Institutt for kjemisk prosessteknologi
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A Computationally Efficient Formulation of the Governing Equations for Unit Operation Design
(Peer reviewed; Journal article, 2021)A computationally-efficient numerical method that uses a Pseudo-Eulerian formulation (PEF) for the design calculation of unit operations is presented and validated. This method is applicable to any unit operation that can ... -
Regenerable Sorbents for High-Temperature Desulfurization of Syngas from Biomass Gasification
(Peer reviewed; Journal article, 2021)Single-metal high-temperature solid sorbents for syngas cleaning using Mn, Ca, Fe, Cu, or Mo supported on γ-Al2O3 were synthesized, characterized, and tested in a fixed-bed reactor. H2S and SO2 concentrations in the gas ... -
Stability of amines for CO2 capture
(Doctoral theses at NTNU;2021:257, Doctoral thesis, 2021)Despite of being a well-tested and highly attractive technology for capture of carbon dioxide (CO2), amine scrubbing encounters economic and operational challenges originating from degradation of the amine solvent, in ... -
Understanding of K and Mg co-promoter effect in ethylene oxychlorination by operando UV–vis-NIR spectroscopy
(Peer reviewed; Journal article, 2020)The comprehensive kinetic study for CuCl2/γ-Al2O3-based catalysts was performed to elucidate the co-promoter effect in the ethylene oxychlorination, one of the most significant industrial processes to produce vinyl chloride ... -
Polyvinylamine based Facilitated Transport Membranes for Post-combustion CO2 Capture: Challenges and Perspectives from Materials to Processes
(Peer reviewed; Journal article, 2020)This review highlights recent developments and future perspectives on CO2 capture from power plants and energy-intensive industries to reduce CO2 emissions. Different types of membrane materials for CO2 capture were reviewed ... -
Effects of metal dusting relevant exposures of alloy 601 surfaces on carbon formation and oxide development
(Peer reviewed; Journal article, 2020)Ni and Fe are excellent catalysts for carbon formation, and industrial alloys are therefore susceptible to metal dusting corrosion; a costly issue in e.g. synthesis gas manufacture. The objective of this work is to better ... -
A Novel Hybrid Digestion-Gasification Process Integrated with Membranes for Efficient Conversion of Biomass to Bio-alcohols
(Peer reviewed; Journal article, 2020)There is an urgent need to develop technologies which enable the conversion of biomass into liquid biofuels to fill the gap between limited fossil fuel supplies and increasing worldwide demand. In order to achieve the EU ... -
A Non-Autonomous Relativistic Frame of Reference for Unit Operation Design
(Peer reviewed; Journal article, 2020)This contribution presents an efficient systematic algorithm for unit operation design that uses a newly developed non-autonomous relativistic frame of reference (NARF). The NARF is aimed towards the conceptual design of ... -
A Petlyuk distillation column dynamic analysis: Hysteresis and bifurcations
(Peer reviewed; Journal article, 2020)Thermally coupled distillation columns (TCDC) have proven to be a superior and feasible alternative compared to conventional distillation. However, their inherent system complexity presents optimization and operational ... -
Analysis and selection of optimal solvent-based technologies for biogas upgrading
(Journal article; Peer reviewed, 2021)Biogas upgrading is an important industrial process for producing biomethane, a sustainable energy source with low carbon footprint. There are three main solvent-based alternatives for biogas upgrading: water scrubbing, ... -
Kinetic Studies of Ethylene Oxychlorination to Ethylene Dichloride and Vinyl Chloride
(Doctoral theses at NTNU;2021:85, Doctoral thesis, 2021)Polyvinyl chloride (PVC) is the most versatile of all thermoplastics that can be used in a wide range of applications. It is the third-highest volume polymer, slightly behind polyethylene and polypropylene. Vinyl chloride, ... -
Microfluidic methods for studying oil recovery by aqueous floods at different wettability, temperature and pressure conditions
(Doctoral theses at NTNU;2021:78, Doctoral thesis, 2021)To keep up with the energy consumption in the world and recover sustainably from the currently developed oil fields, enhanced oil recovery (EOR) methods have been proven important. To be able to test the processes and new ... -
Emulsions in external electric fields
(Peer reviewed; Journal article, 2021)Water is co-produced with crude oils, generally in the form of water-in-crude oil emulsions. The oil and water phases need to be separated before export. Separation is performed in gravity separators with the addition of ... -
A review of degradation and emissions in post-combustion CO2 capture pilot plants
(Peer reviewed; Journal article, 2021)Pilot plant testing of amine solvents for post-combustion CO2 capture is an essential tool for fully understanding degradation behaviour and emission profiles under realistic process conditions. This review aims to summarise ... -
Transformed Manipulated Variables for Linearization, Decoupling and Perfect Disturbance Rejection
(Journal article; Peer reviewed, 2020) -
Screening of Inhibition of Calcium Naphthenate Deposition in Crude Oil
(Peer reviewed; Journal article, 2021)One of the initial steps in calcium naphthenate deposition is the reaction between ARN and Ca2+ leading to the formation of an interfacial gel. After growing, this gel will form calcium naphthenate deposits that are a ... -
Stability of Structurally Varied Aqueous Amines for CO2 Capture
(Peer reviewed; Journal article, 2021)Eighteen structurally varied amines were subjected to harsh oxidative conditions, and their stability was assessed and seen in the context of biological and thermal stability. Steric effects play a large role in the ... -
Fundamentals and physical principles for drilled cuttings transport – Cuttings bed sedimentation and erosion
(Peer reviewed; Journal article, 2021)The increasing necessity of challenging wellbore structures and drilling optimization for improved hole cuttings cleaning has been growing along time. As a result, operator companies have been researching and applying ... -
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 ... -
Comparing C5Pe and Asphaltenes under Temperature and Pressure Reservoir Conditions Using an Acoustic Wave Sensor
(Peer reviewed; Journal article, 2021)A quartz crystal resonator (QCR) was employed to assess the ability of the C5Pe model asphaltene compound to form nanoaggregates in toluene and bigger flocs that adsorb on the QCR surfaces at a higher concentration of ...
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