Biofuels produced from forest residues are much discussed in a Swedish context, among other things due to concerns for climate change. However, the undertaking of climate performance calculations is not an exact science. To examine whether climate concerns may be met by biofuels produced from forest residues, a literature review was carried out, analysing studies across methodologies. The scope for the literature review was limited to climate performance calculations for biofuels produced from forest residues harvested in Sweden. Five articles have been chosen for presentation, whereof one was carried out according to ISO 14040:2006 methodology, two according to climate performance calculations as stipulated by RED, two according to cumulative radiative forcing (CRF) and one according to a bottom up model using data from demo plants in Sweden (one study covers both ISO and RED methodology). All five studies presented in this paper suggest that climate performance of biofuels produced from forest residue (harvested in Sweden) show significantly better climate performance than fossil fuels. The local, environmental effects as well as future potential for harvesting of forest residue were also explored. A synthesis report on local, environmental effects suggests that the local, environmental effects are small. Furthermore, it is concludes that the effects on SOC are minor. Lastly, it is suggested that there is potential of increased harvesting of forest residue in Sweden in the magnitude of 30 TWh. / Biobränslen producerade av skogsavfall diskuteras mycket i en svensk kontext. Eftersom beräkningar av klimatprestanda inte är en exakt vetenskap, utfördes en litteraturstudie för att undersöka utifall biobränslen producerade från skogsavfall kan uppfylla förväntad klimatprestanda. Litteraturstudien avgränsades till beräkningar av klimatprestanda för biobränslen producerade av svenskt skogsavfall. Fem artiklar valdes ut, varav en använde sig av ISO 14040:2006 metodologi, två utfördes enligt RED, två enligt strålningsberäkningar och slutligen en som använt sig av data från demo fabriker i Sverige. Alla fem studierna visar att biobränslen producerade från svenskt skogsavfall har signifikant bättre klimatprestanda i jämförelse med fossila bränslen. De lokala miljömässiga effekterna samt framtida potential undersöktes. En syntesrapport drog slutsatsen att de lokala miljömässiga effekterna var små. Vidare, drogs slutsatsen i en annan rapport att effekterna på kol i marken var små. Slutligen uppskattades den framtida öka potentialen av ett ökat uttag av skogsbränsle till ca 30TWh per år.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:kth-189256 |
| Date | January 2016 |
| Creators | Hellmér, Elin |
| Publisher | KTH, Industriell ekologi |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | TRITA-IM-KAND 2016:28 ; 28 |
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