Canadian Biomass Magazine

Processum’s project number 100

July 14, 2013
By Canadian Biomass

project100July 14, 2013 – Research and development project number 100 has started in the Swedish Processum cluster within the biorefinery sector. The aim of the project is to thermo chemically change lignin from the sulphate process black liquor to bio oil.

is run by the Swedish-Norwegian co-operation project "Biorefinery
Midscandinavia" and the project partners are Processum Biorefinery Initiative,
PFI, Metsa Board Sweden, Viken Skog (a Norwegian forest owner association) and
the Bergen University.

is an aromatic polymer, which is released in the pulp mills' sulphate cooking
sequence and ends up in the black liquor, it is then burnt and transformed into
heat energy in the recovery boilers. When pulp mills are run increasingly
energy efficient there may be an energy surplus in the form of steam. This
energy surplus makes it possible to remove some of the lignin from the process,
thus relieving the recovery boiler.

is a highly interesting project which might lead to less need of fossil fuels,"
says David Blomberg, project leader Processum. "We study the possibilities to
produce bio oil by depolymerizing the lignin to smaller components. The liquid
bio oil might be suitable as a substitute for heating oil internally at a pulp
mill as well as externally."

during the year we have an energy surplus, enabling us to remove lignin. This
would relieve the recovery boilers and also give us the possibility to refine
the lignin," says Stina Drotz, Laboratory Manager, Metsa Board Husum Mills. "We
hope that this trial will result in a technical possibility to convert lignin
towards bio oil, thus generating a new "green" product."

project will be finalized during this autumn.

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