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Magazine articles
Open Access
Deinking difficulties related to ink formulation, printing process, and type of paper, TAPPI JOURNAL, June 2000, Vol. 83(6)

Deinking difficulties related to ink formulation, printing process, and type of paper, TAPPI JOURNAL, June 2000, Vol. 83(6)

Magazine articles
Open Access
Industry leaders: jukka harmala leads stora enso into new global age, TAPPI JOURNAL, May 2000, Vol. 83(5)

Industry leaders: jukka harmala leads stora enso into new global age, TAPPI JOURNAL, May 2000, Vol. 83(5)

Magazine articles
Open Access
A personal mount st. helens experience, TAPPI JOURNAL, May 2000, Vol. 83(5)

A personal mount st. helens experience, TAPPI JOURNAL, May 2000, Vol. 83(5)

Magazine articles
Open Access
Energy: recovering capital and cutting costs, TAPPI JOURNAL, November 2000, Vol. 83(11)

Energy: recovering capital and cutting costs, TAPPI JOURNAL, November 2000, Vol. 83(11)

Magazine articles
Open Access
Reliability of stainless alloy equipment in chlorine dioxide bleaching, TAPPI JOURNAL, November 2000, Vol. 83(11)

Reliability of stainless alloy equipment in chlorine dioxide bleaching, TAPPI JOURNAL, November 2000, Vol. 83(11)

Magazine articles
Open Access
Using climate change policies for u.s. pulp and paper industry efficiency, TAPPI JOURNAL, July 2000, Vol. 83(7)

Using climate change policies for u.s. pulp and paper industry efficiency, TAPPI JOURNAL, July 2000, Vol. 83(7)

Magazine articles
Open Access
Calcium based sulfur recovery process for kraft black liquor gasification - proof of concept', TAPPI JOURNAL, July 2000, Vol. 83(7)

Calcium based sulfur recovery process for kraft black liquor gasification - proof of concept', TAPPI JOURNAL, July 2000, Vol. 83(7)

Magazine articles
Open Access
The use of oxidized white liquor as a caustic replacement in o, eo, eop, and e2 bleaching stages of kraft hardwood and softwood pulp, TAPPI JOURNAL, June 2000, Vol. 83(6)

The use of oxidized white liquor as a caustic replacement in o, eo, eop, and e2 bleaching stages of kraft hardwood and softwood pulp, TAPPI JOURNAL, June 2000, Vol. 83(6)

Journal articles
Magazine articles
Open Access
In-situ green synthesis and adsorption on methylene blue of copper-based metal organic framework/cellulose/chitosan (CCTSA/HKUST-1) composite aerogel, TAPPI Journal October 2024

ABSTRACT: In order to explore the application of metal-organic frameworks (MOFs) in environmental and water treatment fields, a new composite aerogel of HKUST-1/cellulose/chitosan (CCTSA/HKUST-1) with better hydrostability was synthesized by an in-situ synthesis method combining covalent cross-linking and solvothermal methods as an efficient adsorbent for methylene blue (MB). The composite aerogel (CCTSA) obtained by covalent cross-linking of cellulose (CE) and chitosan (CTS) exhibited excellent stability under strong acid and solvent-thermal conditions. With the increase of CTS content, it was beneficial to the in-situ synthesis of HKUST-1, as well as to increase the mass loading rate of HKUST-1 to 37.06%, while the Brunauer-Emmett-Teller (BET) specific surface area of CCTSA/HKUST-1 composite aerogel reached 945.123 m2·g-1, which was much higher than that of the CCTSA composite aerogel (14.489 m2·g-1). The CCTSA/ HKUST-1 composite aerogel exhibited excellent adsorption capacity (537.6 mg·g-1) on MB solution, and cyclic adsorption could be achieved. This study proposes a concept of valorization of alkaline peroxide mechanical pulping (APMP) waste liquor to hemicellulose-based hydrogel. This hemicellulose-based hydrogel exhibits a sensitive temperature/pH dual response. Hemicellulose-based hydrogels swell or shrink through the change of hydrogen bond/electrostatic repulsion/charge screening. They also show good water absorption and water retention properties.

Journal articles
Magazine articles
Open Access
Biofuels in lime kilns • Operating experience in the Nordic pulp and paper industry, TAPPI Journal October 2024

ABSTRACT: The lime reburning process is a central part of the chemical pulp mill. It is energy intensive and consumes large amounts of fossil fuel, globally consuming about 50 terawatt-hours (TWh) of fuel per year. Conversion to operation with biofuel is interesting, both to reduce carbon dioxide emissions and to reduce costs. Researchers interviewed managers in mills that use solid, liquid, or gasified biofuels to replace fuel oil or natural gas in their lime kilns, and they conducted surveys related to fuel consumption and operations and maintenance. In Sweden and Finland, there were ten mills in 2020 using biomass powder or gasified biomass as the primary fuel, and two more installations were under construction. There were also nine installations in operation or under construction outside the Nordic countries. Fourteen mills in Sweden and two mills in Finland used tall oil pitch as the main fuel. Fuel consumption in Swedish lime kilns was 3.8 TWh in 2020, and 90% of this energy was supplied with biofuels. Of about 4.2 TWh used in Finnish lime kilns, approximately 45% was supplied with biofuels. Developments in the design of the fuel supply system include belt dryers being used in all new installations and mass flow metered dosing systems being used in most new pulverized fuel installations. Bark gasifiers have increased considerably in size. Lignin powder firing has been established as a proven option. A solution for many Swedish and Finnish mills is the use of tall oil pitch as a replacement for fuel oil.

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