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Author:Björnström, Carina
Title:Techno-economic evaluation of lignocellulose-based chemicals
Teknisk-ekonomisk utvärdering an lignocellulosa baserade kemikalier
Publication type:Master's thesis
Publication year:2012
Pages:vii + 80 + [1]      Language:   eng
Department/School:Biotekniikan ja kemian tekniikan laitos
Main subject:Biokemia ja mikrobiologia   (Kem-30)
Supervisor:Laakso, Simo
Instructor:Kautto, Jesse ; Bergroth, Katja
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
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Location:P1 Ark Aalto  2038   | Archive
Keywords:polylactic acid
PLA
succinic acid
lignocellulose
straw
bärnstenssyra
polymjölksyra
lignocellulosa
halm
Abstract (eng): Increasing oil prices, environmental concern and new potential markets have in the past years driven chemical industry to use alternative raw materials such as biomass.
So far commercial solutions for bio-based chemicals rely on biomass which is part of the food chain.
When these processes are being up-scaled the use of food as raw material will not be sustainable.
To solve this problem, new and improved technologies are being developed to make lignocellulose a viable raw material option.
The aim of this Master's thesis was to perform a techno-economic evaluation on the production of polylactic acid and succinic acid from straw.

In the lignocellulose based chemical production several different upstream and downstream processing methods have been developed and the literature part of this Master's thesis presents the most potential ones.
The literature part also includes general information on the chemicals and their current and future markets.

In the feasibility study a possible production process for each chemical is presented and described in detail.
The investment and production costs were calculated for the designed processes and the results were compared to existing production plants that use non-lignocellulosic biomass as feedstock.

Based on this study it is uneconomical to produce polylactic acid and succinic acid form straw despite of lower raw material costs.
The total production costs for the designed lignocellulosic processes of polylactic acid and succinic acid are 37 % and 84 % higher than current market prices for respective chemicals.
This indicates that further development is needed to make lignocellulose an economically competitive raw material option.
Abstract (swe): Under den senaste tiden har stigande oljepriser och strängare miljökrav av allmanheten lett till ett stort intresse for produktionen av biokemikalier.
I dagens läge är dock biokemikalierna ofta tillverkade av råmaterial som även kan anvandas som mat.
Detta är ett problem som kan finna sin lösning i nya och förbättrade processeringsmetoder för lignocellulosa.
Syftet med detta diplomarbete är att utföra en teknisk-ekonomisk utvärdering av produktionen av polymjölksyra och bärnstenssyra frän halm.

Flera olika processeringsmetoder har utvecklats för produktionen av kemikalier frän lignocellulosa.
Metoderna med de största industriella potentialerna ar beskriva i litteraturdelen av detta arbete.
Litteraturdelen inkluderar även en allmän beskrivning på polymjölksyra och bärnstenssyra och deras nuvarande och framtida marknad.

I arbetets experimentella del beskrivs en möjlig halmbaserad produktionsprocess för var och en av kemikalierna.
De valda processerna analyseras sedan på basen av investerings och produktions kostnader.
Resultaten jämförs med rapporterade produktionsanläggningsinvesteringar och nuvarande marknadspris för dessa kemikalier då de är tillverkade av icke-lignocellulosa baserad biomassa.

På basen av denna studie är det olönsamt att producera polymjölksyra och bärnstenssyra from halm trots att råmaterialkostnaderna är lägre.
De totala produktionskostnaderna för polymjölksyra är 37 % högre än marknadspriset och för bärnstenssyran 84 % högre an marknadspriset.
Detta tyder på att vidare undersökning och utveckling bör ske för att lignocellulosa skall bli det attraktivare råmaterialalternativet.
ED:2012-05-24
INSSI record number: 44635
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