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Journal articles
Open Access
Breakup Mechanisms of Brittle Deposits in Kraft Recovery Boilers â?¢ A Fundamental Study, TAPPI JOURNAL September 2009

Breakup Mechanisms of Brittle Deposits in Kraft Recovery Boilers • A Fundamental Study, TAPPI JOURNAL September 2009

Journal articles
Open Access
Environmental benefits of magnesium hydroxide-based peroxide bleaching of mechanical pulp â?¢ mill results, TAPPI JOURNAL June 2013

Environmental benefits of magnesium hydroxide-based peroxide bleaching of mechanical pulp • mill results, TAPPI JOURNAL June 2013

Journal articles
Open Access
Effectiveness of magnesium oxide additives in mitigating fouling problems in kraft recovery boilers, TAPPI JOURNAL June 2013

Effectiveness of magnesium oxide additives in mitigating fouling problems in kraft recovery boilers, TAPPI JOURNAL June 2013

Journal articles
Open Access
Estimating ink mileage of dry toners in electrophotography, TAPPI JOURNAL March 2013

Estimating ink mileage of dry toners in electrophotography, TAPPI JOURNAL March 2013

Journal articles
Open Access
Structure characterization of ground calcium carbonate flocs by fractal analysis and their effects on handsheet properties, TAPPI JOURNAL March 2013

Structure characterization of ground calcium carbonate flocs by fractal analysis and their effects on handsheet properties, TAPPI JOURNAL March 2013

Journal articles
Open Access
CFD-modeling of fume formation in kraft recovery boilers, TAPPI JOURNAL March 2013

CFD-modeling of fume formation in kraft recovery boilers, TAPPI JOURNAL March 2013

Journal articles
Open Access
Effect of carboxymethylcellulose and starch depressants on recovery of filler and fines in tertiary flotation, TAPPI JOURNAL March 2013

Effect of carboxymethylcellulose and starch depressants on recovery of filler and fines in tertiary flotation, TAPPI JOURNAL March 2013

Journal articles
Open Access
Electrochemical Removal of Color and Toxicity from Bleached

Electrochemical Removal of Color and Toxicity from Bleached Kraft Effluents, 1994 Environmental Conference Proceedings

Journal articles
Magazine articles
Open Access
Technological evaluation of Pinus maximinoi wood for industrial use in kraft pulp production, TAPPI Journal August 2021

ABSTRACT: This study characterized Pinus maximinoi wood and evaluated its performance for pulp production. Samples of Pinus taeda wood were used as reference material. For both species, wood chips from 14-year-old trees were used for the technological characterization, pulping, bleaching process analysis, and pulp properties. A modified kraft pulping process was carried out targeting kappa number 28±5% on brownstock pulp. The bleaching sequence was applied for bleached pulp with final brightness of 87±1 % ISO. Refinability and resistance properties were measured in the bleached pulps. Compared to P. taeda wood, P. maximinoi showed slightly higher basic density (0.399 g/cm³) and higher holocellulose (64.5%), lignin (31.1%), and extractives content (4.5%), along with lower ash content (0.16%). P. maximinoi tracheids showed greater wall thickness (6.4 µm) when compared to P. taeda tracheids. For the same kappa number, P. maximinoi and P. taeda resulted in similar screened yield, with an advantage observed for P. maximinoi, which resulted in lower specific wood consumption (5.281 m³/o.d. metric ton), and lower black liquor solids (1.613 metric tons/o.d. metric ton). After oxygen delignification, P. maximinoi pulp showed higher efficiency on kappa reduction (67.2%) and similar bleaching chemical demand as P. taeda pulp. Compared to P. taeda pulps, the refined P. maximinoi pulps had similar results and the bulk property was 10% higher. Results showed that P. maximinoi is an interesting alternative raw material for softwood pulp production in Brazil.

Journal articles
Magazine articles
Open Access
Can carbon capture be a new revenue opportunity for the pulp and paper sector?, TAPPI Journal August 2021

ABSTRACT: Transition towards carbon neutrality will require application of negative carbon emission technologies (NETs). This creates a new opportunity for the industry in the near future. The pulp and paper industry already utilizes vast amounts of biomass and produces large amounts of biogenic carbon dioxide. The industry is well poised for the use of bioenergy with carbon capture and storage (BECCS), which is considered as one of the key NETs. If the captured carbon dioxide can be used to manufacture green fuels to replace fossil ones, then this will generate a huge additional market where pulp and paper mills are on the front line. The objective of this study is to evaluate future trends and policies affecting the pulp and paper industry and to describe how a carbon neutral or carbon negative pulp and paper production process can be viable. Such policies include, as examples, price of carbon dioxide allowances or support for green fuel production and BECCS implementation. It is known that profitability differs depending on mill type, performance, energy efficiency, or carbon dioxide intensity. The results give fresh understanding on the potential for investing in negative emission technologies. Carbon capture or green fuel production can be economical with an emission trade system, depending on electricity price, green fuel price, negative emission credit, and a mill’s emission profile. However, feasibility does not seem to evidently correlate with the performance, technical age, or the measured efficiency of the mill.

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