Blar i Institutt for kjemisk prosessteknologi på tittel
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On intermetallic phases formed during interdiffusion between aluminium alloys and stainless steel
(Peer reviewed; Journal article, 2022)One of the major challenges in welding of aluminium (Al) alloys and steels is the growth of brittle intermetallic phases, which depends on the thermomechanical processing history and the alloying elements. This work focuses ... -
On the Durability of Protective Titania Coatings on High-Voltage Spinel Cathodes
(Peer reviewed; Journal article, 2022)TiO2-coating of LiNi0.5-xMn1.5+xO4 (LNMO) by atomic layer deposition (ALD) has been studied as a strategy to stabilize the cathode/electrolyte interface and mitigate transition metal (TM) ion dissolution. The TiO2 coatings ... -
On the effect of the approach velocity on the coalescence of fluid particles
(Journal article; Peer reviewed, 2019)The effect of the constant relative approach velocity of two Newtonian fluid particles on their coalescence is investigated via a film drainage model. The interfaces are deformable and allowed to have any degree of mobility. ... -
On the interfacial roughness scale in turbulent stratified two-phase flow: 3D lattice Boltzmann numerical simulations with forced turbulence and surfactant
(Journal article; Peer reviewed, 2015)Numerical 3D simulations of turbulent, stratified two-phase shear flow with a surfactant laden interface were used to test and develop a phenomenological interfacial roughness scale model where the energy required to deform ... -
On the nature of Pt-carbon interactions for enhanced hydrogen generation
(Peer reviewed; Journal article, 2020)Understanding the metal-support interactions in heterogeneous catalysis is critical yet complicated to tailor-design the catalysts with desirable properties. Exemplified with Pt-catalyzed ammonia borane (AB) hydrolysis, a ... -
On the role of the surface rheology in film drainage between fluid particles
(Journal article; Peer reviewed, 2019) -
On the Solution of the Pellet- and Reactor Model for the Steam Methane Reforming Process Using the Methods of Weighted Residuals
(Master thesis, 2012)The purpose of the thesis is to prove that the mole based formulation of a pellet model simulating the steam methane reforming reaction is identical to the novel mass based formulation. To prove this, the numerical methods ... -
On-Line PI Controller tuning Using Closed-Loop Setpoint Response
(Journal article; Peer reviewed, 2010)The proposed method is similar to the Ziegler-Nichols (1942) tuning method, but it is faster to use and does not require the system to approach instability with sustained oscillations. The method requires one closed-loop ... -
Once-Through Gas-to-Liquid Process Concept for Offshore Applications
(Master thesis, 2015)The worlds energy demand is increasing, and at the same time the amount of easily accessible oil is reduced. Associated gas for most off-shore applications are flared or injected in the reservoir due to transportation ... -
One-pot catalytic vinyl chloride (VCM) production
(Master thesis, 2019)Målet med denne tesen var å syntetisere metallfrie katalysatorer for ett-steg syntese av vinylkloridmonomer (VCM), samt videre studie av katalysatorene ved bruk av ulike karakteriseringsteknikker som N2-fysisorbsjon, Raman ... -
One-pot conversion of biomass to chemicals
(Master thesis, 2017)One-pot conversion of biomass to diols can be a simple and fast alternative to other methods of biomass conversion. The catalyst for this conversion is required to be bifunctional, catalysing both hydrogenation and retro-aldol ... -
One-pot Conversion of Biomass to Chemicals on Ni-Cu/ZnO Based Catalysts
(Master thesis, 2015)Optimization of the one-pot hydrothermal reaction of cellulose to polyols have been investigated. Ni-Cu-ZnO catalysts supported by carbon nanotubes (CNT) with varying nickel (Ni) and copper (Cu) mole ratio was synthesized ... -
One-Pot Conversion of Cellulose to Ethylene Glycol and Propylene Glycol over Nickel Zinc Oxide Catalysts with CNT Support
(Master thesis, 2013)Ni-Zn oxide catalysts with CNT support were prepared by the pechini method, and evaluated for the conversion of cellulose to polyols. The catalysts were characterized by XRD, SEM/TEM, N2 adsorption, temperature programmed ... -
One-pot Conversion of Cellulose to Ethylene Glycol using CNT Supported Tungsten Catalysts
(Master thesis, 2017)The one-pot catalytic conversion of cellulose to ethylene glycol (EG) is a promising approach for biomass utilization. The catalysts developed for this process have to be bifunctional, catalysing both retro-aldol condensation ... -
One-pot synthesis of highly dispersed mesoporous Cu/ZrO2 catalysts for NH3-SCR
(Peer reviewed; Journal article, 2021)Catalysts consisting of highly dispersed copper on a mesoporous ZrO2 support were synthesised via a one-pot sol-gel synthesis and were tested for the selective catalytic reduction of NOx by NH3. The copper dispersion was ... -
Online PID Tuning for Unstable Processes: Application to Anti-Slug Control
(Master thesis, 2013)Slug flow is an undesired multiphase flow phenomena causing problems in the processing of oil and gas. Anti-slug control is therefore an important research topic. Satisfactory results have been achieved in anti-slug control ... -
Online Process Optimization with Active Constraint Set Changes using Simple Control Structures
(Journal article; Peer reviewed, 2019)The purpose of this paper is to show that online process optimization can be achieved using simple control structures without the need for solving numerical optimization problems online. In particular, we show that changes ... -
Ontology Design for Representation of mathematical Models
(Master thesis, 2015)In this study, ontologies intended for structuring information of physical-chemical-biological processes has been presented. The ontologies was implemented in a tool, called the "Ontology Editor", that facilitate for ... -
Ontology-based Computer-aided modelling Tool
(Master thesis, 2012)A long-lived software project for using the advantages of a computer in modelling of physical-chemical-biological processes has been under development by supervisor Prof Heinz A. Preisig. The software is designed to assist ... -
Ontology-Based Process Modelling-with Examples of Physical Topologies
(Journal article, 2021)