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Journal articles
Gasification of Mixtures of Black Liquor and Secondary Sludge, TAPPI JOURNAL, March 2007
Gasification of Mixtures of Black Liquor and Secondary Sludge, TAPPI JOURNAL, March 2007
Journal articles
Associations in a Downsized Industry, Paper360º March 2007
Trade and Professional Associations Abound, But Are They Worth the Price of Admission?, Paper360º March 2007
Journal articles
TECHLINK, Problem Solved: Abitibi Reduces Sheet Breaks with Data-driven Approach, Paper360° March 2007 07MARPA21
Problem Solved, Paper360º March 2007
Journal articles
Experimental Investigation of Black Liquor Pyrolysis Using Single Droplet TGA, TAPPI JOURNAL, May 2007
Experimental Investigation of Black Liquor Pyrolysis Using Single Droplet TGA, TAPPI JOURNAL, May 2007
Journal articles
The polyelectrolyte behavior of randomly branched lignosulfonates, TAPPI JOURNAL , november 2007 07NOV10
The polyelectrolyte behavior of randomly branched lignosulfonates, TAPPI JOURNAL November 2007
Journal articles
When Downtime is a Good Thing, Paper360º November 2007
When Downtime is a Good Thing, Paper360º November 2007
Journal articles
The hemicellulose composition of pulp fibers and their ability to endure mechanical treatment, TAPPI JOURNAL, October 2007
The hemicellulose composition of pulp fibers and their ability to endure mechanical treatment, TAPPI JOURNAL, October 2007
Journal articles
Magazine articles
Pulp and Paper: Industries with a Bright Future, Paper360º January/February 2019
Pulp and Paper: Industries with a Bright Future, Paper360º January/February 2019
Journal articles
Magazine articles
Kraft pulp bleaching with a P-stage catalyzed by both bicarbonate and TAED, TAPPI Journal July 2019
ABSTRACT: Peroxide bleaching of softwood and hardwood (eucalypt) kraft pulps was performed in solutions of sodium bicarbonate (NaHCO3), sodium carbonate (Na2CO3), and sodium hydroxide (NaOH). The conventional P stage (hydrogen peroxide + sodium hydroxide; H2O2 + NaOH) was the most effective brightening system without an additional activator. However, peroxide activation by bicarbonate anion (HCO3•) was obvious in all cases where NaHCO3 or Na2CO3 was used. When N,N,N’,N’-tetraacetylethylenediamine (TAED) was added to the bleaching sys-tem, Na2CO3 as the alkali source afforded equal or slightly higher bleached brightness compared to NaOH usage for both the softwood and hardwood pulps. This outcome is attributed to simultaneous peroxide activation by HCO3• and TAED. When applied to the eucalypt pulp, the H2O2/Na2CO3/TAED bleaching system also decreased the bright-ness loss due to thermal reversion.
Journal articles
Magazine articles
Fundamental molecular characterization and comparison of the O, D0, and E stage effluents from hardwood pulp bleaching, TAPPI Journal 2019
ABSTRACT: The present study characterized effluents from the O, D0, and E stages using nuclear magnetic reso-nance (NMR) and gel permeation chromatography (GPC) techniques to better understand the chemical nature of the dissolved organics formed from the bleaching of a high-yield hardwood kraft pulp. Understanding the structures and molecular weight distribution of these organics is the first step in developing methods to mitigate these contam-inates in the discharged effluents. The results indicated that the molecular weight distribution (MWD) of the dis-solved organics from oxygen delignification effluent is broader than those from D0 and E stage effluents. In addition, the O stage filtrate contained considerable amounts of lignin and xylan fragments, which showed its efficiency in removing such materials. The effluent from the D0 stage contained a lower amount of high molecular weight frag-ments and a higher amount of low molecular weight fragments versus the O-stage filtrate. Aromatic structures were nearly absent in the D0 stage filtrate, but the degraded organic material, presumably from oxidized lignin, contained olefinic (C=C) and carbonyl (C=O) functional groups. Furthermore, higher molecular weight fragments were detected in the E-stage effluent, presumably due to the extensive solubilization and removal of the oxidized lignin generated from the D0 pulp.