Monday, April 30, 2007

Recent developments in rapid NIR/PLS analysis of corn stover feedstock and process intermediates

Amie D. Sluiter, National Bioenergy Center, National Renewable Energy Laboratory, 1617 Cole Blvd., MS 3323, Golden, CO 80401

Obtaining rapid, accurate chemical compositions of biomass and biomass-derived material is crucial to the commercialization of processes that convert biomass to fuels and chemicals. Rapid techniques have been developed at NREL that combine Near Infrared (NIR) spectroscopy and Partial Least Squares (PLS) multivariate analysis to provide chemical characterization of biomass feedstocks and process intermediates. These rapid techniques can provide significant savings in time and money with precision and accuracy that matches traditional wet chemical methods. They also support and improve research by providing levels of information that would have been otherwise too costly to pursue using traditional analysis methods.

Applications and advantages of NIR/PLS methods are presented. Aspects of NIR/PLS method development are described including the collection and analysis of appropriate calibration samples, the development and validation of multivariate analysis equations, and the use of appropriate QA/QC techniques. Improvements in corn stover feedstock, corn stover process intermediate solid, and corn stover acid pretreated hydrolysis liquor methods are covered.


Bonnie Hames, Raymond Ruiz, Dan Schell, Justin Sluiter, Steve Thomas, Ed Wolfrum

This work has been authored by an employee or employees of the Midwest Research Institute under Contract No. DE-AC36-99GO10337 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for United States Government purposes.