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Journal articles
Identification of a tmp wood chip refiner with implications for process control, TAPPI JOURNAL, May 1999, Vol. 82(5)
Identification of a tmp wood chip refiner with implications for process control, TAPPI JOURNAL, May 1999, Vol. 82(5)
Journal articles
Influence of base-paper filler content and precalendering on metered film press coatingâ??paper and print Quality, TAPPI JOURNAL, May 1999, Vol. 82(5)
Influence of base-paper filler content and precalendering on metered film press coating—paper and print Quality, TAPPI JOURNAL, May 1999, Vol. 82(5)
Journal articles
TAPPI JOURNAL November 1999; Vol. 82; No. 11 - Evaluation of Surfactants as Digester Additives for Kraft Softwood Pulping, TAPPI JOURNAL, November 1999, Vol. 82(11)
TAPPI JOURNAL November 1999; Vol. 82; No. 11 - Evaluation of Surfactants as Digester Additives for Kraft Softwood Pulping, TAPPI JOURNAL, November 1999, Vol. 82(11)
Journal articles
A guide to flexible press sleeves and applications, TAPPI JOURNAL, November 1999, Vol. 82(11)
A guide to flexible press sleeves and applications, TAPPI JOURNAL, November 1999, Vol. 82(11)
Journal articles
Black liquor gasification: a combination approach, TAPPI JOURNAL, November 1999, Vol. 82(11)
Black liquor gasification: a combination approach, TAPPI JOURNAL, November 1999, Vol. 82(11)
Journal articles
Trends in sweden for closed cycle recovery of tcf bleach filtrates in integrated kraft pulp production, TAPPI JOURNAL, October 1999, Vol. 82(10)
Trends in sweden for closed cycle recovery of tcf bleach filtrates in integrated kraft pulp production, TAPPI JOURNAL, October 1999, Vol. 82(10)
Journal articles
Chlorine dioxide bleaching of single species samples of three hardwood kraft pulps: oak, maple and gum, TAPPI JOURNAL, October 1999, Vol. 82(10)
Chlorine dioxide bleaching of single species samples of three hardwood kraft pulps: oak, maple and gum, TAPPI JOURNAL, October 1999, Vol. 82(10)
Journal articles
On the 'cutting edge', TAPPI JOURNAL, October 1999, Vol. 82(10)
On the 'cutting edge', TAPPI JOURNAL, October 1999, Vol. 82(10)
Magazine articles
Paper kayaks test engineering theories, TAPPI JOURNAL, Septe
Paper kayaks test engineering theories, TAPPI JOURNAL, September 1999, Vol. 82(9)
Journal articles
Research on an energy model for X-ray measurement of paper ash content using COMSOL, TAPPI Journal May 2025
ABSTRACT: Ash content is one of the critical quality parameters in papermaking production. Traditional 55Fe radioactive sources used for online ash content measurement have a short lifespan and high costs, while offline methods such as the combustion method or chemical analysis are time-consuming. Using an X-ray tube as the radiation source, continuous X-ray measurement offers advantages such as being rapid, non-destructive, and cost-effective. In this study, COMSOL software was employed to simulate the measurement process and establish an energy attenuation model for X-ray measurement of paper ash content. The model simulates the energy attenuation of X-rays before and after transmission through four materials: calcium carbonate (CaCO3), titanium dioxide (TiO2), wood-based plant fibers, and paper samples filled with CaCO3. The absorption coefficients of paper samples with varying ash content were investigated using the model and compared with experimental results obtained from continuous X-ray measurements. The results indicate that the proposed energy simulation model can reduce the measurement error of paper ash content by 1%, significantly enhancing the reliability and accuracy of ash content measurement.