Browsing Institutt for kjemisk prosessteknologi by Title
Now showing items 165-184 of 1777
-
Carbon Formation Mechanisms on Co Surfaces: A DFT Study
(Master thesis, 2021)Fisher-Tropsch syntesen (FTS) er en katalytisk prosess hvor syngas omdannes til vann og hydrokarboner som for eksempel lange kjeder av alkaner, alkener og oksygenater. Interessen for FTS har økt på grunn av den økende ... -
Carbon formation phenomena and the initial stage of metal dusting corrosion –an experimental investigation
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:27, Doctoral thesis, 2014)Metal dusting corrosion is high temperature degradation of metals and alloys into dust-like fine particles. It is often encountered in petrochemical industry, where metals and alloys extensively exposed to carbon containing ... -
Carbon hollow fiber membranes for a molecular sieve with precise-cutoff ultramicropores for superior hydrogen separation
(Peer reviewed; Journal article, 2021)Carbon molecular sieve (CMS) membranes with rigid and uniform pore structures are ideal candidates for high temperature- and pressure-demanded separations, such as hydrogen purification from the steam methane reforming ... -
Carbon Looping for Metallurgical Processes via Boudouard reaction over Magnetite
(Master thesis, 2020)Utvikling av en effektiv og økonomisk gunstig teknologi for reduksjon av CO2 utslipp i metallindustrien er et mål for å oppnå et fremtidig lav-utslipp samfunn. Karbotermisk reduksjon av metalloksider produserer en ovngass ... -
Carbon Membranes for CO2 Removal: Status and Perspectives from Materials to Processes
(Peer reviewed; Journal article, 2020)CO2 removal from gas streams using energy-efficient and environmentally friendly separation technologies can contribute to achieving a low-carbon energy future. Carbon membrane systems for hydrogen purification, post-combustion ... -
Carbon membranes for oxygen enriched air – Part I: Synthesis, performance and preventive regeneration
(Journal article; Peer reviewed, 2018)Chemisorption of oxygen on the active sites of carbon layers limits the use of carbon membranes in air separation application. A novel online electrical regeneration method was applied to prevent the active sites on carbon ... -
Carbon membranes for oxygen enriched air – Part II: Techno-economic analysis
(Journal article; Peer reviewed, 2018)Carbon membrane (CM) separation process for producing oxygen-enriched air (OEA) at a concentration of 50–78 mol% O2 in a single stage process with no recycle stream has been investigated. This paper (Part II of a two-part ... -
Carbon Molecular Sieve Hollow Fiber Membranes for CO2 Removals
(Doctoral theses at NTNU;2020:401, Doctoral thesis, 2020)New technologies that are more energy efficient could, if applied in the large-scale CO2 removal process, reduce carbon dioxide emissions, and achieve a low-carbon future. Compared to traditional amine-based absorption, ... -
Carbon molecular sieve membranes for biogas upgrading: Techno-economic feasibility analysis
(Journal article; Peer reviewed, 2018)Biomethane, produced by biogas upgrading, has a great potential to replace part of the fossil fuel natural gas, and may be injected into a gas grid or used as compressed biomethane as vehicle fuel. The state-of-the-art ... -
Carbon Molecular Sieve Membranes for Hydrogen Purification from a Steam Methane Reforming Process
(Peer reviewed; Journal article, 2021)Asymmetric carbon molecular sieve (CMS) membranes prepared from cellulose hollow fiber precursors were investigated for H2/CO2 separation in this work. The prepared carbon membrane shows excellent separation performance ... -
Carbon molecular-sieve membranes developed from a Tröger's base polymer and possessing superior gas-separation performance
(Journal article; Peer reviewed, 2023)Carbon molecular-sieve membranes possess tremendous practical advantages over unary polymer membranes by providing high gas-separation performance levels, coupled with excellent mechanical and chemical stability. Improving ... -
Carbon nanotubes (CNT) for enhanced oil production from shales
(Master thesis, 2014)The shale gas production has brought a revolution in US energy market and the global prospect of shale gas production is on continuous increase. The advancements in hydraulic fracturing made it possible to extract very low ... -
Carbon-resistant NiO-Y2O3-nanostructured catalysts derived from double-layered hydroxides for dry reforming of methane
(Peer reviewed; Journal article, 2021)Yttrium promoted Ni/Mg/Al double-layered hydroxides were prepared through co-precipitation method and calcined at 550 °C for 5 h in order to obtain nanostructured mixed oxides. The catalysts were tested in dry reforming ... -
Catalysis for Control of Methane Slip in Marine Machinery - Using a Palladium based Catalyst
(Master thesis, 2016)In a world distributing more and more liquefied natural gas (LNG), due to it`s advantages within health, environment and energy compared to gasoline and diesel, it is favourable to research more within this area. The main ... -
Catalysis for control of methane slip in marine machinery - Using platinum-based catalysts
(Master thesis, 2016)Greenhouse gas abatement in the shipping industry has become increasingly relevant in the recent years, due to stricter laws and regulations. The use of ships running on liquid natural gas is thus growing rapidly in the ... -
Catalysis in microstructured reactors - short review on smallscale syngas production and further conversion into methanol, DME and Fischer-Tropsch products
(Journal article; Peer reviewed, 2017)Synthesis gas production and further conversion via the Fischer-Tropsch, methanol and dimethyl ether (DME) syntheses is currently economic only in the large scale. Compact, modular, and safe technology efficient in smaller ... -
Catalyst Deactivation During One-Step Dimethyl Ether Synthesis from Synthesis Gas
(Journal article; Peer reviewed, 2017)Catalysts for direct synthesis of dimethyl ether (DME) from synthesis gas should essentially contain two functions, i.e., methanol synthesis and methanol dehydration. In the present work, the deactivation of both functions ... -
Catalyst Development of Ethylene Oxychlorination to Ethylene Dichloride and Vinyl Chloride
(Doctoral theses at NTNU;2023:372, Doctoral thesis, 2023)Vinyl chloride monomer (VCM) is a critical component in the production of polyvinyl chloride (PVC), one of the most extensively used plastic polymers, through the polymerization process. The global VCM industry capacity ... -
Catalyst formulations for use in microstructured reactors for conversion of synthesis gas to liquids
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:15, Doctoral thesis, 2011)Potential natural gas reserves in the world are more than 6000 trillion cubic feet. However, approximately 25% of these gas reserves are located offshore with no economic feasibility to be produced, transported and sold. ... -
Catalysts for electrochemical conversion of CO2 in aqueous solutions
(Doctoral theses at NTNU;2017:82, Doctoral thesis, 2017)An artificial photosynthesis process can 1) utilise renewable energy from the sun, 2) facilitate convenient energy storage in chemical bonds, 3) supply feed-stock to the chemical industry, and 4) recycle CO2 in a CO2-neutral ...