Journal article
Power plant intake quantification of wheat straw composition for 2nd generation bioethanol optimization: A Near Infrared Spectroscopy (NIRS) feasibility study
Aalborg University1
Bioenergy and Biomass, Biosystems Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Biosystems Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
Risø National Laboratory for Sustainable Energy, Technical University of Denmark4
Optimization of 2nd generation bioethanol production from wheat straw requires comprehensive knowledge of plant intake feedstock composition. Near Infrared Spectroscopy is evaluated as a potential method for instantaneous quantification of the salient fermentation wheat straw components: cellulose (glucan), hemicelluloses (xylan, arabinan), and lignin.
Aiming at chemometric multivariate calibration, 44 pre-selected samples were subjected to spectroscopy and reference analysis. For glucan and xylan prediction accuracies (slope: 0.89, 0.94) and precisions (r2: 0.87) were obtained, corresponding to error of prediction levels at 8–9%. Models for arabinan and lignin were marginally less good, and especially for lignin a further expansion of the feasibility dataset was deemed necessary.
The results are related to significant influences from sub-sampling/mass reduction errors in the laboratory regimen. A relative high proportion of outliers excluded from the present models (10–20%) may indicate that comminution sample preparation is most likely always needed. Different solutions to these issues are suggested.
Language: | English |
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Year: | 2010 |
Pages: | 1199-1205 |
ISSN: | 18732976 and 09608524 |
Types: | Journal article |
DOI: | 10.1016/j.biortech.2009.09.027 |