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Integrated production of biogas and cellulosic ethanol: A potential source for renewable vehicle fuels
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes.ORCID iD: 0000-0002-0635-7372
(English)Manuscript (preprint) (Other academic)
Keyword [en]
Anaerobic digestion, Biogas, Fermentation, Lignocellulosic ethanol, Renewable vehicle fuels
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:kth:diva-105118OAI: oai:DiVA.org:kth-105118DiVA: diva2:570065
Note

QS 2012

Available from: 2012-11-16 Created: 2012-11-16 Last updated: 2012-11-16Bibliographically approved
In thesis
1. Energy systems studied of biogas: Generation aspects of renewable vehicle fuels in the transport system
Open this publication in new window or tab >>Energy systems studied of biogas: Generation aspects of renewable vehicle fuels in the transport system
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The transport sector is seen as particularly problematic when concerns about climate change and dependency on fossil energy are discussed. Because of this, bioenergy is strongly promoted for use in the transport sector, both on a European level and nationally in Sweden. Even though bioenergy is considered one of the key solutions, it is generally agreed that both supply- and demand-side measures will be needed to achieve a change to a more sustainable transport system. One of the reasons for this is the limited availability of biomass, especially agricultural feedstocks competing with food or feed production. Woody biomass, however more abundant, is also exposed to tough competition from other sectors. In this thesis, the role of biogas as a vehicle fuel in a future sustainable transport system is discussed together with the prerequisites needed to realise such a transport system. Biogas is a biofuel that could be produced in several different ways: by anaerobic digestion, which is a first-generation production route, by gasification, which is a second-generation process, and by catalytic reduction of carbon dioxide, a third-generation technology. The main focus in this thesis is on biogas produced by anaerobic digestion and the results show that there is a significant potential for an increase compared to today’s production. Biogas from anaerobic digestion, however, will only be able to cover a minor part of the demand in the Swedish transport sector. Considering biogas of the second and third generations, the potential for production is more uncertain in a mid-term future, mainly due to competition for feedstock, the possibility to produce other fuels by these processes, and the present immaturity of the technology. The limited potential for replacing fossil vehicle fuels, either by biogas or other renewable fuels, clearly shows the need for demand-side measures in the transport system as well. This thesis shows the importance of technical and non-technical means to decrease the demand for transport and to make the transport as efficient as possible. The results show that both energy-efficient vehicles and behavioural and infrastructural changes will be required. Policies and economic incentives set by governments and decision-making bodies have a prominent role to play, in order to bring about a shift to a more sustainable transport system, however, measures taken on individual level will also have a great impact to contribute to a more sustainable transport system.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. xiii, 67 p.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2012:54
Keyword
Anaerobic digestion, biogas, biomass, energy system, first-generation biofuels, renewable vehicle fuels, second-generation biofuels, supply- and demand-side measures, third-generation biofuels, transport system
National Category
Chemical Engineering
Identifiers
urn:nbn:se:kth:diva-105120 (URN)978-91-7501-516-3 (ISBN)
Public defence
2012-12-07, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20121116

Available from: 2012-11-16 Created: 2012-11-16 Last updated: 2012-12-18Bibliographically approved

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Alvfors, Per

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