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Flow characteristics of drag-reducing natural bamboo fiber suspensions with minimal environmental load, TAPPI Journal September 2019
ABSTRACT: The reduction of pipe friction loss by adding drag-reducing agents has attracted attention as an aid to energy conservation. Drag-reducing agents induce drag reduction (DR) effects and should have a minimal environmental load, with natural resource-saving potential. This study demonstrates bamboo fiber as a drag-reducing agent that saves natural resources and has a low environmental load. Using pressure drop measurements, we report DR with suspensions of bamboo fibers with the average diameter of 13.3 µm and aspect ratio of 98.7. The maximum DR obtained in this experiment is 43% at the concentration of 4000 ppm and pipe diameter of 30 mm; DR is affected by the Reynolds number, suspension concentration, and pipe diameter. In addition, the bamboo fibers can be easily removed from the suspensions by filtration. We found that low-environmental-load bamboo fiber has DR effects like those of other fibers; its effects are greater than those of conventional synthetic fibers and wood pulp. Furthermore, it is resistant to mechanical degradation, recoverable, and recyclable. Therefore, DR effects can be selectively obtained by adding the fibers only when DR is needed; the fibers can then be collected when DR is no longer necessary. This method might greatly expand the application range of DR agents. The results demonstrate the usefulness of bamboo fibers as DR additives.
Journal articles
3-D Computational Simulation of Paper Handsheet Structure and Prediction of Apparent Density, TAPPI JOURNAL September 2009
3-D Computational Simulation of Paper Handsheet Structure and Prediction of Apparent Density, TAPPI JOURNAL September 2009
Journal articles
Decreasing specific energy of thermomechanical pulps from reduction of raw materials variability, TAPPI JOURNAL September 2009
Decreasing specific energy of thermomechanical pulps from reduction of raw materials variability, TAPPI JOURNAL September 2009
Journal articles
Pre-Extraction of Hemicelluloses and Subsequent Kraft Pulping, Part II: Acid- and Autohydrolysis, TAPPI JOURNAL September 2009
Pre-Extraction of Hemicelluloses and Subsequent Kraft Pulping, Part II: Acid- and Autohydrolysis, TAPPI JOURNAL September 2009
Journal articles
Retention of PCC and GCC Fillers on Chemical Pulp Fines Surfaces, TAPPI JOURNAL September 2009
Retention of PCC and GCC Fillers on Chemical Pulp Fines Surfaces, TAPPI JOURNAL September 2009
Journal articles
Optimization of ECF Bleaching of Kraft Pulp: Part 1. Optimal Bleaching of Hardwood Pulps Made with DifferentAlkali Charges, TAPPI JOURNAL January 2008
Optimization of ECF Bleaching of Kraft Pulp: Part 1. Optimal Bleaching of Hardwood Pulps Made with DifferentAlkali Charges, TAPPI JOURNAL January 2008
Journal articles
Characteristics of Black Liquor Sprays from Gas-Assisted Atomizers in High-Temperature Environments, TAPPI JOURNAL January 2008
Characteristics of Black Liquor Sprays from Gas-Assisted Atomizers in High-Temperature Environments, TAPPI JOURNAL January 2008
Journal articles
Measurement of Wet Fiber Flexibility of Mechanical Pulp Fibers by Confocal Laser Scanning Microscopy, TAPPI JOURNAL January 2008
Measurement of Wet Fiber Flexibility of Mechanical Pulp Fibers by Confocal Laser Scanning Microscopy, TAPPI JOURNAL January 2008
Journal articles
Improving chlorine dioxide bleaching efficiency by selecting the optimum pH targets, TAPPI JOURNAl, July 2008
Improving chlorine dioxide bleaching effiency by selecting the optimum pH targets, TAPPI JOURNAl, July 2008
Journal articles
Fiber trapping in low-consistency refining: new parameters to describe the refining process, TAPPI JOURNAl, July 2008
Fiber trapping in low-consistency refining: new parameters to describe the refining process, TAPPI JOURNAl, July 2008