SAE technical papers on CD-ROM/SAE technical paper series,
Год журнала:
2024,
Номер
1
Опубликована: Окт. 28, 2024
<div
class="section
abstract"><div
class="htmlview
paragraph">The
aviation
industry
is
undergoing
environmental
scrutiny
due
to
its
significant
greenhouse
gas
emissions.
Sustainable
fuels
(SAFs)
are
a
vital
solution
for
reducing
carbon
emissions
and
pollutants,
aligning
with
global
efforts
carbon-neutral
growth.
SAFs
can
be
produced
via
multiple
production
routes
from
different
feedstock,
resulting
in
significantly
physical
chemical
fuel
properties.
Their
suitability
compression-ignition
(CI)
aircraft
engine
was
evaluated
through
test
bench
investigations
at
TU
Wien
-
Institute
of
Powertrain
Automotive
Technology
partnership
Austro
Engine.
ASTM
D7566-certified
like
Hydrotreated
Vegetable
Oil
(HVO),
Fischer–Tropsch–Kerosene
(FTK)
or
Alcohol
Jet
(AtJ),
but
also
an
oxygen
containing
biodiesel
have
been
tested
extensively.
Gaseous
emissions,
soot
indication
measurement
data,
efficiencies,
the
were
acquired
comprehensively
analyzed
operation
blends.
Operation
all
investigated
could
demonstrated
successfully
three
representative
operating
points
original
setup.
At
constant
boundary
conditions,
neither
maximum
permitted
in-cylinder
pressure,
pressure
gradient,
exhaust
temperature
exceeded
(nevertheless,
adaption
injection
strategy
recommended).
Ignition
delay
combustion
duration—dependent
on
properties—greatly
influence
formation
incomplete
products
HC
CO
as
well
NO<sub>x</sub>
Especially
extremely
low
cetane
number
AtJ
leads
substantial
increase
premixed
combustion,
which
influences
depending
conditions.
A
aromatic
content
(as
found
HVO)
beneficial
HC,
CO,
absence
ring-like
molecule
structures.
Also,
reduced
adiabatic
flame
contributes
decreased
concentration.
The
high
known
soot,
while
it
increased
comparable
air/fuel
ratios
within
specific
point,
blends
exhibit
CO<sub>2</sub>
emissions.</div></div>
Applied and Environmental Microbiology,
Год журнала:
2024,
Номер
90(1)
Опубликована: Янв. 3, 2024
ABSTRACT
Catabolism
of
algal
polysaccharides
by
marine
bacteria
is
a
significant
process
carbon
cycling.
β1,3/1,4
-
Mixed-linkage
xylan
(MLX)
class
in
the
ocean,
widely
present
cell
walls
red
algae.
However,
catabolic
mechanism
MLX
remains
elusive.
Recently,
we
found
that
Bacteroidetes
strain,
Polaribacter
sp.
Q13,
specialist
degrading
MLX,
which
secretes
novel
MLX-specific
xylanase.
Here,
specialization
strain
Q13
to
was
studied
multiomics
and
biochemical
analyses.
Strain
catabolizes
with
canonical
starch
utilization
system
(Sus),
encoded
single
locus,
XUL-Q13.
In
this
system,
surface
glycan-binding
protein
SGBP-B
captures
specifically,
contributing
specificity.
The
xylanolytic
enzyme
unique,
enzymatic
cascade
dedicates
stepwise
hydrolysis
β1,3-
β1,4-linkages
extracellular,
periplasmic,
cytoplasmic
spaces.
Bioinformatics
analysis
growth
observation
suggest
other
strains
harboring
homologous
loci
also
preferentially
utilize
MLX.
These
results
reveal
degradation
Bacteroidetes,
leading
better
understanding
recycling
driven
bacteria.
IMPORTANCE
Red
algae
contribute
substantially
primary
production
ecosystems.
catabolism
important
for
β1,3/1,4-xylan
(MLX,
distinct
from
hetero-β1,4-xylans
terrestrial
plants)
an
abundant
polysaccharide,
whose
bacteria,
however,
largely
unknown.
This
study
reveals
promoting
our
sets
foundation
biomass
conversion
SAE technical papers on CD-ROM/SAE technical paper series,
Год журнала:
2024,
Номер
1
Опубликована: Окт. 28, 2024
<div
class="section
abstract"><div
class="htmlview
paragraph">The
aviation
industry
is
undergoing
environmental
scrutiny
due
to
its
significant
greenhouse
gas
emissions.
Sustainable
fuels
(SAFs)
are
a
vital
solution
for
reducing
carbon
emissions
and
pollutants,
aligning
with
global
efforts
carbon-neutral
growth.
SAFs
can
be
produced
via
multiple
production
routes
from
different
feedstock,
resulting
in
significantly
physical
chemical
fuel
properties.
Their
suitability
compression-ignition
(CI)
aircraft
engine
was
evaluated
through
test
bench
investigations
at
TU
Wien
-
Institute
of
Powertrain
Automotive
Technology
partnership
Austro
Engine.
ASTM
D7566-certified
like
Hydrotreated
Vegetable
Oil
(HVO),
Fischer–Tropsch–Kerosene
(FTK)
or
Alcohol
Jet
(AtJ),
but
also
an
oxygen
containing
biodiesel
have
been
tested
extensively.
Gaseous
emissions,
soot
indication
measurement
data,
efficiencies,
the
were
acquired
comprehensively
analyzed
operation
blends.
Operation
all
investigated
could
demonstrated
successfully
three
representative
operating
points
original
setup.
At
constant
boundary
conditions,
neither
maximum
permitted
in-cylinder
pressure,
pressure
gradient,
exhaust
temperature
exceeded
(nevertheless,
adaption
injection
strategy
recommended).
Ignition
delay
combustion
duration—dependent
on
properties—greatly
influence
formation
incomplete
products
HC
CO
as
well
NO<sub>x</sub>
Especially
extremely
low
cetane
number
AtJ
leads
substantial
increase
premixed
combustion,
which
influences
depending
conditions.
A
aromatic
content
(as
found
HVO)
beneficial
HC,
CO,
absence
ring-like
molecule
structures.
Also,
reduced
adiabatic
flame
contributes
decreased
concentration.
The
high
known
soot,
while
it
increased
comparable
air/fuel
ratios
within
specific
point,
blends
exhibit
CO<sub>2</sub>
emissions.</div></div>
