Browsing Institutt for kjemisk prosessteknologi by Title
Now showing items 359-378 of 1754
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Data-Driven Control Strategies: From MPC to Reinforcement Learning
(Doctoral theses at NTNU;2024:42, Doctoral thesis, 2024)This thesis presents a comprehensive investigation into the integration of machine learning techniques to enhance the performance and applicability of Model Predictive Control (MPC). The main focus is on addressing challenging ... -
Data-driven modelling of subsea equipment degradation using simulated and experimental case studies
(Master thesis, 2021)I all industri finnes det visse essensielle komponenter som utsettes for slitasje fra flere ulike kilder. I denne oppgaven studeres spesifikt erosjonen fra sand i den sakalte stru- ˚ peventilen (”choke valve”) i et subsea ... -
Data-Driven Robust Optimal Operation of Thermal Energy Storage in Industrial Clusters
(Peer reviewed; Journal article, 2020)Industrial waste heat recovery is an attractive option having the simultaneous benefits of reducing energy costs as well as carbon emissions. In this context, thermal energy storage can be used along with an optimal operation ... -
Data-driven Scenario Selection for Multistage Robust Model Predictive Control
(Journal article; Peer reviewed, 2018)A main assumption in many works considering multistage model predictive control (MPC) is that discrete realizations of the uncertainty are chosen a-priori and that the scenario tree is given. In this work, we focus on ... -
Data-Driven Virtual Flow Metering using Neural Networks
(Master thesis, 2022)Forutsigelse av strømningshastighet er en avgjørende prosess i olje- og gassindustrien, spesielt der flerfasestrømmer er involvert. Det finnes noen få metoder for å vurdere flerfasestrømningshastigheter som imidlertid er ... -
Deactivation of Co-Based Fischer−Tropsch Catalyst by Aerosol Deposition of Potassium Salts
(Journal article; Peer reviewed, 2018)A 20%Co/0.5%Re/γAl2O3 Fischer−Tropsch catalyst was poisoned by four potassium salts (KNO3, K2SO4, KCl, and K2CO3) using the aerosol deposition technique, depositing up to 3500 ppm K as solid particles. Standard characterization ... -
Deactivation of cobalt based Fischer-Tropsch synthesis catalysts
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:304, Doctoral thesis, 2011) -
Decoding atomic-level structures of the interface between Pt sub-nanocrystals and nanostructured carbon
(Journal article; Peer reviewed, 2018)Gaining an insight into the interface structure resulting from the interaction between metal nanoparticles and their supports, particularly under relevant reaction conditions, has been an important topic in heterogeneous ... -
Decomposition of nitrosamines in aqueous monoethanolamine (MEA) and diethanolamine (DEA) solutions with UV-radiation
(Journal article; Peer reviewed, 2014)CO2 capture based on chemical absorption using amine solutions is considered to be the most feasible way to remove CO2 from low pressure sources. However, amines, when exposed to nitrous oxides, may form nitrosamines which ... -
Decoupling the effect of membrane thickness and CNC concentration in PVA based nanocomposite membranes for CO2/CH4 separation
(Journal article; Peer reviewed, 2018)The effect of the viscosity of the casting suspension on membrane morphology and thickness has been investigated for polyvinyl alcohol (PVA)/crystalline nanocellulose (CNC) nanocomposite membranes used for CO2/CH4 separation. ... -
Decrystallization of Lignocellulosic Biomass using Ionic Liquids
(Master thesis, 2012)This thesis is written in fulfilment of the requirements for a Master in Science at the Norwegian University of Science and Technology (NTNU), Department of Chemical Engineering. The work investigates the effectiveness of ... -
Deep Reinforcement Learning in Real-Time Optimization
(Master thesis, 2022)Forsterkningslæring er et område innen maskinlæring som tiltrekker seg oppmerksomhet grunnet egenskaper til å løse komplekse problemer. Læring gjennom å prøve-og-feile er den grunnleggende idéen, der problemet formuleres ... -
Degradation and corrosion inhibitors for MEA-based CO2 capture plants
(Journal article; Peer reviewed, 2016)In amine based post-combustion CO2 capture and storage, solvent degradation and corrosion of steel materials are the main operational challenges. In this paper the focus was on minimizing degradation and corrosion by ... -
Degradation behaviour of fresh and pre-used ethanolamine
(Peer reviewed; Journal article, 2023)The oxidative degradation of previously used ethanolamine from three different CO2 capture pilot plants was studied in a laboratory-scale degradation setup. Different solvents behave differently under the same experimental ... -
Degradative behavior and toxicity of alkylated imidazoles
(Journal article; Peer reviewed, 2020)The thermal and oxidative degradation behavior and the corrosiveness of imidazole (Im), 2-methylimidazole (2MIm), 2-ethyl-4-methylimidazole (2E4MIm), 2,4,5-trimethylimidazole (2,4,5MIm), and 1,2,4,5-tetramethylimidazole ... -
Dehydration and Compression of Contaminated CO2-rich Gas
(Master thesis, 2011)The use and demand of energy by exploiting fossil fuels is increasing. Carbon Capture and Storage (CCS) may be the solution to achieve decreased emissions, from various emitters of climate gases such as carbon dioxide. By ... -
Dehydrogenation of propane by carbon supported metal catalysts
(Master thesis, 2013)In this thesis, the catalytic properties of carbon supported Pt catalysts were investigated for the dehydrogenation of propane.Using a polyol process, Pt/Carbon catalysts active for propane dehydrogenation were successfully ... -
Dehydrogenation of propane by carbon supported metal catalysts
(Master thesis, 2013)In this thesis, the catalytic properties of carbon supported Pt catalysts were investigated for the dehydrogenation of propane. Using a polyol process, Pt/Carbon catalysts active for propane dehydrogenation were successfully ... -
Demonstration of non-linear model predictive control for optimal flexible operation of a CO2 capture plant
(Peer reviewed; Journal article, 2022)Due to the penetration of renewable intermittent energy, there is a need for coal and natural gas power plants to operate flexibly with variable load. This has resulted in an increasing interest in flexible and operational ... -
Demonstration of non-linear model predictive control of post-combustion CO2 capture processes
(Journal article; Peer reviewed, 2019)Nonlinear model predictive control applications have been deployed on two large pilot plants for post combustion CO2 capture. The control objective is formulated in such a way that the CO2 capture ratio is controlled at a ...