TY - JOUR A1 - Diakité, M. A1 - Paul, Andrea A1 - Jäger, Christian A1 - Pielert, J. A1 - Mumme, J. T1 - Chemical and morphological changes in hydrochars derived from microcrystalline cellulose and investigated by chromatographic, spectroscopic and adsorption techniques N2 - Hydrothermal carbonization (HTC) can be used for converting the biomass into a carbon-rich material, whose application as a fuel requires higher heating value, whereas soil amendment needs stable carbon. This work was focused on the characterization of hydrochars derived from microcrystalline cellulose. The chars were investigated using elemental analysis, Brunauer–Emmett–Teller technique, nuclear magnetic resonance spectroscopy, Raman, Fourier transform infrared, and electron spin resonance spectroscopy. Severity in temperature between 230 and 270 °C with reaction times between 2 and 10 h only affect the carbon content moderately. The results show that aromatization of HTC chars correlates well with temperature, which was further supported by the increase of organic radicals with decreasing g values at higher temperatures. Based on these results, the energetic use of chars favors mild HTC (T < 230 °C and t ≤ 6 h), while the soil amendement favors serve conditions (T ≥ 230 °C, and t > 6 h). KW - Hydrothermal carbonization KW - Hydrochar KW - Microcrystalline cellulose KW - NMR-spectroscopy KW - ATR-FTIR-spectroscopy PY - 2013 U6 - https://doi.org/10.1016/j.biortech.2013.09.129 SN - 0960-8524 SN - 1873-2976 VL - 150 SP - 98 EP - 105 PB - Elsevier Ltd. CY - Barking, Essex AN - OPUS4-29824 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -