Browsing Institutt for energi og prosessteknikk by Author "Jakab, Emma"

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    • 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). ...

    • 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. ...

    • Comprehensive Compositional Study of Torrefied Wood and Herbaceous Materials by Chemical Analysis and Thermoanalytical Methods 

      Barta-Rajnai, Eszter; Jakab, Emma; Sebestyén, Zoltán; May, Zoltán; Barta, Zsolt; Wang, Liang; Skreiberg, Øyvind; Grønli, Morten; Bozi, Janos; Czégény, Zsuzsanna (Journal article; Peer reviewed, 2016)
      In this work, the torrefaction of three biomass materials, black locust wood, wheat, and rape straw, was studied at various temperatures: 200, 225, 250, 275, and 300 °C. The thermal stability and formation of the decomposition ...

    • 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 ...

    • 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 ...