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Temperature and moisture insensitive prediction of biomass calorific value from NIR spectra using external parameter orthogonalization

https://library.fpinnovations.ca/fr/permalink/fpipub52660
Auteur
Hans, Guillaume
Allison, Bruce J.
Date
September 2018
Genre du document
Research report
Domaine
Pulp & Paper Manufacturing
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Auteur
Hans, Guillaume
Allison, Bruce J.
Collaborateur
Natural Resources Canada. Canadian Forest Service
Date
September 2018
Genre du document
Research report
Description physique
27 p.
Secteur
Wood Products
Domaine
Pulp & Paper Manufacturing
Champ de recherche
Control
Sujet
Biomass
Optimization
Spectroscopy
Temperature
Moisture content
Série
Transformative Technology ; TT 2018
Langue
English
Résumé
In the pulp and paper and biofuel industries, real-time online characterization of biomass gross calorific value (GCV) is of critical importance to determine its quality and price and for process optimization. Near-infrared (NIR) spectroscopy is a relatively low-cost technology that could potentially be used for such an application. However, the NIR spectra are also influenced by biomass temperature (T°) and moisture content (MC). In this paper, external parameter orthogonalization (EPO) is employed to remove simultaneously the influence of T° and MC on the spectra before predicting GCV. EPO is of particular interest when one desires to transfer information from one modeling experiment to another, such as when developing a calibration model for a new property from the same material, or when it would be more efficient to divide the experimental effort. EPO was found to be an effective method for desensitizing a PLS calibration model to the influence of T° and MC, enabling robust and accurate prediction biomass GCV. Partial least squares (PLS) regression models developed with EPO always provided equal or better performance than models developed without EPO. The paper shows that experimental efforts and costs can be reduced by approximately one half while maintaining prediction accuracy and model robustness.
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