Characterization of hydrochar obtained from hydrothermal carbonization of wheat straw digestate

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• 作者：M. Toufiq Reza ; Jan Mumme ; Andreas Ebert
• 关键词：Digestate ; Hydrothermal carbonization ; Hydrochar ; Power law correlation ; Solid ; state NMR
• 刊名：Biomass Conversion and Biorefinery
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：5
• 期：4
• 页码：425-435
• 全文大小：866 KB
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• 作者单位：M. Toufiq Reza (1) (2)
  Jan Mumme (1) (3)
  Andreas Ebert (4)
  
  1. Leibniz Institute for Agricultural Engineering Potsdam-Bornim e.V., Max-Eyth-Allee 100, 14469, Potsdam, Germany
  2. Department of Chemical and Materials Engineering, University of Nevada Reno, 1664 N. Virginia Street, Reno, 89557, NV, USA
  3. UK Biochar Center, University of Edinburgh, Edinburgh, EH9 3JN, UK
  4. Fraunhofer Institute for Applied Polymer Research, Geiselbergstrasse 69, 14476, Potsdam-Golm, Germany
  
• 刊物类别：Engineering
• 刊物主题：Biotechnology
  Renewable and Green Energy
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：2190-6823

文摘

Hydrothermal carbonization (HTC) of wheat straw digestate was performed at 180-60 °C for 2- h. The resulted hydrochars were analyzed by ultimate analyzer. Elemental carbon and oxygen concentration of hydrochars were fitted with power law correlation. Moreover, chemical structures of feedstocks and hydrochars were investigated by 13C cross-polarization magic angle spinning (CP/MAS) nuclear magnetic resonance (NMR) spectroscopy. In particular, a procedure including CP dynamics analysis was applied to obtain semi-quantitative information on the composition of the analyzed materials from 13C CP/MAS spectra. Up to a process temperature of 220 °C, digestate-derived hydrochar contained primarily crystalline cellulose and lignin. At 260 °C, crystalline cellulose was degraded and more aliphatic carbon and lignin-rich hydrochars were produced. Ester bands corresponding to hemicellulose disappeared at mild HTC conditions at 180 °C and 2 h. Keywords Digestate Hydrothermal carbonization Hydrochar Power law correlation Solid-state NMR