GLORIA

GEOMAR Library Ocean Research Information Access

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    In: Fuel, Elsevier BV, Vol. 342 ( 2023-06), p. 127763-
    Type of Medium: Online Resource
    ISSN: 0016-2361
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2023
    detail.hit.zdb_id: 1483656-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    Online Resource
    Online Resource
    Frontiers Media SA ; 2021
    In:  Frontiers in Energy Research Vol. 9 ( 2021-11-23)
    In: Frontiers in Energy Research, Frontiers Media SA, Vol. 9 ( 2021-11-23)
    Abstract: Different processes have been proposed to meet the global need for renewable fuel. The Biomass to Liquid process (BtL) converts biomass via the Fischer-Tropsch route to hydrocarbon chains that can be refined to transport fuel. With the addition of electrolytic hydrogen to the Power and Biomass to Liquid process (PBtL), the carbon efficiency can be increased relative to the BtL process. It was shown in previous studies that the PBtL concept has an economic edge over BtL when cheap electricity is available to maximize the fuel yield. In this study, a techno-economic analysis is conducted for a hybrid process concept which can switch operation modes from electrolysis enhanced to only biomass conversion. In case studies the effect of the Fischer-Tropsch conversion, H 2 /CO ratio of the Fischer-Tropsch feed and the biomass feed rate in the electrolysis enhanced mode are analyzed. Every process configuration is modeled based on experimentally validated unit models from literature in the commercial software Aspen Plus and analyzed using DLR’s software tool TEPET. For a 200 MW th biomass input plant, production costs of 1.08 € 2019 /L for the hybrid concept with a carbon efficiency of 53.3% compared to 0.66 € 2019 /L for BtL with 35.4% and 1 € 2019 /L for PBtL with 61.1% were found based on the Finnish day-ahead market for the base case. The net production cost for the hybrid concept can be decreased by 0.07 € 2019 /L when a Fischer-Tropsch H 2 /CO ratio of 1.6 instead of 2.05 is used.
    Type of Medium: Online Resource
    ISSN: 2296-598X
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2733788-1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2023
    In:  Biomass Conversion and Biorefinery
    In: Biomass Conversion and Biorefinery, Springer Science and Business Media LLC
    Abstract: The European Union guides its member states to a gradual uptake of sustainable aviation fuel (SAF) from 2% vol. in 2025 to 63% vol. by 2050 with the ReFuelEU proposal as part of the Fit-for-55 package. A promising production pathway for SAF presents itself in the Power Biomass to Liquid (PBtL) process, which converts non-crop-based biomass residue and renewable power via the Fischer–Tropsch route. In this study, a techno-economic and greenhouse gas (GHG) emission analysis of a small-scale (50 MW th ) PBtL process concept, developed in the EU project FLEXCHX, is presented. The analysis is conducted with a thermodynamic process model implemented in Aspen Plus ® , which relies on experimental project data. For the PBtL base case production costs of 1.09 € 2020 /l are estimated, whereby electricity and investment into the alkaline electrolyzer constitute the largest cost drivers. At low electricity prices ( 〈  39.2 €/MWh), the PBtL process is more cost effective than the reference process Biomass to Liquid (BtL). To identify improvements to the base case design, different design options are considered under varying economic boundary conditions: Solid oxide electrolysis is more economic than alkaline electrolysis at higher electricity prices due to its higher system efficiency. Maximizing the product yield by increased CO 2 recycling is only economically reasonable below an electricity price threshold, which is found at 20 €/MWh for the base case. Further, PBtL is heavily dependent upon the availability of low GHG electricity in order to produce SAF with a low carbon footprint. Assuming full utilization of the EU’s non-crop-based biomass residues, the EU jet fuel demand for 2030 could be met with the PBtL process.
    Type of Medium: Online Resource
    ISSN: 2190-6815 , 2190-6823
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2592298-1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    In: Sustainable Energy & Fuels, Royal Society of Chemistry (RSC), Vol. 7, No. 17 ( 2023), p. 4229-4246
    Abstract: Sustainable aviation fuels offer the opportunity to reduce the climate impact of air transport while avoiding a complete overhaul of the existing fleet. For Europe, the domestic production of sustainable aviation fuel would even lead to a reduced dependency on energy imports. Biomass-based fuel production in Europe is limited by the availability of sustainable biomass. This limitation can be alleviated by the Power and Biomass to Liquid (PBtL) process, which attains near full biogenic carbon conversion to Fischer–Tropsch fuel by the addition of electrolytic hydrogen. This study evaluates the economic feasibility and environmental impact of the sustainable aviation fuel production from European forest residue based on a region-specific analysis. As of 2020, only a few sweet spots, such as Norway or Sweden, could serve as production sites for sustainable PBtL fuel when the electrical energy for the electrolysis is supplied by the national grid. The grid mix for many other countries is too carbon intensive to justify producing PBtL fuel there. Yet, with the direct usage of renewable electricity sources, a fuel output of 25 Mt a −1 can be reached assuming 33% of all forest residue can be used for fuel production. Under these conditions, the EU goal of providing 32% of the total aviation fuel demand with sustainable aviation fuel in 2040 could be met.
