Extracting lignin from kraft pulp for carbon fibrePromising research findings with carbon fibre from lignin are presented in a new doctoral thesis by Ida Norberg. On 20 April, Ida Norberg defended her doctoral thesis "Carbon fibres from kraft lignin" at Innventia in Stockholm.Her thesis shows that lignin, a substance that is found in wood but is removed during kraft pulp production, has great potential for use as a raw material for manufacturing carbon fibre. Carbon fibre is strong and light, with many applications. Today, demand is mainly limited by the high cost of production, with the petroleum-based raw material and fibre spinning accounting for around 50 percent of the cost. Thanks to LignoBoost technology, the pulp mill can extract extremely pure lignin which could be used for carbon fibre, thus increasing access to a raw material for carbon fibre. According to studies reported on in Ida's thesis, the cost of production could also be lowered by using lignin. LignoBoost has been developed in partnership between Innventia and Chalmers University of Technology. The process has been successfully demonstrated at Innventia's demonstration facility in Bäckhammar. The LignoBoost process, including patent rights, has been owned by Metso since 2008.  |
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