TY - JOUR
T1 - Hydrothermal carbonization (HTC)
T2 - Near infrared spectroscopy and partial least-squares regression for determination of selective components in HTC solid and liquid products derived from maize silage
AU - Reza, M. Toufiq
AU - Becker, Wolfgang
AU - Sachsenheimer, Kerstin
AU - Mumme, Jan
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Near-infrared (NIR) spectroscopy was evaluated as a rapid method of predicting fiber components (hemicellulose, cellulose, lignin, and ash) and selective compounds of hydrochar and corresponding process liquor produced by hydrothermal carbonization (HTC) of maize silage. Several HTC reaction times and temperatures were applied and NIR spectra of both HTC solids and liquids were obtained and correlated with concentration determined from van-Soest fiber analysis, IC, and UHPLC. Partial least-squares regression was applied to calculate models for the prediction of selective substances. The model developed with the spectra had the best performance in 3-7 factors with a correlation coefficient, which varied between 0.9275-0.9880 and 0.9364-0.9957 for compounds in solid and liquid, respectively. Calculated root mean square errors of prediction (RMSEP) were 0.42-5.06. mg/kg. The preliminary results indicate that NIR, a widely applied technique, might be applied to determine chemical compounds in HTC solid and liquid.
AB - Near-infrared (NIR) spectroscopy was evaluated as a rapid method of predicting fiber components (hemicellulose, cellulose, lignin, and ash) and selective compounds of hydrochar and corresponding process liquor produced by hydrothermal carbonization (HTC) of maize silage. Several HTC reaction times and temperatures were applied and NIR spectra of both HTC solids and liquids were obtained and correlated with concentration determined from van-Soest fiber analysis, IC, and UHPLC. Partial least-squares regression was applied to calculate models for the prediction of selective substances. The model developed with the spectra had the best performance in 3-7 factors with a correlation coefficient, which varied between 0.9275-0.9880 and 0.9364-0.9957 for compounds in solid and liquid, respectively. Calculated root mean square errors of prediction (RMSEP) were 0.42-5.06. mg/kg. The preliminary results indicate that NIR, a widely applied technique, might be applied to determine chemical compounds in HTC solid and liquid.
KW - HTC biochar
KW - Hydrothermal carbonization
KW - NIR spectroscopy
KW - Partial least-squares regression
KW - Principle component analysis
UR - http://www.scopus.com/inward/record.url?scp=84896978986&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2014.03.008
DO - 10.1016/j.biortech.2014.03.008
M3 - Article
C2 - 24686376
AN - SCOPUS:84896978986
VL - 161
SP - 91
EP - 101
JO - Bioresource technology
JF - Bioresource technology
SN - 0960-8524
ER -