title: Thermal decomposition dynamics and severity of microalgae residues in torrefaction.
abstract: To figure out the torrefaction characteristics and weight loss dynamics of microalgae residues, the thermogravimetric analyses of two microalgae (Chlamydomonas sp. JSC4 and Chlorella sorokiniana CY1) residues are carried out. A parameter of torrefaction severity index (TSI) in the range of 0-1, in terms of weight loss ratio between a certain operation and a reference operation, is defined to indicate the degree of biomass thermal degradation due to torrefaction. The TSI profiles of the two residues are similar to each other; therefore, the parameter may be used to describe the torrefaction extents of various biomass materials. The curvature of TSI profile along light torrefaction is slight, elucidating its slight impact on biomass thermal degradation. The sharp curvature along severe torrefaction in the initial pretreatment period reveals that biomass upgraded with high temperature and short duration is more effective than using low temperature with long duration.
authors: Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan, ROC. Electronic address: weihsinchen@gmail.com.
authors: Wei-Hsin
authors: WH
authors: Chen
authors: Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan, ROC.
authors: Ming-Yueh
authors: MY
authors: Huang
authors: Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan, ROC; Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan, ROC; Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 701, Taiwan, ROC.
authors: Jo-Shu
authors: JS
authors: Chang
authors: Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan, ROC.
authors: Chun-Yen
authors: CY
authors: Chen
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002696:Chlamydomonas / Q000378:metabolism*; D002708:Chlorella / Q000378:metabolism*; D006358:Hot Temperature; D007700:Kinetics; D058086:Microalgae / Q000378:metabolism*; D013818:Thermogravimetry
keywords: Microalgae residues; Thermogravimetric analysis; Torrefaction and pyrolysis; Torrefaction kinetics; Torrefaction severity index (TSI)