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Journal articles
Variability of effluents from mills with advanced control, TAPPI JOURNAL, January 1994, Vol. 77(1)
Variability of effluents from mills with advanced control, TAPPI JOURNAL, January 1994, Vol. 77(1)
Journal articles
Kinetics of oxygen bleaching mediated by electrochemically generated ferricyanide, TAPPI JOURNAL, July 1994, Vol. 77(7)
Kinetics of oxygen bleaching mediated by electrochemically generated ferricyanide, TAPPI JOURNAL, July 1994, Vol. 77(7)
Journal articles
Effect of enzyme pretreatment on ozone bleaching, TAPPI JOURNAL, July 1994, Vol. 77(7)
Effect of enzyme pretreatment on ozone bleaching, TAPPI JOURNAL, July 1994, Vol. 77(7)
Journal articles
High-consistency ozone-bleaching technology, TAPPI JOURNAL, June 1994, Vol. 77(6)
High-consistency ozone-bleaching technology, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
Mill experience in high-consistency ozone bleaching of southern pine pulp, TAPPI JOURNAL, June 1994, Vol. 77(6)
Mill experience in high-consistency ozone bleaching of southern pine pulp, TAPPI JOURNAL, June 1994, Vol. 77(6)
Journal articles
Effects of D0-stage temperature, pH, and kappa factor on chl
Effects of D0-stage temperature, pH, and kappa factor on chlorine dioxide decomposition and D0-(EP)-D1 bleaching performance for eucalypt pulps, TAPPI JOURNAL April 2016
Journal articles
Assessing lignin content in Nordic hardwood and softwood species using models based on near-infrared (NIR) spectral data and partial least squares regression (PLSR), TAPPI Journal September 2025
ABSTRACT: Continuous kraft cooking digesters face challenges affecting product quality, making it valuable to improve control through advanced techniques like near-infrared (NIR) spectroscopy, model predictive control, and machine learning models. The primary goal of this study was to use NIR spectra to predict the amount of lignin in hardwood and softwood samples. This study investigated the correlation of NIR derivative spectra with the amounts of lignin relative to other constituents, namely cellulose, hemicellulose, and water, in wood chip samples of varying chip sizes and shapes from six Nordic wood species. It employed partial least squares regression (PLSR) on the NIR data to construct a model that predicted the lignin fraction and the relative fraction of acid-soluble lignin. When trained on a group of five wood species, the model achieved a satisfactory predictive ability, striking a balance between a wide range of lignin content and a consistent chemical environment. The accuracy increased further when the model was restricted only to spruce and pine, reflecting the benefits of a more homogenous dataset. Additionally, the optimal number of latent variables was identified as two, indicating that three distinct chemical components — cellulose, lignin and water — can be effectively differentiated using NIR.
Journal articles
Magazine articles
Utilization of palm fiber as papermaking materials: Microscopic structure and chemical pulping, TAPPI Journal October 2022
ABSTRACT: The microscopic structure and pulping properties of palm fiber were explored. Soda cooking and sulfate cooking were conducted and compared in terms of physical strength of the obtained pulps. Sulfate pulp showed better performance than soda pulp, as indicated by the 23% higher tensile index, 49% higher tear index, and 36% higher burst index. To further elevate physical strength, long fibered pulp (LFP), namely commercial softwood sulfate pulp, was mixed with sulfate pulp of palm fiber at levels from 20% to 50%. At the blend level of 50%, tensile index of 52.13 Nœm/g, tear index of 15.63 mNœm2/g, and burst index of 3.42 kPaœm2/g were attained. The lignin in spent liquor from pulping was isolated and characterized. Soda lignin of palm fiber was mainly composed of guaiacyl and syringyl units, and showed weight-average molecular weight of 3616 g/mol.
Journal articles
Biomechanical pulping of bagasse with the white rot fungi ceriporiopsis subvermispora and pleurotus ostreatus, TAPPI JOURNAL, June 1999, Vol. 82(6)
Biomechanical pulping of bagasse with the white rot fungi ceriporiopsis subvermispora and pleurotus ostreatus, TAPPI JOURNAL, June 1999, Vol. 82(6)
Journal articles
Fiber length fractionation of tmp using pressure screens, TAPPI JOURNAL, June 1999, Vol. 82(6)
Fiber length fractionation of tmp using pressure screens, TAPPI JOURNAL, June 1999, Vol. 82(6)