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Publications (3 of 3) Show all publications
Pettersson, K., Lundberg, V., Anheden, M. & Fuglesang, M. (2018). Systems analysis of different value chains based on domestic forest biomass for the production of bio-SNG. International journal of energy research (Print), 42(6), 2117-2140
Open this publication in new window or tab >>Systems analysis of different value chains based on domestic forest biomass for the production of bio-SNG
2018 (English)In: International journal of energy research (Print), ISSN 0363-907X, E-ISSN 1099-114X, Vol. 42, no 6, p. 2117-2140Article in journal (Refereed) Published
Abstract [en]

This study compares value chains based on domestic forest biomass for the production of bio-synthetic natural gas (SNG) with respect to economic performance, GHG emissions, and energy efficiency. Value chains in which raw material is upgraded to intermediate products before transportation to an SNG plant integrated with a district heating system for further upgrading are compared with a chain in which the raw material is transported directly to the SNG plant. The intermediates considered are either dried biomass from forest residues, or bark, upgraded at pulp mills, or pellets from sawdust upgraded at sawmills. The findings show that the difference in performance between the studied value chains is generally small. The highest cost and significantly lowest energy efficiency are associated with the value chain with pellets, which leads to the conclusion that more pretreatment than what is required by the SNG process, to lower transport costs, is not profitable. Drying forest residues at pulp mills before further transportation to and upgrading at an SNG plant leads to somewhat higher transportation costs because of the relatively high fixed costs associated with transportation. However, the benefit of drying the biomass using excess heat at pulp mills is that heat is "moved" from a location, where it can be hard to find profitable ways to use it, to the SNG plant, where the excess heat can be used for district heating. With these two factors working in opposition, the total cost is similar if forest residues are transported directly to the SNG plant or via a pulp mill. The lowest cost is achieved when falling bark from pulp mills is used because the first transportation step is avoided and no additional investment for biomass handling at the mill is required. However, there is a technical uncertainty regarding how much bark can be used in the SNG process.

Keywords
Bark, Biomass drying, Forest residues, Gasification, Intermediate product, Sawdust, SNG, Supply chains, Systems analysis, Biomass, Costs, District heating, Drying, Energy efficiency, Forestry, Gas emissions, Greenhouse gases, Investments, Materials handling, Paper and pulp mills, Pelletizing, Profitability, District heating system, Economic performance, Forest residue, Synthetic natural gas, Transport costs, Transportation cost, Transportation
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33464 (URN)10.1002/er.3992 (DOI)2-s2.0-85041674088 (Scopus ID)
Available from: 2018-03-09 Created: 2018-03-09 Last updated: 2019-06-24Bibliographically approved
Fahnestock, J., Norström, M., Johnson, A., Olsson, M., Johansson, N., Brolin, M., . . . Östling, H. (2016). RISEnergy: Roadmaps for energy innovation in Sweden through 2030.
Open this publication in new window or tab >>RISEnergy: Roadmaps for energy innovation in Sweden through 2030
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2016 (English)Report (Other academic)
Abstract [en]

RISE Research Institutes of Sweden is a group of research and technology organisations. RISE is a leading innovation partner working global cooperation with academia, enterprise and society to create value, growth and competitiveness through research excellence and innovation.

In the area of Energy, RISE has developed innovation Roadmaps covering:

  • Energy Efficient Transport
  • Electric Power System
  • Energy Efficient and Smart Buildings
  • Sustainable Thermal Processes
  • Efficient Energy Use in Industry
  • Decarbonisation of Basic Industries

These Roadmaps describe development pathways for technologies, non-technical elements (market design, user behaviours, policies, etc.) and key actors that deliver on a plausible, desirable vision for each respective innovation area in 2030. These Roadmaps are intended to support RISE’s strategic planning and development, but should be relevant reading for anyone interested in energy innovation in Sweden.

Publisher
p. 102
Keywords
energy, innovation, roadmap, research, institutes, transport, buildings, power, electricity, industry, efficiency, thermal processes, ccs, ccus, decarbonisation, Energi, innovation, roadmap, forskning, institut, transport, byggnader, kraftstystem, el, industri, effektivisering, termiska processer, ccs, ccus, avkarbonisering
National Category
Energy Systems
Identifiers
urn:nbn:se:ri:diva-28181 (URN)
Available from: 2017-02-15 Created: 2017-02-15 Last updated: 2018-08-23Bibliographically approved
Svensson, E., Lundberg, V., Jansson, M., Xiros, C. & Berntsson, T. (2016). The effect of high solids loading in ethanol production integrated with a pulp mill. Chemical engineering research & design, 111, 387-402
Open this publication in new window or tab >>The effect of high solids loading in ethanol production integrated with a pulp mill
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2016 (English)In: Chemical engineering research & design, ISSN 0263-8762, E-ISSN 1744-3563, Vol. 111, p. 387-402Article in journal (Refereed) Published
Abstract [en]

In this paper, two ethanol processes integrated with a softwood pulp mill are compared with regard to their steam demand, process integration potential and profitability. The processes differ in the solids loading in the simultaneous saccharification and fermentation step and in the resulting ethanol concentration. The results show that a higher ethanol concentration does not necessarily lead to significant reductions in steam demand. Instead, it is demonstrated that the steam demand for distillation is highly dependent on the design of the distillation plant. Nevertheless, a higher solids loading (high gravity) can be beneficial for the treatment of the stillage from the distillation plant. A higher solids loading results either in a lower steam demand for evaporation of the stillage or possibly in a reduced demand for effluent treatment compared to a conventional solids loading process. While the results show that a higher ethanol concentration leads to advantages in energy costs and investment costs for the distillation plant, they also show that the potential benefits of a high-gravity process are offset by the expected decrease in ethanol yield, which leads to higher raw material costs.

Keywords
Biorefinery, Ethanol, High gravity, Pinch analysis, Pulp mill, Techno-economic assessment
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-12634 (URN)10.1016/j.cherd.2016.05.026 (DOI)2-s2.0-84979298728 (Scopus ID)
Available from: 2016-09-15 Created: 2016-09-15 Last updated: 2019-06-19Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1589-222x

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