Search

TAPPI News, Paper360º November/December 2024

ASPI News, Paper360º November/December 2024

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.

Impact and Opportunity: Meeting the Needs of Young Professionals, Paper360º September/October 2024

Pixelle Mill in Jay, ME, Jay, ME, Paper360º September/October 2024

The Challenges Ahead for the Global Tissue Industry, Tissue360º Spring/Summer 2024

Over the Wire, Paper360º January/February 2025

New TIP Touts a Hands-on Approach to Safety, Paper360º January/February 2025

Employee Selection Can Help Weather the ´Silver Tsunami’, Paper360º January/February 2020

Employee Selection Can Help Weather the ´Silver Tsunami’, Paper360º January/February 2020

Business Cycles • Questions Executives Need to Ask, Paper360º January/February 2020

Business Cycles • Questions Executives Need to Ask, Paper360º January/February 2020