Browsing NTNU Open by Author "Skreiberg, Øyvind"
Now showing items 1-20 of 64
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A kinetic study on simultaneously boosting the mass and fixed-carbon yield of charcoal production via atmospheric carbonization
Alonso, Maria Zabalo; Tran, Quang Khanh; Wang, Liang; Skreiberg, Øyvind (Journal article; Peer reviewed, 2017)The mass and fixed-carbon yield of charcoal produced from woody biomass via atmospheric carbonization can be simultaneously improved by harnessing the phenomenon of secondary char formation as a result of prolonged contact ... -
A Simplified Power Sizing Method for the Correct Building Integration of Wood Stoves
Thalfeldt, Martin; Skare, Anders; Georges, Laurent; Skreiberg, Øyvind (Journal article; Peer reviewed, 2019)Wood stoves are widely used in dwellings for space heating, however transient heat output and relatively large heat emission might cause problems with over-heating in new well-insulated buildings. This paper introduces a ... -
A thermogravimetric and kinetic study on devolatilization of woody biomass
Zabalo Alonso, María (Master thesis, 2016)Biomass is a promising energy resource for a more sustainable global energy outlook. Thermochemical conversion of biomass is a very attractive and important technology for energy generation and production of value-added ... -
A Two-Dimensional Study on the Effect of Anisotropy on the Devolatilization of a Large Wood Log
Haugen, Nils Erland L; Skreiberg, Øyvind (Journal article; Peer reviewed, 2019)In this work, a two-dimensional (2D) model for wood particle drying, devolatilization, and char conversion is presented and validated against experimental studies of devolatilization of a large, dry, cylindrical birch wood ... -
An evaluation of effects of fuel parameters and flue gas recirculation on NOx emissions through detailed chemical kinetics simulations
Skreiberg, Øyvind; Li, Tian; Wang, Liang; Bugge, Mette; Løvås, Terese (Journal article; Peer reviewed, 2019)In this work the effects of fuel parameters and under grate flue gas recirculation (FGR) are investigated when applying staged air combustion of solid fuel for the purpose of NOx reduction. In addition to temperatures, ... -
An evaluation of effects of operational parameters on NOx emissions through detailed chemical kinetics simulations
Skreiberg, Øyvind; Li, Tian; Vantaggiato, Elettra; Wang, Liang; Bugge, Mette; Løvås, Terese (Journal article; Peer reviewed, 2019)NOx emissions from biomass and Municipal Solid Waste (MSW) combustion is a great concern. Technologies for reducing NOx emissions based on flue gas cleaning using e.g. Selective Non-Catalytic Reduction (SNCR) or Selective ... -
Assessment of Transient NOx Reduction Potential in Wood Stoves
Skreiberg, Øyvind; Li, Tian; Bugge, Mette; Haugen, Nils Erland L (Journal article; Peer reviewed, 2020)NOx emissions from wood stoves remain a significant concern, even though modern wood stoves are continuously improved regarding emissions due to incomplete combustion, e.g. particulates of organic origin. Today, state of ... -
Bed Model for Grate-Fired Furnaces: Computational Fluid Dynamics Modeling and Comparison to Experiments
Haugen, Nils Erland L; Bugge, Mette; Mack, Alexander; Li, Tian; Skreiberg, Øyvind (Peer reviewed; Journal article, 2022)A detailed but still central processing unit (CPU)-efficient bed model for grate-fired combustion of biomass and waste is developed. Simulations of wood chip combustion are performed, and the results are compared to ... -
Biocarbonization process for high quality energy carriers: Techno-economics
Kempegowda, Rajesh Shivanahalli; Skreiberg, Øyvind; Tran, Khanh-Quang (Journal article; Peer reviewed, 2017)This work deals with a process design and techno-economic analysis (TEA) of the enablement of biocarbonization processes for production of biocarbon, biocrude, biomethane, biofertilizer and heat. Three case scenarios are ... -
Biomass Charcoal Properties Changes during Storage
Wang, Liang; Barta-Rajnai, Eszter; Hu, Kathryn; Higashi, Charissa; Skreiberg, Øyvind; Grønli, Morten; Czégény, Zsuzsanna; Jakab, Emma; Myrvågnes, Viktor; Várhegyi, Gabor; Antal, Michael Jerry (Journal article; Peer reviewed, 2017)In this work, effects of storage time and conditions on the properties of one woody charcoal were studied. Prior to the storage test, the untreated charcoal was characterized by thermogravimetry/mass spectrometry (TG/MS). ... -
