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Pyrolysis kineticts of washed precipitated lignin

Christina Gustafsson (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik) ; Tobias Richards (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik)
BioResources (1930-2126). Vol. 4 (2009), 1, p. 26-37.
[Artikel, refereegranskad vetenskaplig]

This article describes the pyrolysis behavior of precipitated washed lignin in a Laminar Entrained Flow Reactor between 700 and 1000°C and at different residence times. Lignin was precipitated by acidification of softwood black liquor using CO2. After acid washing, the solid material was dried and sieved (80-100 μm). This material was then fed into the reactor at a rate of about 0.1 g/min. The formed gases were analyzed with respect to CO, CO2, and CH4, and char was collected and weighed. A traditional first order Arrhenius kinetic expression, based on the temperature of the particles with respect to residence time, was adapted to the experimental results. The activation energy was found to be 32.1 kJ/mol. The low ash content in the washed lignin gave a very low solid material residue after the reactor.

Nyckelord: Kraft lignin; Pyrolysis; Reaction kinetics; Laminar Entrained Flow Reactor



Denna post skapades 2009-02-20. Senast ändrad 2013-10-29.
CPL Pubid: 90153

 

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik (2005-2014)

Ämnesområden

Kemisk energiteknik

Chalmers infrastruktur