Browsing USN Open Archive by Author "Melaaen, Morten Christian"
Now showing items 1-20 of 28
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A comparative study between electrical capacitance tomography and time-resolved X-ray tomography
Rautenbach, Christo; Mudde, Robert F.; Yang, X.; Melaaen, Morten Christian; Halvorsen, Britt (Journal article; Peer reviewed, 2013)Modern day tomographs enable the research community to investigate the internal flow behaviour of a fluidized bed by non invasive methods that partially overcome the opaque nature of a dense bubbling bed. Each tomographic ... -
CCS in the Skagerrak/Kattegat area
Haugen, Hans Aksel; Aagard, Per; Thyberg, Brit Inger; Kjärstad, Jan; Langlet, David; Melaaen, Morten Christian; Liljemark, Stefan; Bergmo, Per Eirik Strand; Skagestad, Ragnhild; Mathisen, Anette; Jarsve, Erlend Morisbak; Faleide, Jan Inge; Bjørnsen, Dag (Journal article; Peer reviewed, 2011-04-01)This paper presents an ongoing project with the aim to assess a CO2 infrastructure in the Skagerrak/Kattegat region (the sea bordered by north of Denmark, south coast of Norway and the west coast of Sweden). The area ... -
Composite Distribution Solution for Minimizing Heat Loss in a Pyrolysis Reactor
Filtvedt, Werner O.; Melaaen, Morten Christian; Holt, Arve; Javidi, Massoud; Olaisen, Birger Retterstøl (Journal article; Peer reviewed, 2011)The article presents a novel design for a distribution plate. The solution is suitable for a reactor vessel where a reactant gas needs to be maintained at a different temperature from the reaction chamber in order to avoid ... -
Determination of biomass fraction for partly renewable solid fuels.
Ariyaratne, W. K. Hiromi; Melaaen, Morten Christian; Tokheim, Lars-André (Journal article; Peer reviewed, 2014-04-29)Biomass-based waste fuels are used in many industrial applications since combustion of biomass gives no net emissions of carbon dioxide. Some waste fuels, e.g. RDF (refuse derived fuels), contain not only biomass, but also ... -
Determination of fossil fraction of refuse derived fuel by the selective dissolution method in calorific value basis: Development of simplified method.
Ariyaratne, W. K. Hiromi; Asgautsen, Øyvind; Melaaen, Morten Christian; Eine, Kristin; Tokheim, Lars-André (Journal article; Peer reviewed, 2012)Determination of net CO2 emissions from combustion of Refuse Derived Fuel (RDF) is not straight forward due to the heterogeneous nature of the fuel. The fossil fraction of the fuel is an essential parameter for the ... -
Effect of operating conditions and particle properties on performance of vertical air-lift
Chladek, Jana; Enstad, Gisle; Melaaen, Morten Christian (Journal article; Peer reviewed, 2011)The effect of the fluidization air flow rate and the transport air velocity on the solids mass flow rate and the pressure drop along the transport pipe was investigated in a vertical air-lift. The use of two different ... -
Euler-Granular Approach for Modelling of Dilute Phase Pneumatic Conveying in a Vertical Pipe
Welahettige, Prasanna Kumara Welahetti; Ariyaratne, W. K. Hiromi; Melaaen, Morten Christian (Journal article; Peer reviewed, 2017)In the present study, vertically upward dilute phase pneumatic conveying flow was predicted using Euler - Granular method. Three dimensional computational fluid dynamics simulations were carried out for an 8 m long and ... -
Eulerian-Eulerian simulation of heat transfer between a gas-solid fluidized bed and an immersed tube-bank with horizontal tubes
Yusuf, Rahel; Halvorsen, Britt; Melaaen, Morten Christian (Journal article; Peer reviewed, 2011-04-15)A two dimensional Eulerian-Eulerian simulation of tube-to-bed heat transfer is carried out for a cold gas fluidized bed with immersed horizontal tubes. The horizontal tubes are modelled as obstacles with square cross section ... -
Gamma densitometry measurements of gas/liquid flow with low liquid fractions in horizontal and inclined pipes
Vestøl, Sondre; Kumara, W.A.S.; Melaaen, Morten Christian (Journal article; Peer reviewed, 2018)The ability to accurately predict the volume fraction of different phases flowing in a pipe is of extreme importance to nuclear and oil industries, among others. This article will focus on the application of a single-beam ... -