Carbonization pressure influence on fixed carbon yield
Skreiberg, Øyvind; Wang, Liang; Bach, Quang Vu; Grønli, Morten (Journal article; Peer reviewed, 2018)Biocarbon, or charcoal, is receiving increased attention as an increasingly important reductant in metallurgical industries, and has as well many others uses, e.g. as high quality fuel or as activated carbon. Traditional ... -
CHARCOAL PRODUCTION FROM FOREST RESIDUES
Wang, Liang; Higashi, Charissa; Skreiberg, Øyvind; Grønli, Morten; Antal, Michael Jerry (Journal article; Peer reviewed, 2015)The carbonization behaviors of spruce wood and its forest residue at different conditions were studied in this work. A standard proximateanalysis procedure delivered the lowest charcoaland fixed-carbon yields. Sample ... -
CO2 Gasification of Charcoals in the Context of Metallurgical Application
Bui, Hau-Huu; Wang, Liang; Tran, Khanh-Quang; Skreiberg, Øyvind; Luengnaruemitchai, Apanee (Journal article; Peer reviewed, 2017)The CO2 gasification reactivity of Norwegian spruce charcoals from stem wood and its forest residue produced at different pressures was investigated in the present study. The gasification behavior was analyzed thermograv ... -
CO2 Gasification of Charcoals Produced at Various Pressures
Bui, Hau-Huu; Wang, Liang; Tran, Khanh-Quang; Skreiberg, Øyvind (Journal article; Peer reviewed, 2016)In this work, stem wood and branches and tops of Norwegian spruce and birch were carbonized at different pressures, producing charcoals of which the CO2 gasification reactivity was studied by means of a thermogravimetric ... -
CO2 Gasification of Chars Prepared by Fast and Slow Pyrolysis from Wood and Forest Residue: A Kinetic Study
Wang, Liang; Li, Tian; Várhegyi, Gábor; Skreiberg, Øyvind; Løvås, Terese (Journal article; Peer reviewed, 2017)The CO2 gasification of chars was investigated by thermogravimetric analysis (TGA). The chars were prepared from spruce and its forest residue. Prior to the gasification, the raw materials were pelletized and pulverized. ... -
CO2 reactivity assessment of woody biomass biocarbons for metallurgical purposes
Wang, Liang; Hovd, Benedicte; Bui, Hau-Huu; Valderhaug, Aasgeir Mikael; Videm Buø, Therese; Birkeland, Rolf Gunnar; Skreiberg, Øyvind; Tran, Khanh-Quang (Journal article; Peer reviewed, 2016)Replacing the use of fossil reductants with biocarbons in metallurgical industries has a great potential with respect to reducing CO2 emissions and the contribution from this industry to the increasing greenhouse gas effect. ... -
COMBUSTION CHARACTERISTICS OF BIOMASS CHARCOAL PRODUCED AT DIFFERENT CARBONIZATION CONDITIONS
Wang, Liang; Várhegyi, Gabor; Skreiberg, Øyvind; Grønli, Morten; Antal, Michael Jerry (Journal article; Peer reviewed, 2015)The combustion properties of spruce chars and spruce forest residue chars were studied in the kinetic regime by a series of TGA experiments. The work aimed at establishing how the pressure of the char preparation affects ... -
Combustion of Thermally Thick Wood Particles: A Study on the Influence of Wood Particle Size on the Combustion Behavior
Haberle, Inge; Haugen, Nils Erland L; Skreiberg, Øyvind (Journal article; Peer reviewed, 2018)A one-dimensional (1D) comprehensive combustion model for thermally thick wet wood particles, which is also applicable for studying large wood logs, is developed. The model describes drying, devolatilization, and char ... -
Comparative study on the thermal behavior of untreated and various torrefied bark, stem wood, and stump of Norway spruce
Barta-Rajnai, Eszter; Wang, Liang; Sebestyén, Zoltán; Barta, Zsolt; Khalil, Roger Antoine; Skreiberg, Øyvind; Grønli, Morten; Jakab, Emma; Czégény, Zsuzsanna (Journal article; Peer reviewed, 2017)In this work, the torrefaction of different parts of Norway spruce (stem wood, bark, and stump) was studied. Three different torrefaction temperatures were applied: 225, 275, and 300 °C with 30 and 60 min isothermal periods. ... -
Comparison of numerical efficiency of the thermal and the kinetic rate drying model applied to a thermally thick wood particle
Haberle, Inge; Haugen, Nils Erland L; Skreiberg, Øyvind (Journal article; Peer reviewed, 2017)In this work, the drying and devolatilization of a thermally thick wood particle were modeled. The work was validated against experiments and good agreement was found. The work compared the numerical efficiency and accuracy ...