Dalton Transactions,
Год журнала:
2023,
Номер
52(23), С. 7975 - 7981
Опубликована: Янв. 1, 2023
The
efficient
separation
of
CO
2
from
CH
4
and
N
is
essential
for
the
upgrading
biogas
reducing
carbon
emissions
in
flue
gas,
but
challenging
energy
industry.
International Journal of Chemical Engineering,
Год журнала:
2023,
Номер
2023, С. 1 - 11
Опубликована: Янв. 19, 2023
Oxygen,
an
odorless
and
colorless
gas
constituent
of
the
atmosphere,
is
a
vital
component
for
Earth,
as
it
makes
up
21%
composition
air
we
breathe.
Apart
from
importance
oxygen
human
breathing,
its
highly
pure
form
demanding
industrial
applications.
As
such,
several
technologies
have
been
established
to
increase
purity
somewhat
higher
than
95%.
One
competitive
producing
this
high-purity
through
pressure
swing
adsorption
(PSA),
which
has
advantages
low
cost
energy
while
being
efficient.
Also,
PSA
simple
flexible
system
due
ability
start
shut
down
more
rapidly
since
operation
occurs
at
ambient
temperature,
enabled
use
adsorbents
bind
separate
molecules.
The
enhancement
PSA’s
performances
was
reported
modification
step
cycles
material
(zeolite)
tailoring.
A
simplified
complete
set
mathematical
model
included
modelling
system,
aiming
ease
experimental
burden
process
design
optimization
infinite
cycles.
Finally,
some
technological
production
via
PSA,
particularly
onboard
generation
oxy-enriched
incineration
municipal
solid
waste,
discussed.
Continuous
development
will
make
significant
contributions
wide
range
chemical
industries
in
near
future,
be
or
other
separation
Energies,
Год журнала:
2024,
Номер
17(9), С. 2099 - 2099
Опубликована: Апрель 27, 2024
The
conversion
of
lignocellulosic
agricultural
waste
into
biofuels
and
other
economically
valuable
compounds
can
reduce
dependence
on
fossil
fuels,
harmful
gas
emissions,
support
the
sustainability
natural
resources,
including
water,
minimize
amount
in
landfills,
thus
reducing
environmental
degradation.
In
this
paper,
wastes
biomethane,
biohydrogen,
biodiesel,
bioethanol,
biobutanol,
bio-oil
is
reviewed,
with
special
emphasis
primary
secondary
residues
as
substrates.
Some
novel
approaches
are
mentioned
that
offer
opportunities
to
increase
efficiency
valorization,
e.g.,
hybrid
systems.
addition
physical,
chemical,
biological
pretreatment
waste,
some
combined
methods
mitigate
negative
effects
various
recalcitrant
processing
(alkali-assisted
thermal
pretreatment,
hydrolysis
alkali
bioaugmentation)
evaluated.
addition,
production
volatile
fatty
acids,
polyhydroxyalkanoates,
biochar,
hydrochar,
cellulosic
nanomaterials,
selected
platform
chemicals
from
described.
Finally,
potential
uses
recovered
products
discussed.
Journal of Molecular Liquids,
Год журнала:
2023,
Номер
391, С. 123196 - 123196
Опубликована: Сен. 29, 2023
Biogas
produced
from
anaerobic
digestion
of
organic
materials
is
emerging
as
a
renewable
energy
source.
Unfortunately,
the
large
quantities
CO2
contained
in
raw
biogas
greatly
decreases
its
calorific
value,
thus
efficient
separation
needed
to
upgrade
biomethane.
Several
technologies,
based
on
physical
or
chemical
sorption
CO2,
are
already
available
but
they
suffer
some
drawbacks,
primarily
related
their
negative
impact
environment
and/or
high
requirements.
Development
alternative
green
upgrading
technologies
therefore
needed,
and
research
growing
exponentially
this
field.
As
consequence,
frequent
assessment
state
art
these
rapidly
evolving
required.
This
review
summarizes
latest
advances
strategies
for
unconventional
solvents
such
ionic
liquids
deep
eutectic
clathrate/semi
clathrate
hydrates,
which
low
cost,
ease
operation
environmental
sustainability
represent
attractive
advantages
over
conventional
technologies.
In
particular,
present
work
focused
performance
sorbent
systems
terms
CO2/CH4
selectivity
rather
than
absorption
capacity.
Indeed,
most
important
parameter
evaluating
suitability
practical
applications,
means
negligible
CH4
losses.
The
scientific
results
published
last
few
years
have
been
collected
discussed
serve
guide
researchers
choosing
optimal
technology
operating
conditions
perspective
environmentally
friendly
biogas.
Ionic
excellent
candidates
upgrading,
especially
form
hybrid
systems,
show
best
selectivity.
Similarly,
via
hydrates
can
be
considered
efficient,
cost-effective.
However,
drawbacks
still
need
addressed.