Dakota Gasification Company Dakota Gasification Company
Dakota Gasification Company Dakota Gasification Company
Dakota Gasification Company Dakota Gasification Company
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<strong>Dakota</strong><br />
<strong>Gasification</strong><br />
<strong>Company</strong>
<strong>Dakota</strong> <strong>Gasification</strong> <strong>Company</strong>’s<br />
Great Plains Synfuels Plant (GPSP)<br />
Concept started in early 1970s<br />
GPSP built by a consortium<br />
of 5 pipeline companies<br />
Construction began in 1981<br />
Synthetic Natural Gas (SNG)<br />
production began in 1984<br />
2
A new owner….DGC<br />
A technological marvel but not a financial success…<br />
Original Owners Default<br />
The original investors defaulted on August 1, 1985, about one year<br />
after first gas was put in the pipeline, due to the very low price of<br />
natural gas.<br />
DOE Operation Period<br />
The DOE operated the plant from 1985 until 1988<br />
Sold to Basin Electric Power Cooperative<br />
Basin Electric purchased the plant from the DOE & formed DGC, a<br />
wholly owned subsidiary to operate the facility.<br />
3
DGC’s Great Plains Synfuels Plant<br />
A Unique Facility<br />
Only commercial coal gasification facility producing synthetic<br />
natural gas<br />
Byproducts sales of anhydrous ammonia, liquid nitrogen, &<br />
sulfur<br />
Diversification of products began in 1989 with initial $25 million<br />
for capital projects for phenol/cresylic acid & xenon/krypton<br />
Installation of flue gas desulfurization project to produce<br />
DakSul45 in 1996<br />
1100 ton/day Anhydrous Ammonia Plant completed in 1997<br />
Carbon Dioxide (CO 2 ) Pipeline for Enhanced Oil Recovery (EOR)<br />
in 2000<br />
4
Great Plains Synfuels Plant<br />
Process Flow<br />
SYNTHESIS GAS<br />
OXYGEN<br />
PLANT<br />
OXYGEN<br />
BOILER<br />
FEED<br />
WATER<br />
RAW GAS<br />
STEAM<br />
TO PLANT<br />
STEAM<br />
SYSTEM<br />
GRAVITY<br />
SEPARATION<br />
CONDENSED<br />
PROCESS<br />
WATER<br />
COOLED<br />
RAW GAS<br />
TAR OIL<br />
MIXED GAS<br />
NAPHTHA<br />
FGD SCRUBBER<br />
CO2<br />
WASTE<br />
GAS<br />
CONDENSED<br />
PROCESS<br />
WATER TO<br />
WATER<br />
TREATMENT<br />
BOILER<br />
FEED<br />
WATER<br />
HIGH PRESSURE<br />
STEAM TO PLANT<br />
STEAM SYSTEM<br />
WASTE HEAT<br />
RECOVERY<br />
KRYPTON/<br />
XENON<br />
LIQUID<br />
NITROGEN<br />
RAW<br />
GAS<br />
LIQUOR<br />
BYPRODUCT<br />
PURIFICATION<br />
AMMONIA<br />
PHENOL<br />
AMMONIUM<br />
SULFATE<br />
STACK<br />
CO2<br />
COMPRESSION<br />
CRESYLIC ACID<br />
WATER TO<br />
COOLING TOWER<br />
5
Committed to Health, Safety &<br />
the Environment<br />
Environmentally Compliant<br />
Enhanced Plant Efficiencies<br />
Adopted ACC’s Responsible Care<br />
Policy 2007<br />
6
The Environment<br />
Ambient air is monitored continuously at four sites for<br />
SO 2 & NO X<br />
Groundwater is monitored at more than 100 wells<br />
Reduced CO 2 emissions by 49% since 2000 thru carbon<br />
capture and sequestration activities<br />
Ammonium Sulfate - an environmentally friendly product<br />
BNSF Railway 2007 Product Stewardship Award<br />
Surrounding communities outreach<br />
Reverse 911 system<br />
