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Presentation of a dry black liquor gasification process with direct causticization
Quantification of Softwood, Hardwood, and Nonwood Fiber
Journal articles
Preparation and characterization of cellulose nanofibers from bleached pulp using a mechanical treatment method, TAPPI JOURNAL May 2014
Preparation and characterization of cellulose nanofibers from bleached pulp using a mechanical treatment method, TAPPI JOURNAL May 2014
Use of enzymes for reduction in refining energy - laboratory
ABSTRACT: We performed laboratory and process-scale studies with mixtures of cellulase and hemicellulase enzymes for reducing the refining/beating energy requirement of different types of pulp. Those included hardwood kraft pulp, long fiber fraction of bamboo pulp, old corrugated containers (OCC), and mixed pulp containing new double-lined kraft cuttings (NDLKC) and long fiber fraction of bamboo pulp. In the laboratory, the refining energies were reduced by 18%-45% for different pulps with these enzymes. The strength properties of pulps were not affected by enzyme treatment. In the process-scale trials, use of one of the enzyme products in the production of high strength extensible sack kraft paper (ESKP) reduced the required refining energy by 25 kWh/metric ton of pulp. It also yielded savIngs in steam consumption per ton of paper of about 20% from various sections of the machine operation. The mill was able to bypass one double disc refiner (DDR) when the furnish was changed to 60%unbleached bamboo kraft pulp (long fraction) and 40% NDLKC for producing normal ESKP. This reduced the energy requirement by about 54 kWh/metric ton of pulp, with an 8% savings in steam consumption per ton of paper. The mill was able to produce high strength paper having high porosity without sacrificing other strength properties. Trials with the same enzyme in a mill producing mainly coated white paper showed a reduction in refining energy of about 70 kWh/metric ton of softwood pulp and 30 kWh/metric ton of hardwood pulp. Steam consumption on the paper machine was reduced by approximately 0.5 ton steam/metric ton of paper. By using enzymes, the mill eliminated a refining bottleneck in its softwood line and increased production by 12%. The strength properties of the pulps were not affected. In a mill producing heavy base papers, enzyme use enabled the mill to bypass one 180 kW triple disc refiner (TDR). Pulp strength and other properties were within the specified limits and comparable to those of the control. All these mills have started using enzyme on regular basis.
Journal articles
Biomechanical pulping with phlebiopsis gigantea reduced energy, TAPPI JOURNAL, September 2000, Vol. 83(9)
Biomechanical pulping with phlebiopsis gigantea reduced energy, TAPPI JOURNAL, September 2000, Vol. 83(9)
Journal articles
The Impact of the Summer Effect on Ink Detachment and Remova
The Impact of the Summer Effect on Ink Detachment and Removal
Journal articles
Fiber property modification by mechanical pretreatment, TAPPI JOURNAL, March 2002 (261KB)
Fiber property modification by mechanical pretreatment, SOLUTIONS! & TAPPI JOURNAL, March 2002 (261KB)
Journal articles
Surface sizing with cationic starch: its effect on paper quality and papermaking process, TAPPI JOURNAL, March 2002, Vol. 1(1) (280KB)
Surface sizing with cationic starch: its effect on paper quality and papermaking process, TAPPI JOURNAL, March 2002, Vol. 1(1) (280KB)
Journal articles
Effect of stripper off-gas burning on NOx emissions, TAPPI JOURNAL, March 2002, Vol. 1(1) (93KB)
Effect of stripper off-gas burning on NOx emissions, TAPPI JOURNAL, March 2002, Vol. 1(1) (93KB)
Magazine articles
Study tour to Sweden, TAPPI JOURNAL, March 2002, Vol. 1(1) (
Study tour to Sweden, TAPPI JOURNAL, March 2002, Vol. 1(1) (170KB)
Magazine articles
What does it take to get my paper published?, TAPPI JOURNAL,
What does it take to get my paper published?, TAPPI JOURNAL, March 2002, Vol. 1(1) (62KB)