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Semi-regenerative
catalytic reforming catalysts
Aimed at
Treating
naphtha feed to produce high quality high octane number
gasoline blending components and chemical aromatics. The
by-product hydrogen can be used in hydrofining of oil
distillates to produce environment-friendly oil products.
Features
of series catalysts
√
Employed a carrier with high crystal purity, low
impurities, concentrated micro-pores and high crashing
strength, which allow high dispersion of Pt and Re,
provide good thermal stability and good regenerative
performance.
√ Catalyst CB-8 and CB-5B has been
regenerated for over 5 times, accumulated run length of
CB-8 is over 7 years, accumulated run length of CB-5B is
over 9 years, accumulated run length of CB-11 has reached
4 years.
√ CB-8 has ultra-low Pt content and low
manufacturing costs, it also symbolize that refineries
could save their costs on catalyst procurement.
√ CB-8 has high ratio of Re/Pt and good
stability, it shows high performance under low or middle
pressure(0.8-1.8MPa).
√ CB-5B has low ratio of Re/Pt and shows
high performance under high pressure (1.8-2.8MPa).
√ CB-11 has proper ratio of Re/Pt and shows
high performance under low or middle pressure(0.8-1.8MPa).
Especially, when it was combined used with CB-8, higher
activity, selectivity, stability and regenerativity were
proven.
Commercial
results
Commercial
results of catalyst CB－8
|
Refinery |
Dalian |
Lanzhou |
Shijiazhuang |
Dagang |
|
Feed
aromatics potential/m％ |
40.13 |
32.30 |
43.43 |
|
|
Operating
conditions: |
|
|
Inlet
average temperature/℃ |
495.6 |
480.0 |
494.3 |
|
|
WABT/℃ |
489.2 |
466.6 |
484.9 |
468-478 |
|
HPS
pressure/MPa |
0.98 |
1.72 |
1.32 |
1.10 |
|
LHSV/h-1 |
1.90 |
1.65 |
1.57 |
1.27-1.79 |
|
H2/oil(v/v) |
1684 |
|
1142/1684 |
-- |
|
Results: |
|
|
Yield
of de-pentane oil/m% |
88.33 |
81.71 |
88.69 |
90.0-93.0 |
|
Yield
of stabilizer naphtha/m% |
-- |
-- |
92.23 |
-- |
|
Aromatic
contents/m% |
57.36 |
48.08 |
60.57 |
-- |
|
Aromatic
yields/m% |
50.69 |
39.29 |
53.69 |
-- |
|
Aromatics
conversion/% |
126.3 |
122.0 |
123.7 |
-- |
|
Purity
of recycle hydrogen/v% |
90.9 |
-- |
90.4 |
88.91 |
Commercial
results of CB－5B
|
Refinery |
Shanghai |
Shengli |
|
Feed
aromatics potential/m% |
38.34 |
54.35 |
|
Operating
conditions:
Inlet
average temperature/℃ WABT/℃
HPS
pressure/MPa
LHSV/h-1 |
500.0
486.5
1.8
2.7
|
500.3
483.2
1.95
2.25
|
|
Results：
Yield
of de-pentane oil/m%
Aromatic
contents/m%
Aromatic
yields/m%
Aromatics
conversion/%
Purity
of recycle hydrogen/v% |
87.81
47.48
41.69
108.7
91.0
|
90.01
52.51
48.31
88.9
89.0
|
Commercial
results of CB-11/CB-8 combined used in Harbin Refinery
|
Items |
Case
1 |
Case
2 |
Case
3 |
|
Time |
98.8.13 |
99.1.23 |
99.6.2 |
|
Feed
aromatics potential/m% |
44.83 |
|
|
|
Operating
conditions：
Inlet
average temperature/℃
WABT/℃
HPS
pressure/MPa
LHSV/h-1 |
498.6
484.2
1.0
2.35
|
493.8
486.1
1.0
1.83
|
491.8
481.0
1.0
2.28
|
|
Results：
Yield
of stabilizer naphtha/m%
Aromatic
yields/m%
Aromatics
conversion/%
Purity
of recycle hydrogen/v%
RON |
87.65
52.51
117.10
89.00
95.0
|
87.68
52.55
118.51
95.8
|
87.78
49.86
122.82
87.35
95.0
|
CB-11/CB-8
combined catalyst system was put into commercial
application in a reformer of Harbin refinery in 1998. The
original designed capacity of the reformer is 0.2Mt/a,
with increasing catalyst loading merely, the capacity was
increased to 0.25Mt/a in May 2001. Stable run was achieved
2 weeks after, RONC of gasoline reached 95-96.8. Though
the LHSV was forced to be increased because of the
additional feed injected into the reactors, the operation
was very stable by mean of adjusting the reaction
temperature and sometimes showed better selectivity. The
produced fuels were environment-friendly, purity of
recycle hydrogen was maintained 85.5-90.0% during the
operation.
Commercial
experiences of low operation pressure CB-11/CB-8 combined
catalyst system
Lowering
the operation pressure will be favored to the
aromatization reactions, increase the yields of liquids,
aromatics and pure hydrogen, increase purity of recycle
hydrogen and save investment and operation costs for the
refiners. Low operation pressure CB-11/CB-8 combined
catalyst system developed in FRIPP, SINOPEC can be
operated under 0.88MPa, which is of the same pressure
level of first generation CCR. The commercial operation
illustrated that qualified target products the same as
that of CCR was obtained. Refiners has gotten much more
profits from this unit compared with using CCR.
Belows
are the results from a new constructed reformer applied
low operation pressure CB-11/CB-8 combined catalyst
system, the data also show the potential economics of this
technology.
Commercial
results of CB-11/CB-8 combined catalyst system
|
Feed
properties |
|
Boiling
range/℃ |
60~180 |
|
PONA/m% |
52.66/--/34.74/12.62 |
|
Aromatics
potential/m% |
44.91 |
|
Operating
conditions |
|
Average
pressure/MPa |
0.86 |
1.47 |
|
Inlet
temperature/℃ |
500 |
500 |
|
Total
temperature drop/℃ |
175 |
147 |
|
WABT/℃ |
484.9 |
488.4 |
|
Gas/oil(v/v) |
1200 |
1200 |
|
Hydrogen/oil(mol/mol) |
7.0 |
6.6 |
|
LHSV/h-1 |
2.0 |
2.0 |
|
Results |
|
C5+
liquid yield/m% |
88.86 |
86.10 |
|
Aromatics
potential of product/m% |
66.08 |
65.88 |
|
RONC
of product |
95.5 |
95.9 |
|
Aromatics
yield/m% |
58.72 |
56.72 |
|
Aromatics
conversion/％ |
130.8 |
126.3 |
|
Purity
of recycle hydrogen/v% |
90.33 |
85.21 |
|
Fresh
hydrogen yield/m% |
2.90 |
2.50 |
Notes:
R1 and R2 were loaded with CB－11,
R3 and R4 were loaded with CB－8.
Volume ratioof catalyst CB-11 to CB-8 was 25v%/75v%,
average Pt content
was
0.175%
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