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Browsing SINTEF Open by Author "Várhegyi, Gábor"

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    • 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)
    • Effect of slow pyrolysis conditions on biocarbon yield and properties: Characterization of the volatiles 

      Babinszki, Bence; Sebestyén, Zoltán; Jakab, Emma; Kőhalmi, Luca; Bozi, Janos; Várhegyi, Gábor; Wang, Liang; Skreiberg, Øyvind; Czégény, Zsuzsanna (Peer reviewed; Journal article, 2021)
      Slow pyrolysis of spruce and birch was performed at various heating programs and conditions in a horizontal quartz tube reactor heated by an electric furnace. The effects of feedstock and carbonization conditions on the ...
    • EFFECT OF STORAGE TIME AND CONDITIONS ON BIOMASS CHARCOAL PROPERTIES 

      Wang, Liang; Hu, Kathryn; Higashi, Charissa; Skreiberg, Øyvind; Myrvågnes, Viktor; Grønli, Morten; Antal, Michael Jerry; Várhegyi, Gábor (Journal article, 2015)
    • Empirical Kinetic Models for the CO2 Gasification of Biomass Chars. Part 1. Gasification of Wood Chars and Forest Residue Chars 

      Várhegyi, Gábor; Wang, Liang; Skreiberg, Øyvind (Journal article; Peer reviewed, 2021)
      The gasification kinetics of charcoals and biomass chars is complicated by several factors, including chemical and physical inhomogeneities, the presence of mineral matter, and the irregular geometry of the pore structure. ...
    • Kinetics of the CO2 gasification of woods, torrefied woods, and wood chars. Least squares evaluations by empirical models 

      Várhegyi, Gábor; Wang, Liang; Skreiberg, Øyvind (Peer reviewed; Journal article, 2023)
      The gasification kinetics of chars forming from biomass materials was studied by kinetic equations of type dX/dt = A f(X) exp(− E/(RT)) where X is the conversion of the sample, A is the pre-exponential factor, E is the ...
    • Non-isothermal kinetics: Best fitting empirical models instead of model-free methods 

      Várhegyi, Gábor; Wang, Liang; Skreiberg, Øyvind (Journal article; Peer reviewed, 2019)
      The isoconversional (or model-free) methods cannot provide meaningful kinetic description for most samples in thermal analysis. Nevertheless, they can serve as empirical models. A usable empirical model should describe ...
    • Thermal Decomposition Kinetics of Wood and Bark and their Torrefied Products 

      Barta-Rajnai, Eszter; Várhegyi, Gábor; Wang, Liang; Skreiberg, Øyvind; Grønli, Morten; Czégény, Zsuzsanna (Journal article; Peer reviewed, 2017)
    • Towards a meaningful non-isothermal kinetics for biomass materials and other complex organic samples 

      Várhegyi, Gábor; Wang, Liang; Skreiberg, Øyvind (Journal article; Peer reviewed, 2017)

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