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Are North American Kraft Pulp Mills at Risk?, Paper360º November/December 2018
Are North American Kraft Pulp Mills at Risk?, Paper360º November/December 2018
Journal articles
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.
Better Practices Better Plant - Continuing AF&PA's Commitment to Sustainability, 2011 PEERS Conference
Better Practices Better Plant - Continuing AF&PA's Commitment to Sustainability, 2011 PEERS Conference
Conference papers
SIMULTANEOUS PRECIPITATION IN AN ECF KRAFT PULP MILL: LONG-TERM EXPERIENCES, 19PEERS
SIMULTANEOUS PRECIPITATION IN AN ECF KRAFT PULP MILL: LONG-TERM EXPERIENCES, 19PEERS
Conference papers
Fate of Phosphorus in the Lime Cycle of the Kraft Pulping Process, 19PEERS
Fate of Phosphorus in the Lime Cycle of the Kraft Pulping Process, 19PEERS
Conference papers
Peracetate Singlet Oxygen Chemistry as a Safe, Simple and Effective Alternative for Peracetic Acid, 19PEERS
Peracetate Singlet Oxygen Chemistry as a Safe, Simple and Effective Alternative for Peracetic Acid, 19PEERS
Conference papers
Ethyl xylosides formation during SO2-Ethanol-Water (SEW) pul
Ethyl xylosides formation during SO2-Ethanol-Water (SEW) pulping of sugarcane straw, 2017PEERS
Conference papers
FACTORS AFFECTING PARTICULATE REMOVAL EFFICIENCY OF KRAFT RE
FACTORS AFFECTING PARTICULATE REMOVAL EFFICIENCY OF KRAFT RECOVERY BOILER ELECTROSTATIC PRECIPITATORS - A TECHNICAL REVIEW, 2017PEERS
Journal articles
Magazine articles
Effect of high sulfate content on viscosity of recovery boiler molten smelt, TAPPI Journal March 2024
ABSTRACT: A systematic study was conducted to examine the effect of high sulfate content on the freezing temperature of molten smelt and how this may contribute to the formation of viscous jellyroll smelt in recovery boilers. The results show that even for recovery boilers with a smelt reduction as low as 70%, the sulfate content in smelt has no or little effect on smelt freezing temperature, and hence, on molten smelt fluidity. The perceived adverse effect of high sulfate content on smelt fluidity and on jellyroll smelt formation comes from the high sulfate content in deposits that have fallen from the upper furnace. Fallen deposits may or may not form jellyroll smelt, depending on whether or not they can melt and be well-mixed with molten smelt by the time they reach the smelt spouts. It is not the high sulfate content in smelt resulting from the low smelt reduction efficiency that makes molten smelt viscous and forms jellyroll smelt, but rather, it is the incomplete melting of fallen deposits that results in one of the proposed mechanisms for jellyroll smelt formation.
Process Stewardship - Beyond Mill-Wide Systems for Survival
Process Stewardship - Beyond Mill-Wide Systems for Survival in the 90s, 1992 Process Control, Electrical & Info. Conference Proceedings