Impact of kiln thermal energy demand and false air on cement kiln flue gas CO2 capture
Arachchige, Udara Sampath P.; Kawan, Dinsesh; Tokheim, Lars-André; Melaaen, Morten Christian (Journal article; Peer reviewed, 2014)The present study is focused on the effect of the specific thermal energy demand and the false air factor on carbon capture applied to cement kiln exhaust gases. The carbon capture process model was developed and implemented ... -
Increased Coal Replacement in a Cement Kiln Burner by Feeding a Mixture of Solid Hazardous Waste and Shredded Plastic Waste
Ariyaratne, W. K. Hiromi; Melaaen, Morten Christian; Tokheim, Lars-André (Journal article; Peer reviewed, 2013-07)The present study aims to find the maximum possible replacement of coal by combined feeding of plastic waste and solid hazardous waste mixed with wood chips (SHW) in rotary kiln burners used in cement kiln systems. The ... -
Investigation into optimal CO2 concentration for CO2 capture from aluminium production
Mathisen, Anette; Sørensen, Henriette; Melaaen, Morten Christian; Müller, Gunn-Iren (Journal article; Peer reviewed, 2013-08-05)Capture of CO2 from aluminum production has been simulated using Aspen Plus and Aspen Hysys. The technology used for aluminum production is the Hall-Héroult and the current cell design necessitates that large amounts of ... -
Investigation of the shifting-parameter as a function of density in the fluidization of a packed bed
Rautenbach, Christo; Melaaen, Morten Christian; Halvorsen, Britt (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
Rautenbach, Christo; Melaaen, Morten Christian; Halvorsen, Britt (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 ... -
Kiln process impact of alternative solid fuel combustion in the cement kiln main burner - Mathematical modelling and full-scale experiment
Ariyaratne, W. K. Hiromi; Melaaen, Morten Christian; Tokheim, Lars-André; Manjula, Edirisinghe V. P. J. (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 ... -
NEQ rate based modeling of an absorption column for post combustion CO2 capturing
Jayarathna, Sanoja A.; Lie, Bernt; Melaaen, Morten Christian (Journal article; Peer reviewed, 2011-04-01)Post combustion CO2 capture via absorption into aqueous alkanolamine systems is considered to be the most mature and potential technique for CO2 removal from the power plants' exhaust gases. Modeling and simulation of such ... -
Numerical modeling of the calcination process in a cement kiln system
Kahawalage, Amila Chandra; Melaaen, Morten Christian; Tokheim, Lars-André (Journal article; Peer reviewed, 2017)The calcium carbonate decomposition into calcium oxide and carbon dioxide is a key process step in a cement kiln. The reaction requires thermal energy input, and pulverized coal is the fuel typically used for this purpose ... -
Opportunities and challenges of using SRF as an alternative fuel in the cement industry
Kahawalage, Amila Chandra; Melaaen, Morten Christian; Tokheim, Lars-Andre (Journal article, 2023)Over two billion tonnes of municipal solid wastes (MSW) are generated annually from households, industrial facilities, and commercial sites. The non-hazardous fraction of MSW is used to produce solid recovered fuels (SRF), ... -
Optimized carbon dioxide removal model for gas fired power plant
Arachchige, Udara Sampath P.; Mohsin, Muhammad; Melaaen, Morten Christian (Journal article; Peer reviewed, 2012)The carbon capture process model was developed for 500MW gas-fired power plant flue gas treating. Three different efficiencies, 85%, 90%, and 95%, were used to implement the model in Aspen Plus. The electrolyte NRTL rate ... -
Optimum feeding rate of solid hazardous waste in a cement kiln burner
Ariyaratne, W. K. Hiromi; Melaaen, Morten Christian; Tokheim, Lars-André (Journal article; Peer reviewed, 2013)Solid hazardous waste mixed with wood chips (SHW) is a partly CO2 neutral fuel, and hence is a good candidate for substituting fossil fuels like pulverized coal in rotary kiln burners used in cement kiln systems. SHW is ...