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Journal articles
Open Access
Hydrogen-peroxide-reinforced oxygen delignification of southern pine kraft pulp and short sequence bleaching, TAPPI JOURNAL, July 1990, Vol. 73(7)

Hydrogen-peroxide-reinforced oxygen delignification of southern pine kraft pulp and short sequence bleaching, TAPPI JOURNAL, July 1990, Vol. 73(7)

Journal articles
Open Access
Biomechanical pulping of aspen chips: paper strength and optical properties resulting from different fungal Treatments, TAPPI JOURNAL, March 1990, Vol. 73(3)

Biomechanical pulping of aspen chips: paper strength and optical properties resulting from different fungal Treatments, TAPPI JOURNAL, March 1990, Vol. 73(3)

Journal articles
Open Access
Chloroform generation at bleach plants with high chlorine dioxide substitution or oxygen delignification, TAPPI JOURNAL, April 1991, Vol. 74(4)

Chloroform generation at bleach plants with high chlorine dioxide substitution or oxygen delignification, TAPPI JOURNAL, April 1991, Vol. 74(4)

Journal articles
Open Access
Vibration analysis is the cornerstone of predictive and preventative maintenance, TAPPI JOURNAL, August 1991, Vol. 74(8)

Vibration analysis is the cornerstone of predictive and preventative maintenance, TAPPI JOURNAL, August 1991, Vol. 74(8)

Journal articles
Open Access
Yankee dryer coatings, TAPPI JOURNAL, August 1991, Vol. 74(8)

Yankee dryer coatings, TAPPI JOURNAL, August 1991, Vol. 74(8)

Journal articles
Open Access
Recycling wood fiber in municipal solid wastes: opportunity for government - industry partnership, TAPPI JOURNAL, April 1991, Vol. 74(4)

Recycling wood fiber in municipal solid wastes: opportunity for government - industry partnership, TAPPI JOURNAL, April 1991, Vol. 74(4)

Journal articles
Open Access
Experiences using super pressurized groundwood at a finnish supercalender paper mill, TAPPI JOURNAL, December 1991, Vol. 74(12)

Experiences using super pressurized groundwood at a finnish supercalender paper mill, TAPPI JOURNAL, December 1991, Vol. 74(12)

Journal articles
Open Access
Guest Editorial: TAPPIâ??s 2013 PEERS Conference: Pulp manufacturing highlights, TAPPI JOURNAL March 2014

Guest Editorial: TAPPI’s 2013 PEERS Conference: Pulp manufacturing highlights, TAPPI JOURNAL March 2014

Journal articles
Open Access
Qualification of Welding Procedures for Duplex Stainless Ste

Qualification of Welding Procedures for Duplex Stainless Steels, 1999 Engineering Conference Proceedings

Journal articles
Open Access
Data driven modeling to reduce fossil fuel consumption in a lime kiln integrated with biomass gasifier, TAPPI Journal September 2026

ABSTRACT: Biomass gasification, although already known and applied, is currently being consolidated as a sustainable alternative in the pulp industry, contributing to the reduction of fossil carbon dioxide (CO2) emissions and to the utilization of forest residues. In this context, pulp mills are beginning to adopt biomass gasification within their chemical recovery cycles by integrating the technology with lime kilns. However, further process studies are still needed to support and optimize this application. Thus, the present study aimed to analyze lime mud feed temperature by applying an artificial neural network model to a gasification system integrated with a lime kiln. For this evaluation, 10 periods of system stability throughout 2024 were selected under different operational conditions. Data from 28 potential predictive variables were collected, a total of 348 observations. This dataset was then processed using R software, where data treatment and model dimensionality reduction were performed, resulting in 10 predictive variables between gasifier and kiln. Next, the dataset was randomly divided into training (70% of the observations) and testing data. The established neural network model (using “neuralnet” package) was optimized, resulting in a configuration containing one hidden layer with three neurons. This setup enabled optimal estimation of the flue gas kiln outlet temperature, with mean absolute error (MAE) = 3.0°C and root mean square error (RMSE) = 4.1°C, applying the resilient backpropagation algorithm with backtracking — both below the thermocouple’s measurement error (±5.0°C) for the evaluated average temperature range (668.2°C). When the same dataset was modeled using the resilient backpropagation algorithm without backtracking, even better results were achieved: MAE = 2.5°C and RMSE = 3.7°C. Thus, after evaluating these and other configurations, it was concluded that the best model required 10 predictive variables and the backpropagation algorithm without backtracking to determine flue gas kiln outlet temperature. These results provide a better understanding of how gasifier and kiln variables influence the temperature in the lime kiln, which is essential to improve control and optimize the calcination process, avoiding supplementary fossil fuel consumption.

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