Browsing NTNU Open by Title
Now showing items 44756-44775 of 101539
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Hydrogen gas explosions in pipelines - modeling and experimental investigations
(Doktoravhandlinger ved NTNU, 1503-8181; 2007::14, Doctoral thesis, 2007)Gas explosions in closed pipes with a single obstacle have been investigated both numerically and experimentally. Most of the work is related to hydrogen and air mixtures, but other fuels have also been used. At the present ... -
Hydrogen Hydrate Promoters for Gas Storage—A Review
(Peer reviewed; Journal article, 2023)Clathrate and semi-clathrate hydrates have recently been gaining major interest as hydrogen storage material. The benefits of hydrates, such as reversible formation and dissociation, their environmentally friendly nature, ... -
Hydrogen in the maritime
(Book, 2021)Hydrogen in the maritime is a deliverable under IEA TCP Hydrogen and investigates the use of hydrogen as a fuel in shipping. -
Hydrogen Induced Stress Cracking of Additive Manufactured Components made from Alloy 625 and 25Cr Super Duplex Stainless Steel
(Master thesis, 2022)Denne masteroppgaven har som mål å bidra til økt forståelse rundt hvordan 3D-printede komponenter produsert ved selektiv lasersmelting (SLM) blir påvirket av hydrogensprøhet (HISC). Både 25Cr super duplex rustfritt stål ... -
Hydrogen induced stress cracking of alloy 718: Effects of chemical composition and microstructure
(Master thesis, 2014)This master thesis have examined the effect of variations in composition and microstructure on the HISC susceptibility of Inconel-718. 6 different Inconel-718 variants with different compositions and heat treatments were ... -
Hydrogen Induced Stress Cracking of Inconel 625 - Effect of Production Method, Heat Treatment and Cold Working
(Master thesis, 2016)The following work has examined the effect of heat treatment, production method and cold working (CW) on the hydrogen induced stress cracking (HISC) susceptibility of Inconel 625 (UNS N06625). This was done by hydrogen ... -
Hydrogen Induced Stress Cracking of Inconel 718 under Cathodic Polarization - Effects of Hydrogen on the Initiation and Propagation of Cracks
(Master thesis, 2015)This work has examined the susceptibility to hydrogen induced stress cracking (HISC) of Inconel 718 (UNS N07718) by stepwise tensile loading tests with in situ cathodic polarization. Specifically, the effect of hydrogen ... -
Hydrogen Induced Stress Cracking of Spheroidal Graphite Cast Iron
(Master thesis, 2020)Abstract will be available on 2023-06-17 -
Hydrogen Induced Stress Cracking Resistance of Nickel Alloy ATI 830
(Master thesis, 2018)The following activities shall be included in the project: ATI 830 1. Document microstructure and mechanical properties for the received alloy. 2. Execute the test program given in Attachment 1. 3. Execute a literature ... -
Hydrogen Induced Stress Cracking susceptibility of strain-hardened Ni alloys Sanicro 35 and Alloy 750 HS
(Master thesis, 2023)I dette arbeidet er mottakeligheten for hydrogenindusert sprekking (HISC) blitt undersøkt og sammenlignet for to arbeidsherdede nikkelbaserte legeringer, Sanicro 35 (UNS N08935) og høystyrket P750 (DIN nr. 1.4675). Dette ... -
Hydrogen informed Gurson model for hydrogen embrittlement simulation
(Journal article; Peer reviewed, 2019)Hydrogen-microvoid interactions were studied via unit cell analyses with different hydrogen concentrations. The absolute failure strain decreases with hydrogen concentration, but the failure loci were found to follow the ... -
Hydrogen permeation in 13% Crsuper martensitic stainless steel and API X70 pipeline steel
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:208, Doctoral thesis, 2010)Hydrogen permeation measurements have been carried out on 13% Cr super martensitic stainless steel (SMSS), API X70 steel and type HBQ Coreweld under cathodic charging conditions at temperatures from 5°C to 80°C. In addition, ... -
Hydrogen permeation in different microstructures of 66SiMnCrMo6-6-4 steel
(Master thesis, 2023)Diffusiviteten til hydrogen i stål er bestemmes av ulike mekanismer som forårsaker sprøhet. Avhengig av mikrostrukturen kan hydrogensprøhet være forårsaket av mange typer mekanismer, som derfor gjør det utfordrende å forutsi ... -
Hydrogen Porosity in Al-Si Foundry Alloys
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:3, Doctoral thesis, 2010)Aluminium alloys based on the aluminium-silicon system are popular for automotive and aerospace applications, thanks to their high strength to weight ratio, excellent castability, and corrosion resistance. Microporosity ... -
Hydrogen production by catalytic partial oxidation of methane
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:327, Doctoral thesis, 2008)Hydrogen production by catalytic partial oxidation of natural gas was investigated using tools ranging from theoretical calculations to experimental work and sophisticated characterization techniques. Catalytic partial ... -
Hydrogen production by water splitting using gas switching technology
(Peer reviewed; Journal article, 2020)This study demonstrates a novel“Gas Switching Water Splitting (GSWS)”technology for production of pure H2with integrated CO2capture. The reactor concept is based on the chemical looping technology where an oxygencarrier ... -
Hydrogen production combining Steam Methane Reforming with Cryogenic Carbon Capture
(Master thesis, 2023)Formålet med denne rapporten var å utføre et litteratursøk og simulering av produksjon av hydrogen ved dampmetanreformering med kryogen karbonfangst, for så å skape en modell som beskriver prosessen. En modell for ... -
Hydrogen production from biomass derived compounds by sorption enhanced reforming
(Master thesis, 2013)Sorption enhance steam reforming (SESR) is a technique which involves the integration of three reactions in one stage; namely steam reforming (SR), water gas shift (WGS) and CO2 sorption This project was developed to study ... -
Hydrogen production from methanol partial oxidation through the catalyst prepared using torrefaction liquid products
(Peer reviewed; Journal article, 2020)This study developed a novel application of torrefaction liquid products (TLPs) for acidic catalyst sol-gel synthesis of SiO2 from tetraethyl orthosilicate (TEOS) to improve the thermal stability of Al2O3 catalyst supporter. ... -
Hydrogen Production from Wind and Hydro Power in Constrained Transmission Grids
(Doctoral theses at NTNU;2022:54, Doctoral thesis, 2022)Hydrogen (H2) production from variable renewable energy (VRE) sources can be an important technology for reducing CO2 emissions. Integrating electrolytic H2 production into the electricity system can contribute to this ...