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Journal articles
Magazine articles
Open Access
Exergy and sensibility analysis of each individual effect in a kraft multiple effect evaporator, TAPPI Journal October 2019

ABSTRACT: The multiple effect evaporator (MEE) is an energy intensive step in the kraft pulping process. The exergetic analysis can be useful for locating irreversibilities in the process and pointing out which equipment is less efficient, and it could also be the object of optimization studies. In the present work, each evaporator of a real kraft system has been individually described using mass balance and thermodynamics principles (the first and the second laws). Real data from a kraft MEE were collected from a Brazilian plant and were used for the estimation of heat transfer coefficients in a nonlinear optimization problem, as well as for the validation of the model. An exergetic analysis was made for each effect individually, which resulted in effects 1A and 1B being the least efficient, and therefore having the greatest potential for improvement. A sensibility analysis was also performed, showing that steam temperature and liquor input flow rate are sensible parameters.

Journal articles
Open Access
Factors contributing to improved environmental performance in the Finnish kraft pulping industry, TAPPI JOURNAL, September 2007

Factors contributing to improved environmental performance in the Finnish kraft pulping industry, TAPPI JOURNAL, September 2007

Journal articles
Open Access
Revisiting paper strength measurements or estimating combined board strength, TAPPI JOURNAL, September 2007

Revisiting paper strength measurements or estimating combined board strength, TAPPI JOURNAL, September 2007

Journal articles
Open Access
A Diffractive Gloss Meter for Local Gloss Measurements of Papers and Prints, TAPPI JOURNAL April 2008

A Diffractive Gloss Meter for Local Gloss Measurements of Papers and Prints, TAPPI JOURNAL April 2008

Journal articles
Open Access
Effect of HYP Fibers on Bulk and Surface roughness of Wood-Free Paper, TAPPI JOURNAL April 2008

Effect of HYP Fibers on Bulk and Surface roughness of Wood-Free Paper, TAPPI JOURNAL April 2008

Journal articles
Open Access
Strategies for Economical Alternatives for Wax Replacement in Packaging, TAPPI JOURNAL April 2008

Strategies for Economical Alternatives for Wax Replacement in Packaging, TAPPI JOURNAL April 2008

Journal articles
Open Access
Performance of a final hydrogen peroxide stage in the ECF bleaching of Eucalypt DOEOPD1 Kraft Pulps

Performance of a final hydrogen peroxide stage in the ECF bleaching of Eucalypt D0EOPD1 kraft pulps, TAPPI JOURNAL, August 2008

Journal articles
Magazine articles
Open Access
Editorial: New lignocellulosics address consumer expectations and industry prosperity, TAPPI JOURNAL February 2018

Editorial: New lignocellulosics address consumer expectations and industry prosperity, TAPPI JOURNAL February 2018

Journal articles
Magazine articles
Open Access
Activated carbon from potassium hydroxide spent liquor lignin using phosphoric acid, TAPPI JOURNAL February 2018

Activated carbon from potassium hydroxide spent liquor lignin using phosphoric acid, TAPPI JOURNAL February 2018

Journal articles
Magazine articles
Open Access
Slot die coating of nanocellulose on paperboard, TAPPI Journal January 2018

Slot die coating of nanocellulose on paperboard, TAPPI Journal January 2018

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