| 1. |
- Gourdon, Mathias, 1980, et al.
(författare)
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Pulp mill biorefineries
- 2013
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Ingår i: International Process Integration Jubilee Conference, Gothenburg, Sweden, March 18-20 2013.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Badr, Sara, 1985, et al.
(författare)
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Combined basic and fine chemical biorefinery concepts with integration of processes at different technology readiness levels
- 2018
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Ingår i: Computer Aided Chemical Engineering. - 1570-7946. ; 43, s. 1577-1582
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Biorefineries offer promising alternatives to the use of fossil fuels to produce energy and chemicals. This work describes the development of a biorefinery concept to produce adipic acid from Swedish forest residues and lutein from micro-algae. A description is provided for each process line available, its technology readiness level (TRL) and the tools available to model it. Scenarios of the integrated concept are built with associated material flow analysis. Key results of the material inventory of the base case scenario are presented as well as insights into the development of further scenarios. Material flow inventories can then be further used for economic and environmental assessment. Major challenges of integration are discussed in terms of uncertainties and data gaps for processes with low TRL such as scaling up lab experiments, understanding the restrictions of material recycling and its impact on process performance. The feedback given through these scenarios can help guide further experimental efforts.
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| 3. |
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| 4. |
- Beiron, Johanna, 1992, et al.
(författare)
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The role of BECCS in providing negative emissions in Sweden under competing interests for forest-based biomass
- 2022
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Negative emissions are needed to meet climate mitigation targets and can be achieved through the capture and storage of biogenic CO2 emissions (BECCS). Sweden holds a large potential for BECCS from the industry and heat and power sectors. This work provides a first assessment of how the conditions for BECCS in Sweden are impacted by competition for forest-based biomass from other sectors, in this work represented by production of transportation fuels. An optimization model is applied to study how demand levels for negative emissions and biofuels, and availability of forestry resources, influence the optimal system design considering the electricity, district heating and biomass sectors. BECCS and direct air capture technologies are available for investments in the model. The results show that biomass availability and biofuel demand have a large impact on the choice of negative emission technology, where high competition for biomass favours DACCS rather than BECCS. The available biomass is prioritized for use in fuel production and sets the upper limit for BECCS. In this work, CHP plants are more competitive for BECCS implementation than pulp mills, due to the energy penalty for CHP plants having a smaller impact on the overall energy system performance. The findings indicate that in addition to considering techno-economic assessments of individual technologies, it is important to take into account the system context in which they operate.
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| 5. |
- Bengtsson, Fredrik, 1989, et al.
(författare)
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A new method of scaling the gramian based input-output pairing methods for improved results
- 2018
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- A key problem in the application of process control systems is to decide which inputs should control which outputs. There are multiple ways to solve this problem, among them using gramian based measures, which include the Hankel interaction index array, the participation matrix and the Σ2 method. These methods take into account system dynamics as opposed to many other methods which only consider the steady-state system. However, the gramian based methods have issues with input and output scaling. Generally, this is resolved by scaling all inputs and outputs to have equal range. We will, however, demonstrate how this can result in an incorrect pairing. Further, we examine scaling of the gramian based measures, using either row or column sums, or by utilizing the Sinkhorn-Knopp algorithm instead. Then, to more systematically analyze the benefits of the scaling schemes, a multiple input multiple output model generator is used to test the different schemes on a large number of systems. This, along with implementation of automatic controller tuning, allows for a statistical comparison of the scaling methods. This assessment shows considerable benefits to be gained from the alternative scaling of the gramian based measures, especially when using the Sinkhorn-Knopp algorithm. The use of this method also has the advantage that the results are completely independent of the original scaling of the inputs and outputs.
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| 6. |
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| 7. |
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| 8. |
- Bengtsson, Fredrik, 1989, et al.
(författare)
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Resolving issues of scaling for gramian-based input–output pairing methods
- 2022
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Ingår i: International Journal of Control. - : Informa UK Limited. - 0020-7179 .- 1366-5820. ; 95:3, s. 679-691
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Tidskriftsartikel (refereegranskat)abstract
- A key problem in process control is to decide which inputs should control which outputs. There are multiple ways to solve this problem, among them using gramian-based measures, which include the Hankel interaction index array, the participation matrix and the (Formula presented.) method. The gramian-based measures, however, have issues with input and output scaling. Generally, this is resolved by scaling all inputs and outputs to have equal range. However, we demonstrate how this can result in an incorrect pairing and examine alternative methods of scaling the gramian-based measures, using either row or column sums or by utilising the Sinkhorn-Knopp algorithm. To systematically analyse the benefits of the scaling schemes, a multiple-input multiple-output model generator is used to test the different schemes on a large number of systems. This assessment shows considerable benefits to be gained from the alternative scaling of the gramian-based measures, especially when using the Sinkhorn-Knopp algorithm.
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| 9. |
- Beyer, Luisa I., et al.
(författare)
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Mimicking Nonribosomal Peptides from the Marine Actinomycete Streptomyces sp. H-KF8 Leads to Antimicrobial Peptides
- 2023
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Ingår i: ACS Infectious Diseases. - 2373-8227. ; 10:1, s. 79-92
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Tidskriftsartikel (refereegranskat)abstract
- Microorganisms within the marine environment have been shown to be very effective sources of naturally produced antimicrobial peptides (AMPs). Several nonribosomal peptides were identified based on genome mining predictions of Streptomyces sp. H-KF8, a marine Actinomycetota isolated from a remote Northern Chilean Patagonian fjord. Based on these predictions, a series of eight peptides, including cyclic peptides, were designed and chemically synthesized. Six of these peptides showed antimicrobial activity. Mode of action studies suggest that two of these peptides potentially act on the cell membrane via a novel mechanism allowing the passage of small ions, resulting in the dissipation of the membrane potential. This study shows that though structurally similar peptides, determined by NMR spectroscopy, the incorporation of small sequence mutations results in a dramatic influence on their bioactivity including mode of action. The qualified hit sequence can serve as a basis for more potent AMPs in future studies.
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| 10. |
- Bokinge, Pontus, et al.
(författare)
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Effects of process decarbonisation on future targets for excess heat delivery from an industrial process plant
- 2020
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Ingår i: Eceee Industrial Summer Study Proceedings. - 2001-7987 .- 2001-7979. - 9789198387865 ; , s. 233-242
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Konferensbidrag (refereegranskat)abstract
- The use of industrial excess heat for purposes such as district heating has the potential to contribute to societal targets for energy efficiency and greenhouse gas emissions reduction. However, to meet the ambitious national and international climate targets set for 2050, a breadth of different decarbonisation pathways are required, not least in the industrial sector. These include a transition to bio-based and recycled feedstock and fuels, carbon capture and storage, and electrification. Such profound changes of industrial processes and energy systems are likely to affect the availability of excess heat from these plants, and a better understanding of how the excess heat potentials might change is needed in order to utilise excess heat in ways that can be resource-efficient also in the long-term. In this paper, we present a systematic approach which can be used to analyse how different decarbonisation options may affect the potential future availability of excess heat at a specific plant site. The approach is based on the use of consistent, energy targeting methods based on pinch analysis tools, and therefore relies on comprehensive data about process heating and cooling demands. To illustrate the approach, we demonstrate results from two industrial case studies in which different decarbonisation measures are assumed to be implemented. The case studies were selected from a case study portfolio, which includes relevant and site-specific process and energy data for a large share of Swedish industrial process sites. The results show that deep decarbonisation can have significant impact on the availability and temperature profile of industrial excess heat, illustrating the importance of accounting for future process development when estimating excess heat potentials.
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