Na publikacji autorka Janus Paula podpisana jako Niebrzydowska Paula.
language:
English
journal language:
English
abstract in English:
CMK-3
carbon
replica
was
synthesized
by
carbonization
of
sucrose
introduced
to
the
pore
system
of
a
SBA-
15
hard
template
followed
by
dissolving
SiO
2
with
HF.
The
material
with
a
stable
hexagonal
structure
and
an
expanded
surface
area
(
S
BET
=
1287
m
2
/g)
was
obtained.
TG
measurements
showed
that
CMK-3
type
mesoporous
carbon
started
to
be
intensively
oxidized
by
molecular
O
2
above
723
K.
This
carbon
sample
was
tested
as
a
catalyst
of
dehydrogenation
of
propane
to
propene
under
oxidative
(O
2
:C
3
H
8
=
0.25,
0.50
and
1.00)
and
non-oxidative
(O
2
:C
3
H
8
=
0.00)
conditions
in
the
temperature
range
from
573
to
873
K.
The
propene
yield
increased
with
rise
in
the
reaction
temperature,
however
above
573
K
the
formation
of
side-
products
(C
2
H
6
,
C
2
H
4
,
CH
4
and
H
2
)
was
observed.
Moreover,
coke
was
deposited
on
the
catalyst
surface.
A
decrease
in
the
mass
of
a
catalyst
bed
after
the
catalytic
runs
suggested
the
participation
of
oxygen
in
burning
of
deposited
and
bulk
coke.
The
surface
composition
of
a
spent
catalyst
was
investigated
by
XPS
and
TPD
analysis.
The
changes
in
the
concentration
of
oxygen
functional
groups,
caused
by
the
catalytic
reaction,
were
observed
regardless
of
a
reaction
temperature
and
feed
composition.