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Journal articles
Isolation of Residual Kraft Lignin in High Yield and Purity, JOURNAL OF PULP AND PAPER SCIENCE: VOL. 28 NO. 2 FEBRUARY 2002 [02FEBJP50.pdf]
Isolation of residual kraft lignin in high yield and purity, Journal of Pulp and Paper Science, February 2002, Vol. 28(2) (113KB)
Journal articles
Rationalization of the use of taed during activated peroxide delignification and bleaching. Part I: kinetic model, Journal of Pulp and Paper Science, October 2002, Vol. 28(10) [02OCTJP332.pdf]
Rationalization of the use of taed during activated peroxide delignification and bleaching. Part I: kinetic model, Journal of Pulp and Paper Science, October 2002, Vol. 28(10) (296KB)
Journal articles
Biodegradation of spent pulping liquor lignins under mesophilic and thermophilic anaerobic conditions, TAPPI JOURNAL, April 2003, Vol. 2(4) (178KB)
Biodegradation of spent pulping liquor lignins under mesophilic and thermophilic anaerobic conditions, Solutions! & TAPPI JOURNAL, April 2003, Vol. 2(4) (178KB)
Conference papers
Recent advances in the commercialization of NIR (near-infrar
Recent advances in the commercialization of NIR (near-infrared) based liquor analyzers in the pulping and recovery areas, TAPPI JOURNAL, November 2006
Journal articles
Use of enzymes for reduction in refining energy - laboratory
Use of enzymes for reduction in refining energy - laboratory studies, TAPPI JOURNAL, November 2006
Journal articles
Image analytical monitoring of paper quality - a feasibility
Image analytical monitoring of paper quality - a feasibility study, TAPPI JOURNAL, November 2006
Journal articles
Editor's Notes: Ready for a Test Drive, TAPPI JOURNAL, Novem
Editor's Notes: Ready for a Test Drive, TAPPI JOURNAL, November, 2006
Journal articles
Presentation of a dry black liquor gasification process with direct causticization, TAPPI Journal March 2006
Presentation of a dry black liquor gasification process with direct causticization, TAPPI Journal March 2006
Journal articles
Prediction of residual calcium carbonate (CaCO3) in the lime
ABSTRACT: In a kraft pulp mill, the rotary lime kiln is responsible for converting calcium carbonate (CaCO3) into calcium oxide (CaO) to be reused in the causticizing plant. An important parameter of the calcination efficiency and the product quality is the amount of CaCO3 not converted to CaO, commonly defined as residual carbonate. This parameter is usually determined through laboratory analysis, which introduces delays in process control and limits the ability to make timely operational adjustments. This work presents a predictive model that functions as a soft sensor for the residual carbonate in a lime kiln of a Brazilian kraft pulp mill. This model was able to estimate residual CaCO3 every 30 min using routinely measured online process variables, which is a considerable reduction from the 6-h average laboratory measurement. The correlation coefficient (r) between the model predictions and the mill values was 0.83, with a mean absolute error (MAE) of 0.33%. Considering the effect of the residence time throughout the lime kiln proved to be decisive in obtaining a satisfactory prediction result. After model validation, a variable importance analysis showed that the carbon monoxide (CO) concentration in the stack flue gas (in ppm), secondary air temperature (in oC), and fan speed (in %) were the most influential variables in predicting the residual carbonate content. Combined with commonly used operation expertise, this subset of variables can serve as additional information to achieve smoother lime kiln operation.
Journal articles
Effect of basis weight and freeness on sheet permeability and critical impulse-drying temperature, TAPPI JOURNAL, February 1994, Vol. 77(2)
Effect of basis weight and freeness on sheet permeability and critical impulse-drying temperature, TAPPI JOURNAL, February 1994, Vol. 77(2)