• 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. ...
    • Detailed operational mapping of a grate fired Biomass combustion plant for improved combustion process control 

      Khalil, Roger Antoine; Malik, Azhar; Ku, Xiaoke; Skreiberg, Øyvind; Fossum, Morten; Becidan, Michael; Løvås, Terese (Journal article; Peer reviewed, 2016)
      Biomass combustion plants in Norway are facing stricter emission regulations and lower profitability, mostly due to low energy prices. Hence, performance optimization through improved combustion process control and/or ...
    • Effect of Temperature and Duration of Torrefaction on the Thermal Behavior of Stem Wood, Bark, and Stump of 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 minutes isothermal ...
    • Effect of torrefaction on physiochemical characteristics and grindability of stem wood, stump and bark 

      Wang, Liang; Barta-Rajnai, Eszter; Skreiberg, Øyvind; Khalil, Roger Antoine; Czégény, Zsuzsanna; Jakab, Emma; Barta, Zsolt; Grønli, Morten (Journal article; Peer reviewed, 2017)
      In this work, Norway spruce stem wood, stump and bark were torrefied in a bench scale tubular reactor at 225, 275 and 300 °C with two residence times (30 and 60 min). Effect of torrefaction on general properties, chemical ...
    • Effects of wet torrefaction on reactivity and kinetics of wood under air combustion conditions 

      Bach, Quang Vu; Tran, Khanh-Quang; Skreiberg, Øyvind; Khalil, Roger Antoine; Phan, N. Anh (Journal article; Peer reviewed, 2014)
      This work continues our assessment of wet torrefaction for energy applications, looking at effects of the process parameters (temperature, holding time and pressure) on the reactivity and intrinsic kinetics of wood under ...
    • Impact of Torrefaction on Woody Biomass Properties 

      Wang, Liang; Barta-Rajnai, Eszter; Skreiberg, Øyvind; Khalil, Roger Antoine; Czégény, Zsuzsanna; Jakab, Emma; Barta, Zsolt; Grønli, Morten (Journal article; Peer reviewed, 2017)
      In this work, Norway spruce stem wood, stump and bark were torrefied in a tubular reactor. The effects of feedstock type and torrefaction process parameters such as torrefaction temperature and residence time on the ...
    • Pyrolysis of Untreated and Various Torrefied Stem Wood, Stump, and Bark of Norway Spruce 

      Barta-Rajnai, Eszter; Sebestyén, Zoltán; Jakab, Emma; Patus, Eszter; Bozi, Janos; Wang, Liang; Skreiberg, Øyvind; Grønli, Morten; Khalil, Roger Antoine; Czégény, Zsuzsanna (Journal article; Peer reviewed, 2019)
      The effect of torrefaction severity (temperature and residence time) was studied on the thermal decomposition of different parts of Norway spruce (stem wood, stump, and bark). The volatile content of the torrefied samples ...