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Magazine articles
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
Timber bamboo pulp, TAPPI JOURNAL February 2013
Timber bamboo pulp, TAPPI JOURNAL February 2013
Journal articles
Stoichiometric model of chlorine dioxide delignification of hardwood kraft pulps with oxidant-reinforced extraction effect, TAPPI JOUNRAL February 2013
Stoichiometric model of chlorine dioxide delignification of hardwood kraft pulps with oxidant-reinforced extraction effect, TAPPI JOUNRAL February 2013
Journal articles
Improving pulp yield for integrated southern hardwood kraft millsâ??significance and impact on chemical recovery, steam and power generation, and bleaching, TAPPI JOURNAL February 2013
Improving pulp yield for integrated southern hardwood kraft mills—significance and impact on chemical recovery, steam and power generation, and bleaching, TAPPI JOURNAL February 2013
Journal articles
Cleavage of acetyl groups from northeast hardwood for acetic acid production in kraft pulp mills, TAPPI JOURNAL February 2013
Cleavage of acetyl groups from northeast hardwood for acetic acid production in kraft pulp mills, TAPPI JOURNAL February 2013
Journal articles
A new perspective on tissue wet strength decay: the real values, TAPPI JOURNAL January 2013
A new perspective on tissue wet strength decay: the real values, TAPPI JOURNAL January 2013
Journal articles
Techno-economic analysis of process alternatives for the production of ethylene-propylene rubber from forest-based feedstocks, TAPPI JOURNAL January 2013
Techno-economic analysis of process alternatives for the production of ethylene-propylene rubber from forest-based feedstocks, TAPPI JOURNAL January 2013
Journal articles
Characterization of dissolved material during the initial phase of softwood kraft pulping, TAPPI JOURNAL January 2013
Characterization of dissolved material during the initial phase of softwood kraft pulping, TAPPI JOURNAL January 2013
Journal articles
Characterization of hard scale formed in the kraft mill green liquor processing equipment, TAPPI JOURNAL January 2013
Characterization of hard scale formed in the kraft mill green liquor processing equipment, TAPPI JOURNAL January 2013
Journal articles
Colloidal organic content and tackiness of coated broke and recycled fiber, TAPPI JOURNAL July 2013
Colloidal organic content and tackiness of coated broke and recycled fiber, TAPPI JOURNAL July 2013