Institutt for kjemisk prosessteknologi
Recent Submissions
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Linear Combination of Gradients as Optimal Controlled Variables
(Peer reviewed; Journal article, 2020)In this paper, we show that optimal economic operation can be achieved using feedback control, by controlling the right variables that translate economic objectives into control objectives. We formulate a generic framework ... -
Synergistic Pt-WO3 Dual Active Sites to Boost Hydrogen Production from Ammonia Borane
(Peer reviewed; Journal article, 2020)Development of synergistic heterogeneous catalysts with active sites working cooperatively has been a pursuit of chemists. Herein, we report for the first time the fabrication and manipulation of Pt-WO3 dual-active-sites ... -
Insight into Size- and Metal-Dependent Activity and the Mechanism for Steam Methane Re-forming in Nanocatalysis
(Peer reviewed; Journal article, 2020)Systematic and in-depth understanding of size- and metal-dependent activity plays a pivotal role in nanocatalysis for rational design of highly efficient catalysts. Herein, we report an approach combining microkinetic ... -
Comparison of novel olivine supported catalysts for high purity hydrogen production by CO2 sorption enhanced steam reforming
(Peer reviewed; Journal article, 2020)Seven Ni-based catalysts were prepared over different supports (conventional Al2O3, non-conventional olivine and hydrotalcite) with Co and Pd addition. Their catalytic performance was studied in hydrogen production by Steam ... -
Machine Learning and First Principles Modeling Applied to Multiphase Flow Estimation
(Doctoral theses at NTNU;2020:407, Doctoral thesis, 2020)Accurate knowledge of multiphase flowrates produced by each well in an oil and gas production system is important for performing production optimization, flow assurance and reservoir management. Among the alternatives, ... -
From hybrid solvents to water-lean solvents – A critical and historical review
(Journal article; Peer reviewed, 2020)Every year, a plethora of studies focused on developing water-lean solvents for CO2 capture is published in the scientific literature. More often than not, these studies lack a satisfactory contextualization with the ... -
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, ... -
Measurement and prediction of oxygen solubility in post-combustion CO2 capture solvents
(Peer reviewed; Journal article, 2020)This work aims to understand oxygen solubility in pure and aqueous amine solvents for CO2 capture. Commercially available dissolved oxygen sensors were studied to evaluate whether these can be used for measuring oxygen ... -
Subsea Natural Gas Treatment Using Membranes: Experimental and Modeling Study
(Doctoral theses at NTNU;2020:367, Doctoral thesis, 2020)Subsea natural gas reservoirs are usually saturated with water vapor and impurities such as CO2 and H2S, which are the main contributors to the pipeline blockage, hydrate formation, and corrosion. Dehydration is usually ... -
Water-lean solvents for biogas upgrading
(Doctoral theses at NTNU;2020:298, Conference object, 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 ... -
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 ... -
Cellulose nanofibrils as rheology modifiers and stabilizers in food systems
(Doctoral theses at NTNU;2020:291, Doctoral thesis, 2020)Food additives are components used in many food products to improve qualities such as flavor, appearance or texture. In low-fat and non-fat food products, food additives called fat-replacers are added to the food products ... -
Nanomaterials Enhanced Membranes for Carbon Capture
(Doctoral theses at NTNU;2020:253, Doctoral thesis, 2020)Alarming increase in global CO2 emissions has led to climate change. An acceleration in the development of CO2 capture technologies is therefore necessary to facilitate the large-scale implementation of Carbon Capture and ... -
Effect of Low-Molecular-Weight Alcohols on Emulsion Stabilization with Lignosulfonates
(Peer reviewed; Journal article, 2020)Lignosulfonates are biobased surfactants and specialty chemicals, which are described as water-soluble polyelectrolyte macromolecules that are generated during the sulfite pulping of lignocellulose biomass. Due to their ... -
Lignosulfonate Salt Tolerance and the Effect on Emulsion Stability
(Peer reviewed; Journal article, 2020)In this article, we adapted and compared methods to assess lignosulfonates for technical applications. Salt-induced agglomeration and precipitation were studied via mechanical separation and subsequent UV spectrometry. The ... -
Effect of Hydrophobic Iron Oxide Nanoparticles on the Properties of Oil-Based Drilling Fluid
(Peer reviewed; Journal article, 2020)Lately, nanoparticles (NPs) have shown the potential to improve the performance of oil well fluids significantly. Several studies have reported the ability of NPs to produce improved properties of both water and oil-based ... -
Solubility of Carbon Dioxide, Hydrogen Sulfide, Methane, and Nitrogen in Monoethylene Glycol; Experiments and Molecular Simulation
(Peer reviewed; Journal article, 2020)Knowledge on the solubility of gases, especially carbon dioxide (CO2), in monoethylene glycol (MEG) is relevant for a number of industrial applications such as separation processes and gas hydrate prevention. In this study, ... -
Preparation of Carbon Molecular Sieve Membranes with Remarkable CO2/CH4 Selectivity for High-pressure Natural Gas Sweetening
(Peer reviewed; Journal article, 2020)Carbon hollow fiber membranes (CHFMs) were fabricated based on cellulose hollow fiber precursors spun from a cellulose/ionic liquid system. By a thermal treatment on the precursors using a preheating process before ... -
Single Drop Breakage in Turbulent Flow: Statistical Data Analysis
(Peer reviewed; Journal article, 2020)To improve breakage models in the population balance framework, single octanol droplet experiments have been performed in a channel flow and recorded by high-speed camera. The study investigates impact of mother drop size ... -
Lignosulfonates in Crude Oil Processing: Interactions with Asphaltenes at the Oil/Water Interface and Screening of Potential Applications
(Peer reviewed; Journal article, 2020)The goal of this article is to test the potential application of lignosulfonates (LSs) in crude oil production and processing. Three LS samples of varying hydrophobicity and average molecular weight were considered. First, ...
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