Browsing Institutt for kjemisk prosessteknologi by Title
Now showing items 1735-1754 of 1783
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Understanding the mechanism of CO2 reforming of methane to syngas on Ni@Pt surface compared with Ni(1 1 1) and Pt(1 1 1)
(Peer reviewed; Journal article, 2020)CO2 reforming of methane (DRM) is a promising reaction for the carbon cycle in nature. Ni was found to be active in this process. However, single component Ni catalysts cannot meet the stability, activity and selectivity ... -
Undersøkelse over "konkurrerende vekst" ved seed-polymerisasjon av vinylklorid
(Master thesis, 1970)Det ble i dette arbeidet studert den relative veksten av to partikkelstørrelser ved emulsjonspolymerisasjon av vinylklorid (seedpolymerisasjon). Det ble benyttet partikler med diametere omkring 1000 og 2000 Å. Det totale ... -
Uniaxial Néel vector control in perovskite oxide thin films by anisotropic strain engineering
(Peer reviewed; Journal article, 2021)Antiferromagnetic (AF) thin films typically exhibit a multidomain state, and control of the AF Néel vector is challenging, as AF materials are robust to magnetic perturbations. In this paper, uniaxial Néel vector control ... -
Unifying Transport Phenomena and Thermodynamic Equilibrium Models: A theoretical study of current and novel equilibrium based models in transport phenomena
(Doctoral theses at NTNU;2023:87, Doctoral thesis, 2023)Transport phenomena are based on the conservation of mass, momentum, and energy, and provide equations that give insight into the motion of fluids, the driving force behind this motion, and the dissipation of such driving ... -
Unleash electron transfer in C-H functionalization by mesoporous carbon-supported palladium interstitial catalysts
(Peer reviewed; Journal article, 2021)The functionalization of otherwise unreactive C–H bonds adds a new dimension to synthetic chemistry, yielding useful molecules for a range of applications. Arylation has emerged as an increasingly viable strategy for ... -
Unraveling catalytic properties by yttrium promotion on mesoporous SBA-16 supported nickel catalysts towards CO2 methanation
(Peer reviewed; Journal article, 2021)The ordered mesoporous silica SBA-16 with high specific surface area and pore volume was synthesized and used to prepare Ni/SBA-16 catalysts promoted with yttrium. These promoted catalysts were tested in CO2 methanation ... -
Unraveling Enhanced Activity, Selectivity, and Coke Resistance of Pt–Ni Bimetallic Clusters in Dry Reforming
(Journal article; Peer reviewed, 2021)By introducing Pt atoms into the surface of reduced hydrotalcite (HT)-derived nickel (Ni/HT) catalysts by redox reaction, we synthesized an enhanced active and stable Ni-based catalyst for methane dry reforming reaction. ... -
Using a neural network for estimating plant gradients in real-time optimization with modifier adaptation
(Journal article; Peer reviewed, 2019)In the presence of structural plant-model mismatch, standard real-time optimization (RTO) schemes are prone to compute an operation point that does not coincide with the plant optimum. Modifier Adaptation (MA) methods are ... -
Utvikling av prosedyre for overvåking av nikkel og kobolt i avløpsvann fra metallurgisk industri
(Master thesis, 2014)Muligheten for å bruke differensialpuls anodisk stripping voltammetri (DPASV) for samtidig bestemmelse av nikkel (II)- og kobolt (II)-konsentrasjonen i avløpsvannet fra Glencore Nikkelverk er blitt undersøkt. En polykrystallinsk ... -
UV degradation of natural and synthetic microfibers causes fragmentation and release of polymer degradation products and chemical additives
