title: Development of a biomass torrefaction process integrated with oxy-fuel combustion.
abstract: Torrefaction of forest residues was studied under conditions relevant to oxy-fuel combustion flue gases. The results showed that the torrefaction in CO2 had a lower solid mass yield (81.36%) than that (83.06%) in N2. Addition of steam into CO2 (CO2/H2O=1/0.7 mole/mole) resulted in a higher mass yield (83.30%) compared to 81.36% in CO2. The energy yield was consistently increased from 79.17% to 84.12% or 88.32% for the torrefaction in N2, CO2, or the CO2 and steam mixture, respectively. On the other hand, additions of O2 into the mixture of steam and CO2 led to reductions in both mass yield (from 83.30% to 82.57% or 76.44%) and energy yield (from 88.32% to 84.65% or 79.16%, for the torrefaction in steam and CO2 without O2, with 5% v/v, or 10% v/v of O2, respectively).
authors.affiliation: Department of Energy and Process Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway. Electronic address: Khanh-quang.tran@ntnu.no.
authors.forename: Khanh-Quang
authors.initials: KQ
authors.lastname: Tran
authors.affiliation: Department of Energy and Process Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
authors.forename: Trung Ngoc
authors.initials: TN
authors.lastname: Trinh
authors.affiliation: Department of Energy and Process Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
authors.forename: Quang-Vu
authors.initials: QV
authors.lastname: Bach
mesh_terms: D056804:Biofuels; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002245:Carbon Dioxide / Q000737:chemistry; D016468:Forestry; D009584:Nitrogen / Q000737:chemistry; D028222:Picea
chemical_list: D056804:Biofuels; D002245:Carbon Dioxide; D009584:Nitrogen
keywords: Biomass pretreatment; Flue gas; Oxy-fuel combustion; Process integration; Torrefaction