H2Tech - Q4 2021 - 38

INFRASTRUCTURE AND DISTRIBUTION
port facility would be a more economical
solution.
LNG value chain. The LNG vector consists
of the four key process blocks shown
in FIG. 5. LNG liquefaction takes place in
Qatar before transportation to the UK.
Regasification and H2
place in the UK, delivering H2
ural gas grid. The captured CO2
is then
liquefied and transported back to Qatar.
FIG. 6 shows a more detailed block
production take
to the natflow
diagram of the LNG vector with
the key material balance.
TABLES 2, 3
and 4 are related to the different process
blocks in FIG. 6. Each table shows the capacity
of the individual unit and whether
one or more units are required based on
the largest-capacity references found in
literature. A 30-yr CAPEX plus annual
OPEX for the major feeds and utilities
are converted into a specific H2
FIG. 5. LNG vector process blocks.
TABLE 2. LNG liquefaction
Value chain block
LNG liquefaction
LNG capacity
Number of units
Capital cost
Operations and maintenance
Natural gas feed requirement
Power consumption
Total operating cost
Total cost
TABLE 3. LNG regasification
Value chain block
LNG regasification
LNG capacity
Number of units
Capital cost
Operations and maintenance
Power requirement
Natural gas consumption
Total operating cost
Total cost
TABLE 4. CO2 liquefaction
Value chain block
CO2 liquefaction
CO2 captured
Capital cost
Operations and maintenance
Power consumption
Total operating cost
Total cost
38 Q4 2021 | H2-Tech.com
Capacity
565,050 metric tpy
1
-
-
969,322 kWth
19.7 MWe
-
-
Specific value, $/
metric t H2
Qatar
-
-
55
66
390
34
490
545
Notes
See Reference 1717
Including BOG recovery
from storage
Part of one
7.8-metric-MMtpy train
value
and location for these costs.
LNG liquefaction (TABLE 2) is a portion
of the QG2 mega trains using the
APCI AP-X process (FIG. 7), which is a
combination of a typical C3MR LNG
liquefaction unit with an additional N2
subcooling section to increase the standard
capacity up to 7.8 metric MMtpy.
Revenue from byproducts, such as NGL
and condensate, has not been considered.
LNG storage is based on the installed
LNG storage capacity in Qatar as part of
the QG2 value chain, prorated for the
study capacity. Jetty infrastructure costs
are not included. The storage tanks are
full-containment type cryogenic tanks.
The assumed 0.1 vol%/d BOG is sent to
liquefaction for recovery and included in
the material balance.
LNG transportation is based on
Capacity
0.5412 metric MMtpy
1
-
-
0.21 MWe
11.4 MWh
-
-
Specific value, $/metric t H2
UK (in-house reference)
-
-
0.7
1
1
7
8
9
Qmax LNG carriers as part of the QG2
value chain prorated for the study capacity.
This results in a utilization of 42%
for the one ship considered; however, in
practice, this ship is utilized as part of the
full fleet, so there is some additional CAPEX
attributed to this study, which could
be adjusted marginally downwards. It is
assumed that the 0.12 vol%/day boiloff
rate (BOR)11
is used as the ship fuel and
any excess is reliquefied onboard, which
is considered in the material balance.
LNG storage is based on the installed
Capacity
1.32 metric MMtpy
-
-
17.5 MWe
-
-
Specific value, $/metric t H2
UK
-
8
13
55
68
77
LNG storage capacity at South Hook as
part of the QG2 value chain, prorated for
the study capacity. Jetty infrastructure
costs are not included. The storage tanks
are full-containment type cryogenic
tanks. The assumed 0.1 vol%/d BOG is
recovered as part of the feed to the SMR.
LNG regasification (TABLE 3) is based
on an assumed minimum installed capacity
of 15.6 metric MMtpy as part of the
QG2 value chain and prorated for the
study capacity. Submerged combustion
vaporizers (SCV) are installed at South
Hook and use natural gas as fuel.
H2
units with associated CO2
production is based on two SMR
capture. The
http://www.H2-Tech.com
H2Tech - Q4 2021

Table of Contents for the Digital Edition of H2Tech - Q4 2021
