Making the most out of lignin – case Stora Enso Valmet Customer Days 2018
Maria Björk
Stora Enso Division Biomaterials Outline
• Introduction • Lignin extraction at Sunila Mill − Operational experience − Effects on Na&S balance − Lignin as lime kiln fuel • Lignin applications Stora Enso in brief
Everything that’s made with fossil-based materials today can be made from a tree tomorrow
Consumer Board Packaging Biomaterials Wood Products Paper Solutions Trees grow back Wooden buildings at Trummens Strand in Sweden
2 hours 3 6 300 m to grow equal amount of wood in CLT = an Austrian forest on a summer day
Image: GBJ Bygg Examples of our solutions replacing fossil-based materials today
Lignin can replace e.g. fossil-based EcoFishBox phenol in Dissolving adhesives by Stora pulp can be Enso can used for replace producing polystyrene Trayforma by textiles packaging Stora Enso can replace plastic in e.g. Wooden frozen food construction packaging elements can replace concrete in buildings Stora Enso Sunila Mill Kotka, Finland LignoBoost timeline
Valmet acquisition R&D Break- of LignoBoost through Pilot Demoplant Sunila Ideas trials Domtar start-up start-up
1997 1999 2001 2003 2004 2006 2008 2013 2015 The KAM programs The FRAM programs The LignoFuel program
Courtesy of RISE LignoBoost process
Liquor from di gester
1A 1B 1C Wash liquid
2 3 4 5 6
Liquor ~40% LignoBoost
Wash water Lignin pH 2.5 lean liquor H2SO4
LignoBoost Lignin
CO2 PrecipitationHigh pH (high pH) PurificationLow pH (low pH) Trademarked products
The Lineo™ family will have different lignin products tailor-made for the application:
• Lineo™ Prime
• Lineo™ Prime W
• Lineo™ Classic
• Lineo™ Classic W Trademarked products Mill prerequisites What would it take for a mill to extract lignin?
• Evaporator capacity
• Gas collection capacity
• Na/S balance
• Energy balance Mill prerequisites What would it take for a mill to extract lignin?
• Evaporator capacity
Degree of energy utilization (%) • Gas collection capacity 98
• Na/S balance 94
• Energy balance 90 2012 2013 2014 2015 2016 2017 Operational experiences Lignin production losses 2017
LignoBoost 15%
Pulp mill Dryer 48% 17%
Lignin burning 20% Operational experiences Stable lignin quality despite black liquor variations
BL DS (%) Residual alkali intermediate BL (g/l) Lignin ash (%)
Black liquor DS
Residual alkali
0 5 10 15 20 25 30 Days Sodium and sulphur balance
(S kg/Adt) 7
6
5
4
3
2
S in1 gases NaOH make-up 0 0123456789(Na kg/Adt) Sodium and sulphur balance
(S kg/Adt) 7
6 Lignin production 5
4
3
2
S in1 gases
0 0123456789(Na kg/Adt) Sodium and sulphur balance
(S kg/Adt) 16
14
12
10 Lignin
8
6 Lignin 4
2
0 0 2 4 6 8 101214161820(Na kg/Adt) Lignin as lime kiln fuel Co-firing of dried lignin powder and natural gas Lignin as lime kiln fuel Lignin as lime kiln fuel
NG HFO HFO Lignin S (wt%) 0 1 5 2 Sulphur in lignin <2 wt% or 800 g/GJ S (g/GJ) 0 230 1200 800
Lime mud Reburned lime Lime mud is always low in sulphur S (mg/kg DS) 200 2500
NG Lignin + NG BAT** TRS (mg/Nm3*)2 3 1-10 No increase in TRS, SO2 or NOx emissions after 3* scrubber when burning lignin compared to natural SO2 (mg/Nm ) 2-8 2-7 5-70 gas NOx (mg/Nm3*) 200-300 100-130 100-350
* At 6% O2 ** Gas fuels The Innovation Centre for biomaterials, Stockholm
~90 employees
4900 m2 including 1600 m2 laboratories
>30 customer projects related to lignin Lignin focus areas
Phenol replacement Scope to replace 20-50% of phenol in phenolic resins used for plywood, LVL, OSB and laminates
Carbon fiber Scope to use lignin and dissolving pulp for carbon fiber in automotive, transport and energy industries
Carbon materials Scope to convert lignin to carbon materials suitable as activated carbons and for energy storage Thank you! https://www.youtube.com/watch?v=L6uG-h-zbVc