TAPPI Conference Papers

Rebuilding Tissue Machine Vision Systems Without the Failure Points of Legacy Technology and Hardware, TAPPICon25

Reducing Environmental Impact in Tissue Production: The Sustainable Innovation of UltraCORE, TAPPICon25

Shock pulse cleaning- an innovative method of on-line boiler cleaning, TAPPICon25

Siemens Energy Steam Turbogenerators, TAPPICon25

Size-controlled preparation of lignin nanoparticles in a continuous process, TAPPICon25

Superior Drying Efficiency with Steel vs Cast Iron Concepts, TAPPICon25

The Path to Optimized Asset Performance Management: A Comprehensive Framework, TAPPICon25

The Quest for Sustainability • How Molded Fiber is Changing the Packaging Space, TAPPICon25

Turn the Art of Wastewater into the Science of Wastewater, TAPPICon25

Recent advances in the commercialization of NIR (near-infrar

ABSTRACT: Near-infrared (NIR) spectroscopy techniques have held the promise of a new generation of online and lab based process analyzers for the pulping and recovery areas for some years now. NIR technology has been shown to be a quite effective method for the analysis of white, green and black liquors by multiple investigators. NIR reflectance techniques have been shown to be effective in predicting yield and kappa number in pulp samples. Recently, commercial analyzers have been developed for green liquor analysis on the dissolving tank, white and green liquor analysis in the recaust area and black liquor analysis on batch and continuous digesters. These analyzers are currently running at different mill sites and are proving to be superior to current technology choices for these applications. A commercial online and lab based yield and kappa number analyzer are currently being developed based on NIR reflectance techniques. Results will be presented on the performance of these analyzers relating to accuracy, maintenance and total installed cost. Other potential NIR applications in the pulping and recovery area will also be addressed.