Browsing Institutt for kjemisk prosessteknologi by Title
Now showing items 1759-1775 of 1775
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VLE measurement and modelling of absorbents for absorption of CO2
(Master thesis, 2017)Two promising solvents were studied for possible use as absorbents in CO2 post combustion capture. The two solvents tested were 3-(Diethylamino)-1,2-propanediol (DEA-12-PD) and 1-(2-Hydroxyethyl)piperidine (12-HEPP). A ... -
VLE Measurements and Verification of a state-of-the-art Helmholtz Energy Equation of State for the Ternary Mixture of CO2-N2-CH4
(Master thesis, 2019)CO2 kan fanges i stor skala fra store punktkilder som kraftverk og/eller karbonintensiv industri. Når CO2-en fanges vil den ikke være ren, men inneholde flere forskjellige forurensninger i ulike konsentrasjoner avhengig ... -
Water as key to activity and selectivity in Co Fischer-Tropsch synthesis: γ-alumina based structure-performance relationships
(Journal article; Peer reviewed, 2018)Thirteen γ-alumina supports with different pore sizes and pore size distributions have been impregnated with cobalt and rhenium. The catalysts were tested for Fischer-Tropsch synthesis (FTS) under dry and enhanced water ... -
The water assisted vinylene mechanism for cobalt Fischer-Tropsch synthesis assessed by multi-catalyst modelling of kinetics and deactivation
(Peer reviewed; Journal article, 2022)The paper describes development of a mechanism and a consistent rate expression for Fischer-Tropsch (FT) synthesis over cobalt-based catalysts. The developed mechanism relies on a two-step hydrogen assisted activation of ... -
Water-lean solvents for biogas upgrading
(Doctoral theses at NTNU;2020:298, Doctoral thesis, 2020)Biogas upgrading consists in the removal of CO2 from biogas, a process which produces a highly purified biomethane stream. As such, biogas upgrading has a double positive impact when considering climate change mitigation ... -
Water–Gas Shift Activity of Pt Catalysts Prepared by Different Methods
(Peer reviewed; Journal article, 2020)Platinum supported on ceria and zirconia was prepared through different preparation methods: Coprecipitation (CP), spray drying (SD), and flame spray pyrolysis (FSP). The catalysts were characterized by XRD, TPR, N2 ... -
Wax-Inhibitor Interactions Studied by Isothermal Titration Calorimetry and Effect of Wax Inhibitor on Wax Crystallization
(Journal article; Peer reviewed, 2017)Isothermal titration calorimetry is applied to investigate the interactions of polymeric pour-point depressants (PPDs) or asphaltenes with macrocrystalline wax in a model oil system. This represents a novel approach to ... -
Wet Drilled Cuttings Bed Rheology
(Peer reviewed; Journal article, 2021)The cuttings transport efficiency of various drilling fluids has been studied in several approaches. This is an important aspect, since hole cleaning is often a bottleneck in well construction. The studies so far have ... -
Wet-granular rheology to measure cuttings-bed strength
(Journal article; Peer reviewed, 2021) -
Wettability effect on oil recovery using rock-structured microfluidics
(Peer reviewed; Journal article, 2022)Surface wettability has a crucial impact on drop splashing, emulsion dynamics, slip flow for drag reduction, fluid–fluid displacement, and various microfluidic applications. Targeting enhanced oil recovery (EOR) applications, ... -
Wood-based nanocellulose and bioactive glass modified gelatin-alginate bioinks for 3D bioprinting of bone cells
(Peer reviewed; Journal article, 2019)A challenge in the extrusion-based bioprinting is to find a bioink with optimal biological and physicochemical properties. The aim of this study was to evaluate the influence of wood-based cellulose nanofibrils (CNF) and ... -
X-ray absorption, X-ray diffraction and electron microscopy study of spent cobalt based catalyst in semi-commercial scale Fischer-Tropsch synthesis
(Peer reviewed; Journal article, 2014)Calcined, reduced and spent Co-Re/γ-Al2O3 catalysts for Fischer–Tropsch synthesis (FTS) were characterized and compared. Co-K-edge and Re-LIII-edge X-ray absorption near edge structure (XANES), X-ray powder diffraction ... -
Yield-increasing additives in kraft pulping: Effect on carbohydrate retention, composition and handsheet properties
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:137, Doctoral thesis, 2008) -
Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming
(Journal article; Peer reviewed, 2018)Yttrium modified Ni-based double-layered hydroxides were tested as novel catalysts in dry methane reforming. The catalysts were characterized by XRF, BET analysis, XRD, TPR-H2, TPD-CO2, TGA/DSC-MS, H2 chemisorption and ... -
Zirconia-Supported Catalysts for Oxidation of NO to NO2 in the Production of Nitric Acid
(Master thesis, 2021)Salpetersyre er et viktig kjemisk produkt som hovedsakelig blir brukt til å produsere kunstgjødsel av nitrater. Den industrielle prosessen for framstilling av salpetersyre foregår i tre hovedtrinn, kald Ostwaldprosessen. ... -
ZnO-Carbon-Nanotube Composite Supported Nickel Catalysts for Selective Conversion of Cellulose into Vicinal Diols
(Journal article; Peer reviewed, 2015)A ZnO-nanolayer-coated carbon nanotube (CNT) composite (ZnO–CNT) was employed as a support to immobilise Ni catalysts. Well-mixed oxides, formed as a result of enhanced interfaces between the two oxides on CNTs, resulted ... -
α-alumina as catalyst support in Co Fischer-Tropsch synthesis and the effect of added water; encompassing transient effects
(Peer reviewed; Journal article, 2019)Three catalyst supports containing from 84 to 100% α-alumina prepared by heat treatment of γ-alumina have been impregnated with cobalt and rhenium. The catalysts were tested for Fischer-Tropsch synthesis (FTS) under dry ...