(Peer reviewed; Journal article, 2020)A high proportion of the total microplastic (MP) load in the marine environment has been identified as microfibers (MFs), with polyester (PET) and polyamide (PA) typically found in the highest abundance. The potential for ... -
Valorization of lignocellulosic waste (Crotalaria juncea ) using alkaline peroxide pretreatment under different process conditions: An optimization study on separation of lignin, cellulose, and hemicellulose
(Peer reviewed; Journal article, 2018)Lignocellulose materials, essentially consisting of lignin, cellulose and hemicelluloses, are abundant sources of fermentable sugars. The bast fiber of Crotalaria juncea (Sunn hemp), a native cover crop of India, was used ... -
Vapor Liquid Equilibrium (VLE) in H2O-Amine-CO2 system
(Master thesis, 2012)New experimental data for vapor-liquid equilibrium of CO2 in aqueous solutions of 3M/26.84% wt, 1M/9% wt and 0.1M/0.89% wt AMP (2-amino-2-methyl-1-propanol) and 1.5M PZ are reported from 313 to 393K. Low pressure/temperature ... -
Vapor Liquid Equilibrium Measurements of Two Promising Tertiary Amines for CO2 Capture
(Journal article; Peer reviewed, 2019)Post combustion CO2 capture is still a rather energy intense, and therefore expensive, process. Much of the current research for reducing the process energy requirements is focused on the regeneration section. A good ... -
Vapor liquid equilibrium of pure and aqueous Methyl diethanolamine (MDEA), 2-Dimethylmonoethanolamine (DMMEA), N-Methylmonoethanolamine (MMEA) and 1-(2-Aminoethyl)piperazine (AEP): Experimental results and modeling
(Peer reviewed; Journal article, 2023)This work presents new vapor-liquid data for the pure components 2-dimethylmonoethanolamine (DMMEA) and N-methylethanolamine (MMEA) and for the binary systems of aqueous methyldiethanolamine (MDEA), DMMEA, MMEA, and ... -
VAPOR-LIQUID EQUILIBRIA OF BICARBONATE FORMING SOLVENTS FOR POST-COMBUSTION CO2 CAPTURE: EXPERIMENTAL AND MODELING
(Master thesis, 2015)Bicarbonate forming solvents have been proposed in the literature as promising solvents for capturing CO2 in flue gases due to their high CO2 loading capacities and low heats of absorption. Key solvent properties are ... -
Vapor-Liquid equilibrium in DEEA/H2O/CO2 system; Experiments and modeling
(Master thesis, 2011)Experiment data for vapor-liquid equilibrium (VLE) of CO2 were conducted for DEEA 5M and 2M.The study was performed in two VLE apparatuses from 40 to 120 °C with atmospheric VLE apparatus and high pressure VLE apparatus. ... -
Vapor–liquid equilibria data for 2-piperidineethanol and 1-(2-hydroxyethyl)pyrrolidine in aqueous solutions and a UNIQUAC model representation
(Peer reviewed; Journal article, 2022)This work reports equilibrium data for two amines, 2-piperidineethanol (2-PPE) and 1-(2-hydroxyethyl)pyrrolidine (1-(2HE)PRLD), and their aqueous solutions. The pressure, temperature, and composition data are used to ... -
Vapour-liquid equilibria in pure N-Methyl-1,3-diaminopropane (MAPA), 1,3-diaminopropane (DAP), 2-(Isopropylamino)ethanol (IPAE), N-tert-Butyldiethanolamine (N-TBDEA) and their aqueous solutions
(Journal article; Peer reviewed, 2020)New energy effective solvents are in demand to make global CO2 capture feasible. Phase change solvents seem to be one avenue to reach this goal. This paper presents new experimental data and modelling results for four ... -
Vapour-liquid equilibrium in the monoethylene glycol - methane system at elevated pressures
(Master thesis, 2012)A range of different chemicals are used in natural gas processing. The systems operate in closed loops, but a small amount of the chemicals are lost due to the solubility of the chemical in the gas phase. This leads to ... -
Vapour-liquid equilibrium study of tertiary amines, single and in blend with 3-(methylamino)propylamine, for post-combustion CO2 capture
(Peer reviewed; Journal article, 2019)