    Type of Medium: Online Resource
    ISSN: 2398-4902
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
    detail.hit.zdb_id: 2882651-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    In: Schizophrenia Bulletin, Oxford University Press (OUP), Vol. 47, No. 3 ( 2021-04-29), p. 849-863
    Abstract: Negative symptoms such as anhedonia and apathy are among the most debilitating manifestations of schizophrenia (SZ). Imaging studies have linked these symptoms to morphometric abnormalities in 2 brain regions implicated in reward and motivation: the orbitofrontal cortex (OFC) and striatum. Higher negative symptoms are generally associated with reduced OFC thickness, while higher apathy specifically maps to reduced striatal volume. However, it remains unclear whether these tissue losses are a consequence of chronic illness and its treatment or an underlying phenotypic trait. Here, we use multicentre magnetic resonance imaging data to investigate orbitofrontal-striatal abnormalities across the SZ spectrum from healthy populations with high schizotypy to unmedicated and medicated first-episode psychosis (FEP), and patients with chronic SZ. Putamen, caudate, accumbens volume, and OFC thickness were estimated from T1-weighted images acquired in all 3 diagnostic groups and controls from 4 sites (n = 337). Results were first established in 1 discovery dataset and replicated in 3 independent samples. There was a negative correlation between apathy and putamen/accumbens volume only in healthy individuals with schizotypy; however, medicated patients exhibited larger putamen volume, which appears to be a consequence of antipsychotic medications. The negative association between reduced OFC thickness and total negative symptoms also appeared to vary along the SZ spectrum, being significant only in FEP patients. In schizotypy, there was increased OFC thickness relative to controls. Our findings suggest that negative symptoms are associated with a temporal continuum of orbitofrontal-striatal abnormalities that may predate the occurrence of SZ. Thicker OFC in schizotypy may represent either compensatory or pathological mechanisms prior to the disease onset.
    Type of Medium: Online Resource
    ISSN: 0586-7614 , 1745-1701
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2021
    detail.hit.zdb_id: 2180196-4
    SSG: 15,3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 6
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2022
    In:  BMC Geriatrics Vol. 22, No. 1 ( 2022-12)
    In: BMC Geriatrics, Springer Science and Business Media LLC, Vol. 22, No. 1 ( 2022-12)
    Abstract: A pandemic of loneliness is hitting the aging population. As COVID19 forced us to isolate ourselves, we are in a better position to understand consequences of social distancing. The recent literature showed that older incarcerated adults are particularly at risk of health-related complications due to isolation in the prison environment, reducing their social capital. Mental and physical health can be severely affected by loneliness and social isolation, especially in prison. Methods Our qualitative study investigates the view of older persons deprieved of their liberty on loneliness and social isolation pertaining to their mental health. We interviewed 57 older participants, including imprisoned individuals and forensic patients, following a semi-structured interview guide. During the data management and data analysis process, we excluded 7 interviews which were of poorer quality. Thereafter, we analyzed the remainders following a thematic approach. Results Most interviewees experience loneliness following lack of significant human relationships in prison. Making friends appears to be a challenge for all the participants, because, for one thing, they do not find people with similar interests. Also, secure institution setting aggravates isolation due to the restrictions of movement placed such as rules concerning movement between floors, hindering intimate relationship, and separation between friends. Moreover, contact with prison personnel is limited and lack social capital (e.g. trust). Conclusion To our knowledge, this study is one of the first to present incarcerated persons’ perspective on loneliness, social isolation and poor social capital in the Swiss prison setting. These has been reported to cause health problems both somatic and psychological. Our participants experience these deleterious factors in detention. As prisons have the possibility to become a health-promoting environment through connectedness, friendship, and trust promotion, stakeholders need to better their social capital.
    Type of Medium: Online Resource
    ISSN: 1471-2318
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2059865-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 7
    In: Journal of Shoulder and Elbow Surgery, Elsevier BV, Vol. 24, No. 11 ( 2015-11), p. 1685-1693
    Type of Medium: Online Resource
    ISSN: 1058-2746
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2015
    detail.hit.zdb_id: 2046901-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...