Ikelic - Alliance Digital Repository

COAL
turbine is optimized, by replenishing the mass
deficit by saturating the diluted coal gas with
water vapor. In order to be able to start the air
separation unit independent from the gas turbine,
a separate startup booster compressor for air
was installed.
Steam side integration means that the steam sys
tems of the gasification and gas cooling sections,
including those of the gas treating etc. were fully
integrated with the steam systems of the com
bined cycle unit and the auxiliary boiler.
Status of the Integrated Operation
As of August 1994 the following had been
achieved:
- 25
- Satisfactory
- More
- More
-
- Integrated
- Several
gasification runs recorded
coal gasification process
performance of the Shell
than 6,000 operating hours for the
air separation plant
than 4,000 hours combined cycle
operation with natural gas
Satisfactory operation of all units and sys
tems on a stand-alone basis
operation tested and validated
successful test runs with coal
gas to gas turbine at 50-75 percent load
The original startup schedule was stretched out,
mainly due to unavailability and operating
problems in the combined cycle plant, by about
6 months.
####
4-5
NEDOL 150 TON/DAY UQUEFACTION PILOT
PLANT TO BE COMPLETED IN 1996
Nippon Coal Oil Company, Ltd. (NCOL) has been
commissioned by Japan's New Energy and In
dustrial Technology Development Organization
(NEDO) to design, construct and operate a
150 ton per day bituminous coal liquefaction pilot
plant based on the NEDOL process. This work is
being undertaken as a project of the New Sun
shine Program-sponsored by the Ministry of In
ternational Trade and Industry.
A progress report on the project was given by
NCOL's H. Ishibashi et al. at the 1 1th Annual Pitts
burgh Coal Conference last fall. This will be the
first coal liquefaction pilot plant built in Japan.
The civil engineering and foundation work at
Kashima, Ibaraki Prefecture was initiated in 1991,
and the installation of equipment commenced in
1993. Construction is scheduled for completion
by June 1996.
The NEDOL Process
Figure 1 gives a schematic flow chart of the
NEDOL process. This process is characterized
by a wide applicability to various coal grades,
such as low-rank bituminous coal, subbituminous
coal and low-rank subbituminous coal. It is a
single-stage liquefaction method that combines
the advantages of a hydrogen-donor solvent and
a fine iron catalyst. A vacuum distillation system
for solid-liquid separation is used to improve
reliability. The simplicity
ensure a high degree of stability.
of this process is said to
Typical conditions for liquefaction are as follows:
- Pressure:
- Temperature:
- Catalyst:
16.7 MPa
450C
fine particles of iron compound
THE SYNTHETIC FUELS REPORT, JANUARY 1995