORE

6. 5. Making wood durable. A sustainable approachwith linseed oil

   University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Author : Helena Olsson; [2019]
   Keywords : Linseed oil; Wood preservation; Nuclear Magnetic Resonance NMR ; Diffusion Ordered Spectroscopy DOSY ; Time-resolved oxidation study; Linolja; Bevarande träbehandling; Nuclear Magnetic Resonance NMR ; Diffusion Ordered Spectroscopy DOSY ; Oxidationstidsstudie;

   Abstract : Linseed oil has been and is used for vast number of applications, such as in food and paint industry, and wood preservation. It is a good environmental choice, as it originates from renewable sources. Linseed oil is mainly a mixture of triglyceride of fatty acids, both saturated and mono- or polyunsaturated, which allows the oil to oxidize. READ MORE