7
Byproducts<br />
Carbon<br />
Dioxide<br />
Naphtha<br />
Anhydrous<br />
Ammonia<br />
Natural Gas<br />
Liquid Nitrogen<br />
Krypton/Xenon<br />
Ammonium<br />
Sulfate<br />
Cresylic<br />
Acid<br />
Phenols<br />
8
DGC and CO 2<br />
Weyburn and Midale, Saskatchewan<br />
13 Million Tons Sequestered To Date<br />
240 mmscf/d<br />
Pipeline capacity<br />
CO 2 PIPELINE<br />
Current flow rate:<br />
153 mmscf/d<br />
Compressors<br />
CO 2<br />
World’s Largest Carbon Capture<br />
and Sequestration Project<br />
9
DGC’s CO 2 Pipeline<br />
205 miles<br />
Recently featured on the<br />
History Channel’s “Modern<br />
Marvels”<br />
14” & 12” carbon steel<br />
pipe<br />
Strategically routed through<br />
Williston Basin oil fields<br />
Pipeline take offs already<br />
installed<br />
10
Xenon/Krypton Gases<br />
Capacity to produce 3.1 million liters per<br />
annum<br />
Used high-intensity halogen lighting, lasers &<br />
thermal pane windows<br />
Krypton: 89%<br />
Xenon: 7.7%<br />
O 2 /Argon: 3.3%<br />
11
Liquid Nitrogen<br />
Capacity to produce 24 million gallons per<br />
annum<br />
Used for food processing refrigeration, as<br />
an oil well additive and in artificial<br />
insemination, chemical processes, &<br />
medical procedures<br />
Product specification 99.99%<br />
12
Phenol<br />
Capacity to produce 33 million lbs per annum<br />
Fleet of 34 railcars<br />
Used in:<br />
Plywood/OSB/Insulation<br />
Countertops/Overlays/Exterior Siding<br />
DVDs/CDs<br />
Automotive Parts<br />
Caprolactum-Nylon 6<br />
Circuit Boards<br />
Pharmaceuticals<br />
Purity: >99.9%<br />
13
Cresylic Acid<br />
Mixture of cresols & xylenols<br />
Capacity of 33 million pounds per annum<br />
Used in:<br />
Pesticides/Insecticides<br />
Antioxidants/Vitamin E<br />
Wire enamel coatings<br />
Dyes/Solvents<br />
Pyrethroids<br />
Automotive Parts<br />
Semiconductor materials<br />
Electronic chips<br />
Alkylphenols<br />
Resins<br />
Fleet of 48 Railcars<br />
Useful Cresylics >94%<br />
14
Naphtha<br />
Capacity of 7 million gallons per<br />
annum<br />
Fleet of 25 railcars<br />
Used as a gasoline blend stock,<br />
in making paint thinner & other<br />
solvents & feedstock for benzene,<br />
toluene, & xylenes<br />
15
Anhydrous Ammonia<br />
Capacity to produce 400,000 tons per<br />
annum<br />
Fleet of 223 railcars<br />
Truck loading facility<br />
Fertilizer for farming & as chemical feedstock<br />
16
Ammonium Sulfate<br />
Created to utilize the sulfur oxide removed from<br />
the plant boiler steam in order to be compliant with<br />
the Clean Air Act of 1990<br />
DGC’s flue gas desulfurization unit is removing<br />
93% of the sulfur<br />
Capacity to produce 60,000 tons per annum<br />
On site storage for 40,000 tons<br />
Fleet of 25 railcars<br />
Truck loading facility<br />
Ammonia: 21% as N<br />
Sulfur: 24% as S<br />
17
Great Plains Synfuels Plant<br />
Today<br />
Work Force: more than 700 people<br />
Coal Usage: ≈ 18,000 tons daily<br />
Daily Production Capacity: 170 mmscfd SNG,<br />
along with many byproducts<br />
Annual Plant Loading Factor: 90-92%<br />
Reduced CO 2 emissions by 49%<br />
since 2000<br />
18
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