Bioresource Technology Reports,
Journal Year:
2023,
Volume and Issue:
24, P. 101641 - 101641
Published: Sept. 28, 2023
This
paper
reviews
information
about
the
design
and
performance
of
existing
biochar
production
kilns
to
identify
areas
for
further
research
development.
The
kiln
designs
are
categorized
into
flame
curtain
kilns,
drum
pyrolytic
top-lit-updraft
cookstoves,
retort
masonry
others.
Depending
on
design,
reviewed
can
attain
yield
efficiency
10–46
%
produce
containing
26–87
fixed
carbon
with
a
calorific
value
14–40
MJ
kg−1.
Comparison
available
is
challenging
as
some
data
required
either
unavailable
or
derived
from
experiments
that
use
single
feedstock.
However,
qualitative
schematic
comparison
indicates
best
suited
most
applications
in
low-income
settings.
These
would
likely
be
improved
approach
theoretical
maximum
whilst
improving
quality
reducing
emission
levels,
by
combining
appropriate
features
other
kilns.
Polymers,
Journal Year:
2025,
Volume and Issue:
17(5), P. 628 - 628
Published: Feb. 26, 2025
The
growing
environmental
impact
of
textile
waste,
fueled
by
the
rapid
rise
in
global
fiber
production,
underscores
urgent
need
for
sustainable
end-of-life
solutions.
This
review
explores
cutting-edge
pathways
waste
management,
spotlighting
innovations
that
reduce
reliance
on
incineration
and
landfilling
while
driving
material
circularity.
It
highlights
advancements
collection,
sorting,
pretreatment
technologies,
as
well
both
established
emerging
recycling
methods.
Smart
collection
systems
utilizing
tags
sensors
show
great
promise
streamlining
logistics
automating
pick-up
routes
transactions.
For
automated
technologies
like
near-infrared
hyperspectral
imaging
lead
way
accurate
scalable
separation.
Automated
disassembly
techniques
are
effective
at
removing
problematic
elements,
though
other
pretreatments,
such
color
finish
removal,
still
to
be
customized
specific
streams.
Mechanical
is
ideal
textiles
with
strong
mechanical
properties
but
has
limitations,
particularly
blended
fabrics,
cannot
repeated
endlessly.
Polymer
recycling-through
melting
or
dissolving
polymers-produces
higher-quality
recycled
materials
comes
high
energy
solvent
demands.
Chemical
recycling,
especially
solvolysis
pyrolysis,
excels
breaking
down
synthetic
polymers
polyester,
potential
yield
virgin-quality
monomers.
Meanwhile,
biological
methods,
their
infancy,
natural
fibers
cotton
wool.
When
methods
not
viable,
gasification
can
used
convert
into
synthesis
gas.
concludes
future
hinges
integrating
sorting
advancing
solvent-based
chemical
technologies.
These
innovations,
supported
eco-design
principles,
progressive
policies,
industry
collaboration,
essential
building
a
resilient,
circular
economy.
Case Studies in Chemical and Environmental Engineering,
Journal Year:
2023,
Volume and Issue:
8, P. 100439 - 100439
Published: Aug. 2, 2023
-
They
use
technologies
for
the
thermochemical
conversion
of
substances
biomass,
like
pyrolysis,
torrefaction,
gasification,
and
hydrothermal
process.
In
recent
years,
generation
synthetic
gas
has
significantly
developed.
This
is
especially
true
when
associated
with
biomass
gasification
processes,
primarily
related
to
syngas
production.
The
review
focuses
on
cleaning
syngas,
simulation
methods
procedure
parameters.
conclusion,
prospect
growths
opportunities
are
investigated,
discussions
culminate
presentation
a
novel
hydrogen
fabrication
strategy
predicated
utilizing
modified
combustion
process
that
operates
such
an
air
deficit.
Energy Conversion and Management,
Journal Year:
2023,
Volume and Issue:
286, P. 117070 - 117070
Published: April 22, 2023
Fluidized
bed
biomass
gasification
is
a
complex
process
whereby
gas
source
terms
are
released
by
reactions
at
the
particle
level
during
movement
of
fuel
particles
throughout
reactor.
The
current
study
presents
for
first
time
application
multi-scale
modelling
approach
fluidized
gasifier
industrial
size,
coupling
detailed
one-dimensional
model
based
on
progressive
conversion
(PCM)
with
commercial
CFD
software.
Results
and
compared
results
an
additional
simulation
employing
simplified
uniform
(UCM)
which
commonly
used
in
literature.
Validation
showed
that
UCM
leads
to
massive
underprediction
needed
pyrolysis
whereas
PCM
good
agreement
experimental
data.
This
heavily
influences
sources
coupled
reactor
simulations.
Volatiles
much
more
concentrated
close
proximity
feed
when
using
homogeneous
distribution
over
cross-section.
calculation
analysis
simulations
despite
increased
complexity,
shows
only
increase
20%
UCM,
it
better
suited
these
conditions.
numerical
feasibility
1,200,000
parcels
about
80,000
reacting
furthermore
highlighted
importance
comprehensive
description
level.
AIChE Journal,
Journal Year:
2024,
Volume and Issue:
70(5)
Published: March 12, 2024
Abstract
The
understanding
of
complex
fluidization
hydrodynamics
and
chemical
reactions
in
biomass
fast
pyrolysis
fluidized
bed
reactors
is
lacking
requires
further
investigation.
It
urgent
to
develop
accurate
mathematical
models
capable
describing
the
multiphase
reaction
system
pyrolysis.
A
comprehensive
multiscale
model
based
on
coarse‐grained
discrete
element
method
(DEM)‐computational
fluid
dynamics
(CFD)
was
developed
open‐source
MFiX
code.
incorporates
detailed
kinetics
an
intraparticle
model.
To
validate
model,
measurements
were
conducted
a
pyrolyzer,
including
quantifying
segmental
pressure
drop
along
height
determining
yields
compositions
gas,
liquid,
solid
products.
particle
mixing
segregation,
axial
distribution
residence
time,
Lacey
index,
products
investigated.
study
provides
experimental
theoretical
foundations
for
designing
advancing
thermochemical
conversion.
