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Journal articles
Open Access
Formation of pirssonite in green liquor handling systems, TAPPI JOURNAL July 2013

Formation of pirssonite in green liquor handling systems, TAPPI JOURNAL July 2013

Journal articles
Open Access
Performance of alternate superheater materials in a potassium-rich recovery boiler environment, TAPPI JOURNAL July 2013

Performance of alternate superheater materials in a potassium-rich recovery boiler environment, TAPPI JOURNAL July 2013

Journal articles
Open Access
Hydrogen peroxide and caustic soda: Dancing with a dragon while bleaching, TAPPI JOURNAL July 2013

Authors: Peter W. Hart; Carl Houtman; and Kilby Hirth | ABSTRACT: When hydrogen peroxide is mixed with caustic soda, an auto-accelerating reaction can lead to generation of significant amounts of heat and oxygen. On the basis of experiments using typical pulp mill process concentration and temperatures, a relatively simple kinetic model has been developed. Evaluation of these model results reveals that hydrogen peroxide-caustic soda systems are extremely sensitive to hydrogen peroxide:caustic soda ratio, transition metal contamination, and temperature. Small changes in initial conditions can result in a closed system becoming explosive. Analysis of model results was used to develop guidelines for safer application of hydrogen peroxide in a mill setting.

Journal articles
Open Access
Removal of silicon from green liquor with carbon dioxide in the chemical recovery process of wheat straw soda pulping, TAPPI JOURNAL March 2013

Removal of silicon from green liquor with carbon dioxide in the chemical recovery process of wheat straw soda pulping, TAPPI JOURNAL March 2013

Journal articles
Open Access
Effects of flashing on spray characteristics of splashplate nozzles, TAPPI JOURNAL May 2013

Effects of flashing on spray characteristics of splashplate nozzles, TAPPI JOURNAL May 2013

Journal articles
Magazine articles
Open Access
How to use total dissolved solids measurements to evaluate the performance of diffuser washers—A mill study, TAPPI Journal April 2020

ABSTRACT: Various types of pulp washing equipment are available. Each washing device has a unique mechanical construction, and the washing principle is often a combination of dilution, thickening, and displacement washing. In this work, the performance of the pressure diffuser washer is studied. In stepwise trials, the effect of the feed and discharge consistencies on the performance of the diffuser was studied. The effect of the downward velocity of the screen on the pressure diffuser’s washing efficiency was also studied. The measurement of total dissolved solids (TDS) by a process refractometer was used as a wash loss measurement unit and the refractometer’s results were used in the calculations of standardized Nordén efficiency (E10) values. The chemical oxygen demand (COD) and conductivity values were also measured and their results compared to the TDS results.The results indicated that feed consistency has a significant effect on the performance and effectiveness of the diffuser washers in the mill. It can also be stated that when the downward velocity of the screen is adjusted to too high a level, the washing efficiency of the pressure diffuser decreases. As a conclusion from the mill tests, it can be stated that even small process parameter changes can provide enhanced diffuser washing at the beginning of the washing line, which has a direct effect on the performance of post-oxygen washing.

Journal articles
Open Access
Are your thermowells safe?, TAPPI JOURNAL, April 2002 (270KB), (TAPPI JOURNAL APRIL 2002)

Are your thermowells safe?, SOLUTIONS! & TAPPI JOURNAL, April 2002 (270KB)

Journal articles
Open Access
Formation of sulfur-rich melt near the floor tubing of kraft recovery boilers, TAPPI JOURNAL, April 2002, Vol. 1(2) (192KB)

Formation of sulfur-rich melt near the floor tubing of kraft recovery boilers, TAPPI JOURNAL, April 2002, Vol. 1(2) (192KB)

Journal articles
Open Access
Thermal Yellowing of Hardwood Kraft Pulp Bleached with a Chlorine Dioxide Based Sequence, JOURNAL OF PULP AND PAPER SCIENCE: VOL. 28 NO. 4 APRIL 2002 [02APRJP115.pdf]

Thermal yellowing of hardwood kraft pulp bleached with a chlorine dioxide based sequence, Journal of Pulp and Paper Science, April 2001, Vol. 28(4) (111KB)

Journal articles
Open Access
TJ web enhancements, TAPPI JOURNAL, August 2002, Vol. 1(6) (

TJ web enhancements, TAPPI JOURNAL, August 2002, Vol. 1(6) (49KB)

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