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@PHDTHESIS{Vlker:1012484,
author = {Völker, Simon},
othercontributors = {von der Aßen, Niklas Vincenz and Bardow, André and
Leitner, Walter},
title = {{M}ulti-scale life cycle design of synthetic fuels for
sustainable mobility; 1. {A}uflage},
volume = {55},
school = {RWTH Aachen University},
type = {Dissertation},
address = {Aachen},
publisher = {Wissenschaftsverlag Mainz GmbH},
reportid = {RWTH-2025-05015},
isbn = {978-3-95886-544-0},
series = {Aachener Beiträge zur Technischen Thermodynamik},
pages = {1 Online-Ressource : Illustrationen},
year = {2025},
note = {Druckausgabe: 2025. - Auch veröffentlicht auf dem
Publikationsserver der RWTH Aachen University; Dissertation,
RWTH Aachen University, 2024},
abstract = {Global transport is among the main emitters of greenhouse
gas (GHG) emissions, requiring a paradigm shift away from
burning fossil fuels towards integrating renewable energy.
While renewable energy integration via direct
electrification is most sensible, some transport subsectors
are hard to electrify directly: aviation, shipping, and
long-haul heavy-duty trucks. For these subsectors, renewable
synthetic fuels pose promising complements for direct
electrification. However, the environmental benefits of
synthetic fuels are not a given and require thorough
validation. Therefore, this thesis guides the life cycle
assessment and design of synthetic fuels by addressing major
research questions in the screening, filtering, and
distribution of synthetic fuels. For synthetic fuel
screening, we identify those key environmental objectives
that cover the major trade-offs of integrated process and
fuel design. Our findings suggest that the objectives land
use, resource use of minerals and metals, and production
cost are sufficient to design spark-ignition engine fuels
holistically but with manageable computational cost.
Integrated process and fuel design with these objectives
reveals that bio-hybrid fuels can balance the
burden-shifting of pure bio- and e-fuels. The group of
synthetic fuels obtained from screening has to be further
narrowed by filtering out only those for more detailed
analyses that address the four key challenges of current
synthetic fuels. Our study on hydroformylated
Fischer-Tropsch (HyFiT) fuels demonstrates that HyFiT-fuels
can fulfill these key challenges simultaneously: they (1)
are scalable by using mature technologies, (2) are
compatible with fuel standards and current engine
technology, (3) reduce urban air pollutants, and (4) enable
the transition to net-zero GHG emissions. In a fleet, the
filtered out synthetic fuels could be distributed either as
pure fuels to few or as blends with fossil fuel to all
vehicles. Our fleet analysis shows that the environmentally
optimal distribution depends on how combustion emissions
develop with increasing blending ratios. For
polyoxymethylene dimethyl ethers of chain length three to
five (OME3-5), distribution as a blend is optimal since
increasing blending ratios of OME3-5 in diesel decrease
combustion emissions disproportionately strong.},
cin = {412110},
ddc = {620},
cid = {$I:(DE-82)412110_20140620$},
pnm = {DFG project G:(GEPRIS)390919832 - EXC 2186: Das Fuel
Science Center – Adaptive Umwandlungssysteme für
erneuerbare Energie- und Kohlenstoffquellen (390919832)},
pid = {G:(GEPRIS)390919832},
typ = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
doi = {10.18154/RWTH-2025-05015},
url = {https://publications.rwth-aachen.de/record/1012484},
}
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