Blar i Institutt for prosess-, energi- og miljøteknologi på tittel
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Investigation of the shifting-parameter as a function of density in the fluidization of a packed bed
(Conference report, 2010)Accurate predictions of pressure drops in fluidized beds are of great importance in the industry. Up to date no satisfactory correlation exists to predict the pressure drop in a fluidized bed as the bed is traversing from ... -
Investigation of the shifting-parameter as a function of particle size distribution in a fluidized bed traversing from a fixed to fluidized bed
(Conference object; Peer reviewed, 2010)The particles in a biomass gasifier are mainly a mixture of wood chips, char particles and bed material. The charwood particles have a significant lower density than the bed material, and also a wider range of particle ... -
Investment cost estimates and investment decisions
(Journal article; Peer reviewed, 2002)When evaluating new investment projects, oil companies traditionally use the discounted cashflow method. This method requires expected cashflows in the numerator and a risk-adjusted required rate of return in the denominator ... -
Kiln process impact of alternative solid fuel combustion in the cement kiln main burner - Mathematical modelling and full-scale experiment
(Journal article; Peer reviewed, 2014-02)Increased use of alternative fuels in cement kilns is a trend in the world. However, replacing fossil fuels like coal with different alternative fuels will give various impacts on the overall kiln process due to the fuel ... -
Laminar burning velocity of gases vented from failed Li-ion batteries
(Journal article; Peer reviewed, 2021)In the last decade, several fires and explosions caused by Li-ion batteries (LIBs) have been reported. This can be attributed to the thermal runaway and catastrophic failures of LIBs that release combustible gases, which ... -
Laminar burning velocity of the dimethyl carbonate–air mixture formed by the Li-ion electrolyte solvent
(Peer reviewed; Journal article, 2020)If a Li-ion cell fails and the electrolyte leaks out into air, a flammable premixed gas cloud can be formed. The electrolyte combustion energy is 65–70% of the total energy content of the cell. The main objective of this ... -
Life Cycle Assessment under Uncertainty: A Scoping Review
(Peer reviewed; Journal article, 2022)Today, life cycle assessment (LCA) is the most widely used approach to model and calculate the environmental impacts of products and processes. The results of LCAs are often said to be deterministic, even though the real-life ... -
Liquefaction of lignocellulosic biomass for methane production: A review
(Peer reviewed; Journal article, 2021)Hydrothermal pretreatment (HTP) (Hot water extraction (HWE) and steam pretreatment) and pyrolysis have the potential to liquefy lignocellulosic biomass. HTP produces hydrolysate, consisting mainly of solubilized hemicellulose, ... -
Low temperature methanol synthesis catalyzed by copper nanoparticles
(Journal article; Peer reviewed, 2017)A one pot catalytic system which involves Cu and an alkoxide co-catalyst has been used for methanol (MeOH) synthesis at low temperature. Up to about 92% syngas conversion per pass and more than 90% selectivity to MeOH ... -
Low-Viscosity Nonaqueous Sulfolane-Amine-Methanol Solvent Blend for Reversible CO2 Capture
(Peer reviewed; Journal article, 2022)In this work, the absorption–desorption performance of CO2 in six new solvent blends of amine (diisopropylamine (DPA), 2-amino-2-methyl-1-propanol (AMP), methyldiethanolamine (MDEA), diethanolamine (DEA), diisopropanolamine ... -
Mapping anaerobic sludge bed community adaptations to manure supernatant in biogas reactors
(Journal article; Peer reviewed, 2018)In upflow anaerobic sludge bed (UASB) reactors, biomass present as granules allows for long solids retention time. Here, granules from a process treating pulp and paper industrial wastewater were successfully applied as ... -
Mathematical Modeling and Optimization of a Vehicle Crash Test based on a Single-Mass
(Chapter, 2014)In this paper mathematical modelling of a vehicle crash test based on a single mass is studied. The models under consideration consist of a single mass, a spring and/or a damper. They are constructed according to the ... -
Mathematical modelling of mass transfer of paramagnetic ions through an inert membrane by the transient magnetic concentration gradient force. https://
(Peer reviewed; Journal article, 2020)The objective of this work is to suggest a mathematical model for mass-transfer of a paramagnetic electrolyte, nickel(ii)chloride solution, through an inert, thin membrane from one chamber to another under the influence ... -
Measurement and characterization of biomass mean residence time in an air-blown bubbling fluidized bed gasification reactor
(Peer reviewed; Journal article, 2019)Gasification of biomass in bubbling fluidized beds can be limited by accumulation of unconverted char particles during the process. The amount of unconverted biomass depends on the residence time of the fuel particles. ... -
Men's artistic gymnastics: a new high bar-gymnast model with sensitivity analysis
(Journal article; Peer reviewed, 2011)The purpose of this work1 was to develop a new 2D gymnast - high bar model with horizontal bar endpoint dynamics included. To this end, a three-spring high bar model was extended with a 5 segment gymnast model followed by ... -
Mesh Sensitivity Analysis of an Entrained Flow Biomass Gasifier: A CPFD Study
(Chapter, 2022)Biomass such as agricultural waste, forestry waste, municipal solid waste, and industrial waste, are renewable energy sources that may be used to produce biofuels. Biomass gasification is an effective and promising technology ... -
Methane from Syngas by Anaerobic Digestion
(Journal article; Peer reviewed, 2017)Anaerobic digestion (AD) is a prominent green technology used for methane production from organic waste. Previous studies have shown that the amount of CH4 produced during anaerobic digestion can be increased by adding ... -
Method of identifying an operating regime in a bubbling fluidized bed gasification reactor
(Journal article; Peer reviewed, 2020)This work presents a new method for identifying the bubbling regime of a fluidized bed gasification reactor. The method has been developed using experimental measurements and a computational model. Pressure drops are ... -
Model Based Early Kick/Loss Detection and Attenuation with Topside Sensing in Managed Pressure Drilling
(Peer reviewed; Journal article, 2020)Early kick/loss detection is a crucial part of safe well control, and it plays a major role in the reduction of risk and non-productive time in drilling. In conventional drilling, topside sensing is used for early kick/loss ... -
Model uncertainty of interfacial area and mass transfer coefficients in absorption column packings
(Journal article; Peer reviewed, 2017)Uncertainty in model input parameters propagates through the model to make model output imprecision. Here, mathematical models used to calculate interfacial area and mass transfer coefficient for both random and structured ...