Bioresource Technology 249 (2018) 348–353 Contents lists available at ScienceDirect Bioresource Technology journal homepage: www.elsevier.com/locate/biortech Torrefaction of corncob to produce charcoal under nitrogen and carbon dioxide atmospheres Shu-Xian Li, Chang-Zhou Chen, Ming-Fei Li , Xiao Xiao Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: Corncob was torreﬁed under nitrogen and carbon dioxide atmospheres at 220–300 °C, obtaining solid products Charcoal with mass yields of 69.38–95.03% and 67.20–94.99% and higher heating values of 16.58–24.77 MJ/kg and Corncob 16.68–24.10 MJ/kg, respectively. The changes of physicochemical properties of the charcoal was evaluated by Torrefaction many spectroscopies, contact angle determination, and combustion test. Hemicelluloses were not detected for Nitrogen the torrefaction under the hard conditions. As the severity increased, C concentration raised while H and O Carbon dioxide concentrations reduced. Combustion test showed that the burnout temperature of charcoal declined with the elevation of reaction temperature, and torrefaction at a high temperature shortened the time for the whole combustion process. Base on the data, torrefaction at 260 °C under carbon dioxide was recommended for the torrefaction of corncob. 1. Introduction from corn processing, is a widely distributed agricultural crop waste
Bioresource Technology – Elsevier
Published: Feb 1, 2018
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