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Journal articles
Modern NCG practice, TAPPI Journal July 2026
ABSTRACT: New innovations have been put in operation for collection and handling systems of noncondensable gases (NCGs) in modern kraft pulp mills. This work investigates technologies in new pulp mills that aim to achieve the benefits of odor-free processes while enhancing chemical circulation within the mill. It describes and discusses both past and current systems for collecting and handling NCGs. The mills studied have designed and implemented their NCG systems within the past 10 to 15 years. New innovations have emerged, offering promising methods to further reduce occasional sulfurous odor emissions from the kraft process. These methods explore pretreatment and sulfuric gas stream reuse options in process units where these gases are generated or during the transportation of these side streams to their final destruction site. Using modern practices outlined in this paper, malodorous gases can be collected to the extent that a kraft pulp mill is essentially odor-free pending operator errors or major equipment malfunctions. One of the difficult aspects is that NCG systems in kraft mills are often designed case-by-case, as well as by various equipment vendors and with varying numbers of destruction sites. The actual detailed design depends on the chosen layout, process configuration depending on individual equipment purchased, and even on the design practices of individual suppliers.
Journal articles
The effect of Stachys floridana Shuttlew.ex Benth extract as an additive on the chemical properties of chitosan biodegradable film, TAPPI Journal June 2025
ABSTRACT: The purpose of this study is to explore chitosan with Stachys floridana Shuttlew. ex Benth (SFSB) extract as an additive to prepare an active film. The effects of the SFSB extract on the physical, antioxidant, and bacteriostatic properties of chitosan biodegradable films were studied. The results showed that the addition of SFSB extract significantly improved the antioxidant and antibacterial properties of the film, and its biodegradation rate increased rapidly. Compared to the control film, the water solubility was lower at 19.40%, the expansion degree was higher at 288.90%, the water vapor permeability (WVP) was 0.364 g·mm/(m²·d·kPa), the surface hydrophobicity increased, and the mechanical strength was also improved. The contact angle increased to 89.3°. In addition, as the amount of SFSB increased, the thermal stability of chitosan-Stachys floridana Shuttlew. ex Benth (CS-SFSB) films also increased significantly, and their ultraviolet (UV) blocking ability was gradually enhanced. The results indicate that CS-SFSB has potential as a food packaging material.
Life Cycles for Pulp and Paper, 1996 Life Cycle Assessment Symposium Proceedings
Life Cycles for Pulp and Paper, 1996 Life Cycle Assessment Symposium Proceedings
Combining Chlorine Dioxide and Molybdate Catalyzed Hydrogen Peroxide for Improved Delignification of Canadian Hardwood and Softwood Pulp, 2011 International Pulp Bleaching Conference
Combining Chlorine Dioxide and Molybdate Catalyzed Hydrogen Peroxide for Improved Delignification of Canadian Hardwood and Softwood Pulp, 2011 International Pulp Bleaching Conference
Near-Neutral Final Chlorine Dioxide Brightening: Theory and Practice, 2011 International Pulp Bleaching Conference
Near-Neutral Final Chlorine Dioxide Brightening: Theory and Practice, 2011 International Pulp Bleaching Conference
TCF bleaching character of Soda-anthraquinone pulp from oil palm frond, 2011 International Pulp Bleaching Conference
TCF bleaching character of Soda-anthraquinone pulp from oil palm frond, 2011 International Pulp Bleaching Conference
Bleachability of Eucalypt Kraft Pulp Derived from Auto-Hydrolyzed Chips, 2011 International Pulp Bleaching Conference
Bleachability of Eucalypt Kraft Pulp Derived from Auto-Hydrolyzed Chips, 2011 International Pulp Bleaching Conference
The impact of hot-water extraction (HWE) of Northern Hardwoods on conventional bleach plant operations and potential chemical savings, 2011 International Pulp Bleaching Conference
The impact of hot-water extraction (HWE) of Northern Hardwoods on conventional bleach plant operations and potential chemical savings, 2011 International Pulp Bleaching Conference
On the Effect of Introducing Ozone in ECF Bleaching of Eucalyptus Kraft Pulp, 2011 International Pulp Bleaching Conference
On the Effect of Introducing Ozone in ECF Bleaching of Eucalyptus Kraft Pulp, 2011 International Pulp Bleaching Conference
Southern Pine Oxygen Delignified Pulps Produced in a Berty Throughflow Reactor: How to Obtain the Highest Degree of Delignification while Maintaining Pulp Yield and Quality, 2011 International Pulp Bleaching Conference
Southern Pine Oxygen Delignified Pulps Produced in a Berty Throughflow Reactor: How to Obtain the Highest Degree of Delignification while Maintaining Pulp Yield and Quality, 2011 International Pulp Bleaching Conference