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Non-process elements in the recovery cycle of six Finnish kraft pulp mills, TAPPI Journal March 2023
ABSTRACT: In this work, the aim was to study the distribution and accumulation of the non-process elements (NPEs) in the recovery cycle of Finnish pulp mills and look at whether the geographical location (North vs. South) correlates with the current Finnish NPE levels. In addition, a comparison to older similar Finnish measurements was made with an attempt to analyze the reasons behind differences in the most typical non-process elements, aluminum (Al), silicon (Si), calcium (Ca), phosphorus (P), magnesium (Mg), manganese (Mn), chlorine (Cl), and potassium (K), taking into account the main elements in the white liquor, sodium (Na) and sulfur (S). The extensive laboratory results gained in this study are from seven sampling points at six pulp mills and present analytical data of metal concentrations. The data obtained presents an update to previous NPE studies. The levels found did not statistically differ between North and South Finland. The NPE levels, apart from phosphorus, found in Finnish pulp mills today have not changed considerably compared to the levels in earlier investigations in the 1990s. In the newest data, the phosphorus concentration was consistently higher in the as fired black liquor, electrostatic precipitator (ESP) ash, lime mud, and green liquor than in the previous results. In addition, the levels of Al, Si, Ca, P, and Mg in recovery boiler ESP ash were consistently higher compared to the older results. As the mills start to close their systems more, a stronger accumulation of NPEs can be expected, increasing the likelihood of more operational problems in the process. Further understanding of where the NPEs accumulate and how they can be most effectively removed will be valuable knowledge in the future.
Journal articles
Magazine articles
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.
Driving Forces for Change in the 1990's, 1991 International Mechanical Pulping Conference Proceedings
Driving Forces for Change in the 1990's, 1991 International Mechanical Pulping Conference Proceedings
From the Hole to the Hill: Automation at Niagara Paper PGW G
From the Hole to the Hill: Automation at Niagara Paper PGW Groundwood Installation, 1991 International Mechanical Pulping Conference Proceedings
Helical Grooving of Pulpstones: A Mill Scale Evaluation, 199
Helical Grooving of Pulpstones: A Mill Scale Evaluation, 1991 International Mechanical Pulping Conference Proceedings
Alkaline Peroxide Mechanical Pulping of High Density Hardwoods, 1991 International Mechanical Pulping Conference Proceedings
Alkaline Peroxide Mechanical Pulping of High Density Hardwoods, 1991 International Mechanical Pulping Conference Proceedings
Colour and UV-Visible Absorption Spectra of Mechanical and U
Colour and UV-Visible Absorption Spectra of Mechanical and Ultra-High Yield Pulps Treated with Alkaline Hydrogen Peroxide, 1991 International Mechanical Pulping Conference Proceedings
Resin Removal from Mechanical Pulps, 1991 International Mech
Resin Removal from Mechanical Pulps, 1991 International Mechanical Pulping Conference Proceedings
Evolution of the Team Management Concept at Lake Superior Pa
Evolution of the Team Management Concept at Lake Superior Paper Industries, 1991 International Mechanical Pulping Conference Proceedings
Technical and Marketing Challenges of New High Yield Market
Technical and Marketing Challenges of New High Yield Market Pulps, 1991 International Mechanical Pulping Conference Proceedings